A Stexoo-Atlas of Ostracod Shells w _ M "* '■'“■■k. in the University of Leicester, England INSTRUCTIONS TO AUTHORS Contributions illustrated by scanning electron micrographs of Ostracoda in stereo-pairs are invited. Full instructions may be obtained on request from the Editors. Format should follow the style set by the majority of papers in this issue. The Editors should be consulted for advice before figures for plates are mounted. Descriptive matter apart from illustrations should be cut to a minimum; preferably each plate should be accompanied by one page of text only. Department of Geology, The University, Leicester. ACKNOWLEDGEMENTS The publication of Vol. 2 of this serial has been made possible by the generous donations received from the Smithsonian Institution of Washington, D.C., U. S. A., the Dennis Curry Charitable Trust, and the Shell International Petroleum Company Limited. The University of Leicester has sponsored the publication of Vols. 1 and 2. Editorial expenses have been supported by N.E.R.C. grant No. GR3/2198. VOLUME 3 Financial provision for the publication of Vol. 3 has been promised by a number of organisations. The volume will be published in two parts during the course of 1976. The increased costs of printing and distribution necessitate raising the annual subscription to £12.00. The present editors are pleased to report that Dr. R. H. Bate of the British Museum (Natural History) and Dr. J. W. Neale of the University of Hull have accepted an invitation to join the editorial team. Subscriptions to Vol. 3 should be addressed to Dr. R. H. Bate, Department of Palaeontology British Museum (Natural History), Cromwell Road, London, SW7 5BD. Cheques should be made payable to Dr. R. H. Bate. STEREO-VIEWING FOR USERS OF THE ATLAS In order to gain maximum information and benefit from the use of the Stereo-Atlas it is essential that the user view the micrographs stereoscopically. Small pocket-sized stereo- viewers are most suitable for this purpose. Two suppliers are: C. F. Casella & Co. Ltd., Regent House, Britannia Walk, London, N1 7ND, and Air Photo Supply Corp., 158, South Station, Yonkers, New York 10705. Plates printed by Broadwater Press Limited, Welwyn Garden City, Herts., England. Stereo-Atlas of Ostracod Shells, 2:36:223-230 (1975) Urocythereis phantastica (1 of 8) 595.337.14 (119.3 + 119.9) (458.1:161.013.38 + 262.2:161.034.35 + 262.2:161.034.34): 551.351 + 552.54 ON UROCYTHEREIS PHANTASTICA ATHERSUCH AND RUGGIERI sp. nov. by J. Athersuch and G. Ruggieri (University of Leicester } England and University of Palermo3 Italy) Urocythereis phantastica sp. nov. Holotype: Brit. Mus. (Nat. Hist.) nos. 1974.755a, b (RV & LV) ; 9 carapace. Type locality: SE coast of Cyprus, long. 34°04,00"E, lat. 35°00,26"N. Recent, marine, coarse shell sand; depth 13 m, salinity 39,°oo, water temperature 23°C. : Derivation of name: Latin, ’fantasy', suggesting a creature of the imagination. Diagnosis: Muri high, often discontinuous, normally bearing a well developed tegmen which forms short angular, occasionally anastomosing branches. Figured specimens: Brit. Mus. (Nat. Hist.) nos. 1974.755a (9 RV: Pi. 2:36:224, fig. 1; PI. 2:36:230, figs. 1, 3), 1974.755b (9 LV: Pi. 2:36:226, fig. 2; PI. 2:36:228, figs. 3-5), 10 6266 (? 9 LV: Pi. 2:36:224, fig. 2; PI. 2:36:230, figs. 2, 4, 5), 1974.756 (d car.: Pi. 2:36:226, fig. 1), 1974.757 (RV: Pi. 2:36:228, fig. 1), 1974.758 (RV: Pi. 2:36:228, fig. 2), 1974.759 (LV: Pi. 2:36:228, fig. 6), 1974.837 (9 appendages: text-fig. la, b; text-fig. 2a-d) , 1974.838 (d rt. hemipene: text-fig. lc) . Explanation of Plate 2:36:224 Fig. 1, 9 RV, ext. lat. (1974.755a, 963 ym long); fig. 2, ?9 LV, ext. lat. (10 6266, 976 ym : • long) . Scale A (250 ym ; *101), fig. 1; scale B (250 ym ; *97), fig. 2. Stereo-Atlas of Ostracod Shells, 2:36:225 Urocythereis phantastica (3 of 8) Figured specimens: 1974.755-1974.759, 1974.837, 1974.838 all Recent; collected by (contd. ) J. Athersuch during autumn 1973 from the coast of Cyprus. 1974.755 (holotype) had remnants of soft parts within the carapace when collected. 1974.756-1974.759 from long. 34°04'E, lat. 34°58'N; marine, coarse sand, depth 17 m, salinity 39°oo , water temperature 20.5°C. 1974.837 from long. 34o02'00"E, lat. 35°04'30"N; marine, amongst weeds, depth 8 m, salinity 39%c, water temperature 23°C. 1974.838 from long. 34o04'00"E, lat. 35 ° 00 ' 26"N ; marine, amongst fine weed on rock surface, depth 11 m, salinity 39%o, water temperature 22°C. 10 6266 from the Sicilian (lower Pleistocene); collected by G. Ruggieri from excavations in white, soft calcarenite, Viale del Fante, Palermo, Sicily; long. 13°23'E, lat. 38° 08 ' N . Remarks: Specimens show considerable variation in the development of the tegmen (Pi. 2:36:230, figs. 1, 2, 4, 5). In some specimens a very thin calcareous membrane, for which the new name suprategmen is proposed (Latin: plural suprategmina) , may be observed overlying (Pi. 2:36:230, fig. 4) and occasionally linking (Pi. 2:36:230, fig. 5) the branches of the tegmen. The fossil specimen has a suprategmen with reticulate borders (Pi. 2:36:230, figs. 4, 5). Males more elongate. Distribution: Known so far from the Lower Calabrian and Sicilian (lower Pleistocene) in Sicily and the Recent of Cyprus. Possibly also occurs Recent in Tunisia. Explanation of Plate 2:36:226 Fig. 1, d car., ext. vent. (1974.756, 1073 ym long); fig. 2, 9 LV, int. lat. (1974.755b, 951 ym long) . Scale A (250 ym ; x88) , fig. 1; scale B (250 ym ; x!02), fig. 2. Stereo-Atlas of Ostracod Shells, 2:36:224 Urocythereis phantastica (2 of 8) Stereo-Atlas of Ostracod Shells, 2:36:226 Urocythereis phantastica (4 of 8) Stereo-Atlas of Ostracod Shells, 2:36:227 Urocythereis phantastica (5 of 8 ) Text-fig. 1. Appendages of U. phantastica. la, b: right first & second antennae (1974.837) ; lc: right hemipene (1974.838). Explanation of Plate 2:36:228 Fig. 1, RV int. lat. , terminal hinge elements (1974.757); fig. 2, RV int. lat . , terminal hinge elements (1974.758); figs. 3, 4, $ LV, int. lat., terminal hinge elements (1974.755b); fig. 5, 9 LV, int. muse. sc. (1974.755b); fig. 6, LV, int. muse. sc. (1974.759). Scale A (100 ym ; *268) , figs. 1-4; scale B (100 ym ; *252) / fig- 5; scale C (100 ym ; *190), fig. 6. Stereo-Atlas of Ostracod Shells, 2:36:229 Urocythereis phantastica (7 of 8) Text-fig. 2. Appendages of U. phantastica. la-c: first to third left thoracic legs, (1974.837); Id: left mandible (1974.837). Explanation of Plate 2:36:230 Fig. 1, 9 RV, ext. lat., ornamentation (1974.755); fig. 2, ?9 LV, ext. lat., ornamentation (10 6266); fig. 3, 9 RV, ext. lat., rimmed sieve pore (1974.755); figs. 4, 5, ?9 LV, ext. lat., tegmen & suprategmen (10 6266). Scale A (100 ym ; x330) , fig. 1; scale B (100 ym ; *252) , fig- 2; scale C (5 ym ; *4500), fig. 3; scale D (25 ym ; x750) , fig. 4; scale E (10 ym ; *2135) , fig- 5. Stereo-Atlas of Ostracod Shells, 2:36:228 Urocythereis phantastica (6 of 8) Stereo-Atlas of Ostracod Shells, 2:37:231-238 (1975) 595.337.14 (118.13) (532:161.049.26): 551.351+552.541 Paragrenocythere biclavata (1 of 8) ON PARAGRENOCYTHERE BICLAVATA AL-FURAIH gen. et sp. nov. by Ali A. F. Al-Furaih (University of Leicester } England) Genus PARAGRENOCYTHERE gen. nov. Type-species: Paragrenocythere biclavata sp. nov. Derivation of name: Comparable to the genus Agrenocythere Benson. Diagnosis: A genus of Trachyleberididae, normally having two well developed posterodorsal clavae. Eye tubercle distinct. Shape rectangular with straight or curved prominent ventro-lateral ridge and prominent subcentral tubercle. Thick shells with thick muri. Hinge amphidont. Remarks: Resembles Agrenocythere Benson, 1972 ( Smithson . Contr . Paleobiol . , no. 12, pp. 58-62) in main features of ornament but differs in presence of a distinct eye tubercle and a distinct posterior cardinal process (accommodating posterior hinge socket) in the left valve. The so-called "bullar" series consists of two dorsal projections which are better likened to the clavae of Sylvester-Bradley & Benson (Lethaia , vol. 4, no. 3, pp. 249-286, 1971) than to bullae. Explanation of Plate 2:37:232 9 RV, ext. lat. (10 6811, 805 ym long); fig. 2, d LV, ext. lat. (10 6812, 878 ym Scale A (250 ym ; xl08) , fig. 1; scale B (250 ym ; xioi) , fig. 2. Fig. 1, long) . Stereo-Atlas of Ostracod Shells, 2:37:233 Paragrenocythere biclavata (3 of 8) Remarks (contd.): Castral structure intermediate between Agrenocythere and Oertliella Pokorny. Posterior hinge element more strongly developed than in either Agrenocythere or Oertliella . There are at least two other congeneric species (to be described) within Paragrenocythere. Paragrenocythere biclavata sp. nov. Holotype : Brit, Mus. (Nat. Hist.) 10 6811 9 RV. Type locality: El-Alat well 1 (2044-49 ft below the surface) , eastern part of Saudi Arabia; approx, long. 49°50'E, lat. 26°28'N. Lower Palaeocene; light gray limestone with abundant forarainifera; presumed warm, shallow marine (see Sander, Revue Micropaleont. , vol. 5, no. 1, pp. 3-40, 1962). Derivation of name: From the development of the two posterodorsal clavae. Figured specimens: Brit. Mus. (Nat. Hist.) 10 6811 (9 RV: PI. 2:37:232, fig. 1; PI. 2:37:236, fig. 3; Pi. 2:37:238, fig. 1), 10 6812 (d LV: PI. 2:37:232, fig. 2), 10 6813 (9 LV: Pi. 2:37:234, figs. 1, 3), 10 6814 (9 LV: Pi. 2:37:234, fig. 2), 10 6815 (9 car.: Pi. 2:37:236, fig. 1), 10 6816 (9 car.: Pi. 2:37:236, fig. 2), 10 6817 (d RV: PI. 2:37:238, figs. 2, 3), 10 6818 (9 LV: Pi. 2:37:238, fig. 4). Explanation of Plate 2:37:234 Fig. 1, 9 LV, int. lat. (10 6813, 878 ym long); fig. 2, 9 LV, ext. lat. (10 6814, 829 ym long); fig. 3, 9 LV, int. muse. sc. (10 6813). Scale A (500 ym ; x80) , fig. 1; scale B (500 ym ; x83) , fig. 2; scale C (100 ym ; x216) , fig. 3. Stereo-Atlas of Ostracod Shells, 2:37:235 Paragrenocythere biclavata (5 of 8) Figured specimens: All the figured specimens come from the type locality; 10 6811, 10 6812 (contd. ) and 10 6817 are from a sample at 2044-49 ft, 10 6813 and 10 6814 from 2026-34 ft, 10 6815 and 10 6818 from 2063-72 ft and 10 6816 from 2057- 63 ft. Diagnosis: Subcentral tubercle and cardinal process of the left valve more prominent than in other species. Posterodorsal clavae well developed. Ventro-lateral ridge strong and curved (concave upwards) . Fossae polygonal . Remarks: Shape of posterodorsal clavae variable, directed posteriorly to varying degree. V-shaped frontal muscle scars, four adductor scars on steep posterior slope of muscle scar pit (see Pi. 2:37:234, fig. 3 and text-fig. 2) . Sexual dimorphism: females slightly shorter and higher than males. Distribution: Known so far from the uppermost Cretaceous and Lower Palaeocene (extending through Aruma and Umm er Radhuma Formations; see Powers, R. W. et al.r Prof . Pap. U. S. geol. Surv. , 560-d, 1966). This species has been found in El-Alat well 1 (depth 2105-1865 ft) and Abqaiq well 69 (depth 2340-1790 ft) , Saudi Arabia (see text-fig. 1) . Explanation of Plate 2:37:236 Fig. 1, $ car., ext. dors. (10 6815, 878 ym long); fig. 2, 9 car., ext. vent. (10 6816, 854 ym long); fig. 3, $ RV, ext. ant. (10 6811). Scale A (500 ym ; x72) , fig. 1; scale B (500 ym ; x74) , fig. 2; scale C (100 ym ; x119), fig. 3. Stereo-Atlas of Ostracod Shells, 2:37:237 Paragrenocgthere biclavata (7 of 8) 34° 3 5° 36° 37° 38° 39° 40° 41° 42° 43° 44° 45° 46° 47° 48° 49° 50° 51° 52° 53° i 1 1 r F7T71 Aruma Formation ■ (Jmm er Radhuma Formation 0 50 100 ' ■ ■ ■ i Miles i i i_ 42° 43° 44° 45° 46° 47° 48° 49° 50° 51° 52' Text-fig. 1. Outcrop map of Aruma and Umm er Radhuma Formations (from El-Khayal, Bull. Fac. Sci. Riyadh Univ. , 1974) Text-fig. 2. Muscle scar pattern, in P. biclavata (9 LV, 10 5243) . Explanation of Plate 2:37:238 Fig. 1, 9 RV, ext. post. (10 6811); fig. 2, d RV, ext. ant. obi. (10 6817, 854 ym long); fig. 3, d RV, ext. post. obi. (10 6817); fig. 4, 9 LV, ext. lat. (10 6818, 854 ym long). Scale A (100 ym ; *151) , fig. 1; scale B (250 ym ; *61), figs. 2, 3; scale C (500 ym ; x70) , fig'. 4. Stereo-Atlas of Ostracod Shells, 2:37:236 Paragrenocythere biclavata (6 of 8) Stereo-Atlas of Ostracod Shells, 2:38:239-246 (1975) Ilyocypris schwarzbachi (1 of 8) 595.337.12 (119.3) (430.1:161.007.50): 552.524 ON ILYOCYPRIS SCHWARZBACHI KEMPF by E. K. Kempf (University of Cologne3 Germany) Ilyocypris schwarzbachi Kempf, 1967 1967 II yocypris schwarzbachi sp. nov. E. K. Kempf, Sonderveroff. geol . Inst. Koln, vol. 13, pp. 67-70, pi. 1, figs. 1-13. Holotype: 9 carapace, transferred from Department of Geology, University of Cologne (no. 460) to Senckenberg Museum, Frankfurt (no. Xe 9730). Type locality: Pleistocene loess deposits (horizon F of K. Brunnacker et al . , Mainzer Naturwiss. Arch., vol. 8, p. 119, 1969; vol. 9, fig. 1 between pp. 258- 259, 1970; = ? Elster glacial stage) in clay pit 1 km SW of Kaerlich near Koblenz, German Federal Republic (German Nat. Grid Ref.: R 91380, H 84360; long 7°28'E, lat. 50°23'N). Author's coll., October and November 1966. Explanation of Plate 2:38:240 Fig. 1, d RV, ext. lat. (Xe 9731a, 850 ym long); fig. 2, 9 RV, ext. lat. (Xe 9731b, 850 ym long) . Scale A (100 ym ; xlio) , figs. 1, 2. Stereo-Atlas of Ostracod Shells, 2:38:241 Ilyocypris schwarzbachi (3 of 8) Diagnosis: Shell surface pitted, except on the well developed ridge along the anterior margin, which is decorated with small spines; similar spines occur along the posterior margin. In other respects sexual dimorphism is well developed. Female valves with as many as six prominent conical processes, four aligned near the dorsal margin, the remaining two situated mid- and posteroventrally. Male valves are slightly smaller, especially in height, with conical processes missing or only vaguely developed. The U-shaped ridge in the posterior half, which marks the position of gonad traces, looks somewhat different in male and female valves. Figured specimens: Senckenberg Museum, Frankfurt, nos. Xe 9731a ( d RV : Pi. 2:38:240, fig. 1), Xe 9731b (9 RV: Pi. 2:38:240, fig. 2), Xe 9731c, formerly Department of Geology, University of Cologne, no. 461 (9 car.: PI. 2:38:242, fig. 1), Xe 9731d (9 car.: Pi. 2:38:242, fig. 2), Xe 9731e (9 LV: Pi. 2:38:244, fig. 1), Xe 9731f (d LV: Pi. 2:38:244, fig. 2), Xe 9731g (9 LV: Pi. 2:38:244, fig. 3), Xe 9731h (9 RV : PI. 2:38:246, fig. 1), Xe 9_731i (d RV: Pi. 2:38:246, fig. 2). All specimens are from the type locality and type horizon. Explanation of Plate 2:38:242 Fig. 1, 9 car., ext. vent. (Xe 9731c, 800 ym long); fig. 2, 9 car., ext. dors. (Xe 9731d, 825 ym long) . Scale A (100 ym ; xllO) , figs. 1, 2. Stereo-Atlas of Ostracod Shells, 2:38:242 Ilyocypris schwarzhachi (4 of 8) , ■ ' Stereo-Atlas of Ostracod Shells, 2:38:243 Ilyocypris schwarzhachi (5 of 8) Sex L (mm) H (mm) L/H N X Max . Min. N X Max . Min. N X Max . Min. 99 RV 20 0.845 0.925 0.775 20 0.457 0.500 0.425 20 1.848 1.892 1.785 99 LV 20 0.840 0.915 0.750 20 0.468 0.500 0.412 20 1.795 1.838 1.725 Id RV 20 0.812 0.850 0.775 20 0.430 0.450 0.400 20 1.890 2.000 1.778 dd LV 20 0.818 0.875 0.750 20 0.447 0.475 0.412 20 1.827 1.942 1.758 Table 1. Measurements on specimens from type locality and type horizon; N = no. of specimens, x = mean. Remarks: So far some 80 species of the genus Ilyocypris have been named which, making allowance for synonymy, may represent about 40 true species. The ridge along the anterior margin distinguishes Ilyocypris schwarzhachi from nearly all other species of Ilyocypris . Ilyocypris kashmirensis Bhatia, 1968 ( Micropaleontology , vol. 14, no. 3, p. 476) from the Pleistocene of India seems to be the only other congeneric species with such a ridge. Dr. Bhatia kindly provided me with paratypes of this species. Comparison of material reveals that J. schwarzhachi and J. kashmirensis though closely similar, are certainly not conspecific, as there are some obvious differences in shell character. Explanation of Plate 2:38:244 Fig. 1, 9 LV, ext. lat. (Xe 9731e, 850 ym long); fig. 2, d LV, ext. lat. (Xe 9731f, 850 ym long); fig. 3, 9 LV, int. lat. to show central muse. sc. field (Xe 9731g) . Scale A (100 ym ; xl05) , figs. 1, 2; scale B (30 ym ; x235) , fig. 3. Stereo-Atlas of Ostracod Shells, 2:38:245 Ilyocypris schwarzhachi (7 of 8) Distribution: For some years Ilyocypris schwarzhachi had been known only from the type locality, where it occurred in a horizon of about 50 cm in thickness. From the samples of this type horizon nearly 6000 valves of freshwater ostracodes were obtained, which formed the following community: 1 Candona sp. (undifferentiated instars) 68.6% 2 Ilyocypris schwarzhachi Kempf, 1967 10.3% 3 ' Eucypris' serrata (Mueller, 1900) Aim, 1915 7.3% 4 Candona neglecta Sars, 1887 3.6% 5 Ilyocypris cf. bradyi Sars, 1890 2.0% 6 Herpetocypris reptans (Baird, 1835) Brady & Norman, 1889 1.8% 7 Limnocythere baltica Diebel, 1965 1.8% 8 Limnocythere falcata Diebel, 1968 1.2% 9 Cyclocypris ovum (Jurine, 1820) Mueller, 1912 0.9% 10 Candona levanderi Hirschmann, 1912 0.8% 11 'Eucypris' clavata (Baird, 1838) Daday, 1900 0.4% 12 Candona tricicatricosa Diebel & Pietrzeniuk, 1969 0.3% 13 Limnocythere suessenbornensis Diebel, 1968 0.3% 14 Paralimnocythere compressa (Brady & Norman, 1889) Diebel & Pietrzeniuk, 1969 0.2% 15 Stenocypria fischeri (Lilljeborg, 1883) Mueller, 1901 0.2% 16 Cypris puhera Mueller, 1776 0.1% 17 Potamocypris sp. 0.1% 18 Cypridopsis sp. 0.1L Recently J. schwarzhachi has been found in Middle Pleistocene sediments of Brozany, Czechoslovakia (Absolon, Angabe zur Evolution der SUsswasser- ostracoden periodischer Gewasser, Internat. Symp. Evol . Post-Palaeozoic Ostracoda , Hamburg 1974, in press) and in the Pleistocene of Burgtonna, German Democratic Republic (Diebel & Pietrzeniuk, in preparation). Explanation of Plate 2:38:246 Fig. 1, 9 RV, int. lat. (Xe 9731h, 875 ym long); fig. 2, d RV, int. lat. (Xe 9731i, 800 ym long) . Scale A (100 ym ; *110), figs. 1, 2. Stereo-Atlas of Ostracod Shells, 2:38:244 Ilyocypris schwarzbachi (6 of 8) Stereo-Atlas of Ostracod Shells, 2:39:247-254 (1975) Procytheridea exempla (1 of 8) 595.337.14 (116.223) (786:162.110.46+787:162.108.44): 551.351+552.52 ON PROCYTHERIDEA EXEMPLA PETERSON by P. F. Sherrington and Alan Lord ( Robertson Research ( North America) Ltd., Calgary and University College, London ) Genus PROCYTHERIDEA Peterson, 1954 Type-species (by original designation) : Procytheridea exempla Peterson, 1954 Procytheridea exempla Peterson, 1954 1954 Procytheridea exempla sp. nov . J. A. Peterson, J. Paleont., vol. 28, p. 171, pi. 19, figs. 6, 10, 12, 13; ? figs. 7, 8, 11, 14; non fig. 9. ? 1955 Procytheridea exempla Peterson; D. M. Loranger, Proc. geol. Ass. Can., vol. 7, p. 53, pi. 8, figs. 3, 4. ? 1960 Procytheridea exempla Peterson; J. H. Wall, Rep. Dep. Miner. Resour. Sask., no. 53, p. 141, pi. 25, figs. 2, 4. ? 1962 Procytheridea exempla Peterson; I. Weihmann, Hermann-Aldinger-Festschrift, Stuttgart, p. 194, pi. 9, figs. 1-4. ? 1966 Procytheridea ? aff. exempla Peterson; H. J. Oertli in W. Maync, Bull. geol. Surv. Israel, no. 40, pi. IX, figs. 24-26. 1972 Procytheridea exempla Peterson; M. M. Brooke & W. K. Braun, Rep. Dep. Miner. Resour. Sask., no. 161, pi. 3, figs. 14, 16-19; non figs. 9-13, 15, 20 (see also pis. 20, 22, 23). Explanation of Plate 2:39:248 Fig. 1, 9 car., ext. rt. lat. (U.S.N.M. 117930, 540 ym long); fig. 2, d car., ext. rt. lat. (10 6784, 630 ym long). Scale A (250 ym ; xi35) r fig. 1; scale B (250 ym ; *115) , fig. 2. Stereo-Atlas of Ostracod Shells, 2:39:249 Procytheridea exempla (3 of 8) Holotype: United States National Museum, Washington, no. U.S.N.M. 117930, 9 carapace; figured herein Pi. 2:39:248. fig. 1. Type locality: Red Gulch, Sheridan County, Wyoming, U. S. A. (sec. 22, T.58N, R.89W; long. 107°35'W, lat. 44°59'30"N); Rierdon Formation, Callovian. [Paratypes: Four from type locality and four specimens from Bacon Ranch, Piper, Fergus County, Montana, U. S. A. (sec. 17, T.14N, R.20E; long. 109°12'30"W, lat. 46°58 ' 30"N) ; Rierdon Formation, Callovian]. Figured specimens: U.S.N.M. no. 117930 (9 car.: Pi. 2:39:248, fig. 1); Brit. Mus. (Nat. Hist.) nos. 10 6784 {d car.: Pi. 2:39:248, fig. 2), 10 6785 (? juv.-l car.: Pi. 2:39:250, fig. 1), 10 6786 (d car.: Pi. 2:39:250, fig. 2), 10 6787 (9 car.: Pi. 2:39:252, fig. 1; Pi. 2:39:254, fig. 2), 10 6788 (9 car.: Pi. 2:39:252, fig. 2) and 10 6789 (9 car.: Pi. 2:39:254, fig. 1) . All specimens (except holotype) from Rierdon Formation at the Bacon Ranch section, Montana (sec. 17, T.14N, R.20E; long. 109°12'30"W, lat. 46°58'30"N), samples 12 (specimens 10 6785-6789) and 13 (specimen 10 6784); coll. Sherrington and Lord. Explanation of Plate 2:39:250 Fig. 1, ? juv.-l car., ext. rt. lat. (10 6785, 510 ym long); fig. 2, d car., ext. dors. (10 6786, 630 ym long). Scale A (250 ym ; xl35) , fig. 1; scale B (250 ym ; xllO) , fig. 2. Procytheridea exempla (2 of 8) Stereo-Atlas of Ostracod Shells, 2:39:250 Procytheridea exempla (4 of 8) Stereo-Atlas of Ostracod Shells, 2:39:248 - Stereo-Atlas of Ostracod Shells, 2:39:251 Procytheridea exempla (5 of 8) Diagnosis: A species of Procytheridea with a strongly developed reticulate ornament, where the primary ribbing is only slightly more developed than the intervening reticulation. Valves strongly inflated with mid-ventral expansion; sexually dimorphic. Remarks: Tbe material from Bacon Ranch has suffered recrystallisation and also appears worn, which together with dirt that could not be removed explains the relatively weaker appearance of the ornament on our specimens when compared with that of the holotype. The state of preservation also prevents us from adding to knowledge of the internal structures of Procytheridea. However, comparative material of Procytheridea fraudator Sherrington & Lord sp. nov. (see Stereo-Atlas of Ostracod Shells , vol. 2, pt. 4, pp. 255-262, 1975) from Saskatchewan was found to possess antimerodont hingement, a row of four vertically disposed central muscle- scars with a rounded frontal scar and simple, straight marginal pore canals (6-7+ anteriorly and 3-4 posteriorly) . Procytheridea exempla and P. fraudator sp. nov. both possess a rounded frontal scar. Explanation of Plate 2:39:252 Fig. 1, 9 car., ext. It. lat. (10 6787, 590 ym long); fig. 2, 9 car., ext. rt. lat . (10 6788, 580 ym long) . Scale A (250 ym ; xllO) , fig. 1; scale B (250 ym ; xl20) , fig. 2. Stereo-Atlas of Ostracod Shells, 2:39:253 Procytheridea exempla (7 of 8) Distribution: Rierdon and Lower Sundance Formations, Callovian of Montana and Wyoming; rare in the Lower Vanguard Formation, Callovian of Saskatchewan. One uncertain record from the Callovian and Oxfordian of Israel (Oertli in Maync, op. cit.). Ackncwledg orients: To Dr. R. H. Benson for providing the stereo-pair of the holotype, and to Dr. J. H. Wall for comparative material. Explanation of Plate 2:39:254 Fig. 1, 9 car., ext. rt . lat. (10 6789, 635 ym long); fig. 2, 9 car., ext. rt. lat (10 6787) . Scale A (250 ym ; xllO), fig. 1; scale B (250 ym ; *100), fig. 2. Stereo-Atlas of Ostracod Shells, 2:39:252 Procytheridea exempla (6 of 8) Stereo-Atlas of Ostracod Shells, 2:39:254 Procytheridea exempla (8 of 8) Stereo-Atlas of Ostracod Shells, 2:40:255-262 (1975) Procytheridea fraudator (1 of 8) 595.337.14 (116.223) (786:162.110.46+712.4:162): 551.351+552.52 ON PROCYTHERIDEA FRAUDATOR SHERRINGTON AND LORD sp. nov. by P. F. Sherrington and Alan Lord C Robertson Research. (Forth America) Ltd . 3 Calgary and University College > London ) Procytheridea fraudator sp. nov. 1954 Procytheridea exempla sp. nov. J. A. Peterson, J. Paleont. , vol. 28, p. 171, pi. 19, fig. 9, ? figs. 7, 8, 14. 1960 Procytheridea exempla Peterson; J. H. Wall, Rep. Dep. Miner. Resour. Sask. , no. 53, p. 141, pi. 25, figs. 1, 3, ? figs. 5, 6. ? 1962 Procytheridea exempla Peterson; I. Weihmann, Hermann-Aldinger-Festschrift, Stuttgart p. 194, pi. 9, figs. 1-4. 1972 Procytheridea exempla Peterson; M. M. Brooke & W. K. Braun, Rep. Dep. Miner. Resour. Sask., no. 161, pi. 3, figs. 9-13, 15, 20 (see also pis. 20, 22, 23). Holotype: Brit. Mus. (Nat. Hist.) no. IO 6791, carapace. Type locality: Bacon Ranch, Piper, Fergus County, Montana, U. S. A. (sec. 17, T.14N, R.20E; long. 109°12'30"W, lat. 46°58'30"N); Rierdon Formation, Callovian Explanation of Plate 2:40:256 Fig. 1, car., ext. It. lat. (10 6791, 560 ym long); fig. 2, car., ext. rt. lat. (10 6792, 525 ym long) . Scale A (250 ym xi30) , figs. 1, 2. Stereo-Atlas of Ostracod Shells, 2:40:257 Procytheridea fraudator (3 of 8) Derivation of name: From the Latin fraudator , an imposter. Diagnosis: A species of Procytheridea with strong primary ornament and a weak secondary reticulation in the median area, but lacking the mid-ventral expansion seen in the type-species. Figured specimens: Brit. Mus. (Nat. Hist.) nos. 10 6790 (RV: Pi. 2:40:262, fig. 1), IO 6791 (car.: PI. 2:40:256, fig. 1), 10 6792 (car.: Pi. 2:40:256, fig. 2), 10 6793 (car.: Pi. 2:40:258, fig. 1), IO 6794 (LV: Pi. 2:40:258, fig. 2) 10 6795 (car.: Pi. 2:40:260, fig. 1), 10 6796 (car.: Pi. 2:40:260, fig. 2), and IO 6798 (LV: PI. 2:40:262, fig. 2). Specimens 10 6791-10 6796, 10 6798 are from the same locality and sample (no. 9; coll. Sherrington and Lord) as the holotype, Rierdon Formation at the Bacon Ranch section, Montana. Specimen 10 6790 is from sample K7 , 3538-3546 ft, Tidewater Keistern Crown no. 1 borehole, Saskatchewan, Canada; Lower Vanguard Formation (for data see J. H. Wall, op. cit., pp. 162-166). Explanation of Plate 2:40:258 iig. 1, car., ext. It. lat. (10 6793, 540 ym long); fig. 2, LV ext. lat. (10 6794, 540 ym long) . Scale A (250 ym ; x135) , fig. 1; scale B (250 ym ; *140) , fig. 2. Stereo-Atlas of Ostracod Shells, 2:40:256 Procyt her idea fraudator (2 of 8) Stereo-Atlas of Ostracod Shells, 2:40:258 Procytheridea fraudator (4 of 8) ' ' Procytheridea fraudator (5 of 8) Stereo-Atlas of Ostracod Shells, 2:40:259 Remarks: Our investigations showed that Procytheridea exempla Peterson, 1954 was associated with a clearly closely related, but readily distinguishable form which we propose as a new species. In our opinion the two species have been confused by previous workers, hence the allusion in the specific name. Procytheridea fraudator differs from the type-species in the development of the surface ornament and in the lack of any ventral expansion . P. fraudator was found to possess antimerodont hingement, a row of four vertically disposed central muscle-scars with a rounded frontal scar and simple, straight marginal pore canals (6-7+ anteriorly and 3-4 posteriorly) . The positions of the small raised tubercles containing normal pore canals in the anterior and posterior portions of the valves of P. fraudator are consistent. Distribution : Known from the Rierdon, Lower Sundance and Lower Vanguard Formations, Callovian of Montana, Wyoming and Saskatchewan. Fig . 1 , car . , ext 540 ym long) . Explanation of Plate 2:40:260 dors. (10 6795, 550 ym long); fig. 2, car., ext. rt. lat. (10 6796, Scale A (250 ym ; xl30) , figs . 1 , 2 . Stereo-Atlas of Ostracod Shells, 2:40:261 Procytheridea fraudator (7 of 8) Explanation of Plate 2:40:262 Fig. 1, RV int. lat. (10 6790, 650 ym long); fig. 2, LV int. lat. (10 6798, 525 ym long). Scale A (250 ym ; xlOO) , fig. 1; scale B (250 ym ; xl35) , fig. 2. Stereo-Atlas of Ostracod Shells, 2:40:260 Procytheridea fraudator (6 of 8) Stereo-Atlas of Ostracod Shells, 2:40:262 Procytheridea fraudator (8 of 8) ' Stereo-Atlas of Ostracod Shells, 2:41:263-266 (1975) Micropneumatocy there crassa (1 of 4) 595.337.14 (116.223) (786:162.110.46): 551.351+552.52 ON MICROPNEUMATOCYTHERE CRASSA (PETERSON) by P. F. Sherrington and Alan Lord ( Robertson Research (North America) Ltd., Calgary and University College, London) Micropneumatocy there crassa (Peterson, 1954) 1954 Procytheridea crassa sp. nov. J. A. Peterson, J. Paleont . , vol. 28, p. 172, pi. 19, figs. 1-5. 1960 Procytheridea crassa Peterson; J. H. Wall, Rep. Dep. Miner. Resour. Sask. , no. 53, p. 140, pi. 25, figs. 7, 8. 1962 Procytheridea crassa Peterson; I. Weihmann, Hermann-Aldinger-Festschrift , Stuttgart, p. 194, pi. 9, figs. 5, 6. ? 1966 Procytheridea ? aff. crassa Peterson; H. J. Oertli in W. Maync , Bull, geol . Surv. Israel, no. 40, pi. X, figs. 76-78. 1972 Procytheridea crassa Peterson; M. M. Brooke & W. K. Braun, Rep. Dep. Miner. Resour. Sask., no. 161, pi. 3, figs. 21-31 (see also pis. 21, 22). Holotype: United States National Museum, Washington, no. U.S.N.M. 117927, 9 carapace . Type locality: Bacon Ranch, Piper, Fergus County, Montana, U. S. A. (sec. 17, T.14N, R.20E; long. 109°12,30"W, lat. 46°58,30"N); Rierdon Formation, Callovian Explanation of Plate 2:41:264 Fig. 1, 9 car., ext. It. lat. (10 6799, 565 ym long); fig. 2, d car., ext. dors. (10 6800, 610 ym long); fig. 3, ?9 car., ext. rt. lat. (10 6801, 600 ym long). Scale A (200 ym ; xl05) , fig. 1; scale B (200 ym ; xl00) , figs. 2, 3. Stereo-Atlas of Ostracod Shells, 2:41:265 Micropneumatocythere crassa (3 of 4) Figured specimens: Brit. Mus. (Nat. Hist.) nos. 10 6799 (9 car.: Pi. 2:41:264, fig. 1), 10 6800 (d car.: Pi. 2:41:264, fig. 2), 10 6801 (?9 car.: Pi. 2:41:264, fig. 3), 10 6802 (9 car.: PI. 2:41:266, fig. 1), 10 6803 (9 car.: Pi. 2:41:266, fig. 2), and 10 6804 (9 car.: Pi. 2:41:266, fig. 3). All specimens (coll. Sherrington & Lord) from sample 12, Rierdon Formation, Bacon Ranch Section, Montana. Diagnosis: A strongly inflated species of Micropneumatocythere with reticulate ornamentation and pronounced sexual dimorphism. Remarks: The material illustrated here is from the same locality as the types of Procytheridea exempla Peterson, 1954 but is quite distinct from that species and we follow R. H. Bate {Bull. Br . Mus. nat. Hist. (Geol.), vol. 9, p. 29, 1963) in placing it in Micropneumatocythere . The specimens from Saskatchewan, Canada illustrated bv Brooke & Braun (op. cit.) tend to possess a more strongly developed ornament than Peterson's types or our topotype material from Montana. From our material, this variation appears to be due to differences in preservation . Distribution: Rierdon, Lower Sundance and Lower Vanguard Formations, Callovian of Montana, Wyoming, Saskatchewan and Alberta. One uncertain record from the Bajocian of Israel (Oertli in Maync, op. cit.). Explanation of Plate 2:41:266 Fig. 1, 9 car., ext. dors. (10 6802, 545 ym long); fig. 2, 9 car., ext. It. lat. (10 6803, 510 ym long); fig. 3, 9 car., ext. post. vent. obi. (10 6804, 600 ym long). Scale A (200 ym ; xl05) , fig. 1; scale B (200 ym ; xll5) , fig. 2; scale C (200 ym ; xl05) , fig. 3. Stereo-Atlas of Ostracod Shells, 2:41:264 Micropneumatocy there crassa (2 of 4) Stereo-Atlas of Ostracod Shells, 2:41:266 Micropneumatocythere crassa (4 of 4) Stereo-Atlas of Ostracod Shells, 2:42:267-270 (1975) Lophocythere minuta (1 of 4) 595.337.14 (116.223) (786:162.110.46): 551.351+552.52 ON LOPHOCYTHERE (NEUROCYTHERE ) MINUTA (PETERSON) by P. F. Sherrington and Alan Lord ( Robertson Research (North America) Ltd. 3 Calgary and University College 3 London ) Lophocythere ( N euro cy there) minuta (Peterson, 1954) 1954 Procytheridea minuta sp. nov. J. A. Peterson, J. Paleont., vol. 28, pp. 174, 175, pi. 19, figs. 15-19. ? 1955 ? Procytheridea minuta Peterson; D. M. Loranger, Proc. geol . Ass. Can., vol. 7, pi. 11, figs. 5, 6. 1960 Procytheridea minuta Peterson; J. H. Wall, Rep. Dep. Miner. Resour. Sask. , no. 53, pp. 142, 143, pi. 25, figs. 9-12. 1962 Procytheridea minuta Peterson; I. Weihmann, Hermann-Aldinger-Festschrift, Stuttgart, p. 194, pi. 9, fig. 7. 1972 Procytheridea minuta Peterson; M. M. Brooke & W. K. Braun, Rep. Dep. Miner. Resour. Sask., no. 161, pi. 3, figs. 32-44 (see also pis. 17, 21-23, 25). Holotype: United States National Museum, Washington, no. U.S.N.M. 108602, $. Type locality: Red Dome, Pryor Mountains, near Bridger, Carbon County, Montana, U. S. A. (sec. 19, T.7S, R.24E; long. 108°50'W, lat. 45°12 ' 30"N) ; Rierdon Formation, Callovian. [Paratypes: one from the type locality and three from Bacon Ranch, Piper, Fergus County, Montana (sec. 17, T.14N, R.20E; long. 109° 12 1 30"W, lat. 46°58,30"N); Callovian, Rierdon Formation], Explanation of Plate 2:42:268 Fig. 1, 9 car., ext. It. lat. (10 6805, 345 ym long); fig. 2, d car., ext. dors. (10 6806, 345 ym long); fig. 3, $ car., ext. rt. lat. (10 6807, 370 ym long). Scale A (100 ym ; xl60) , figs. 1, 2; scale B (100 ym ; xl55) , fig. 3. Stereo-Atlas of Ostracod Shells, 2:42:269 Figured specimens: Brit. Mus. (Nat. Hist.) nos. 10 6805 (9 PI. 2:42:270, fig. 3), 10 6806 (8 car.: (9 car.: Pi. 2:42:268, fig. 3), 10 6808 and 10 6809 (9 car.: Pi. 2:42:270, fig. Lophocythere minuta (3 of 4) car.: Pi. 2:42:268, fig. 1; PI. 2:42:268, fig. 2), IO 6807 (d car.: Pi. 2:42:270, fig. 1), 2) . All specimens (except Diagnosis: Remarks: Distribution: 10 6806; sample 8) from sample 9, Rierdon Formation, Bacon Ranch, Montana; coll. Sherrington & Lord. Small, diagnostic longitudinal ribbing and secondary reticulation. Material resembles Neurocythere (Whatley, Bull. Br . Mus. nat. Hist. (Geol.), 1970); internal details (imperfectly known) might confirm generic assignment. Brooke & Braun suggest this species may include Protocythere quadricarinata Swain & Peterson, 1952 (Prof. Pap. U. S. geol. Surv. , 243-A) and P. cf. P. quadricarinata of Peterson; both are appreciably larger than L. minuta. Moreover, the latter (rare in Lower Sundance Formation, Wyoming) is poorly preserved and dissimilar in shape to L. minuta, and the former differs in ornament (occupies only median two-thirds of each valve) and range (Upper Sundance Formation [Redwater Shale] and Swift Formation, Oxfordian). P. quadricarinata probably belongs to Neurocythere and may be a derivative of L. minuta. Rierdon Formation of Montana and Lower Vanguard Formation of Alberta and Saskatchewan, Canada; Callovian. Perhaps also from top of Piper Formation (Bathonian) at Bacon Ranch (cf. also range in Brooke & Braun, op. cit. , p. 9, chart 20; from Upper Shaunavon Formation and Lower Shaunavon- Gravelbourg Formation [Bajocian-Bathonian] boundary, SW Saskatchewan). Explanation of Plate 2:42:270 Fig. 1, d car., ext. It. lat. obi. (10 6808, 340 mm long); fig. 2, 9 car. (10 6809, 345 ym long); fig. 3, 9 car., ext. rt. lat. (10 6805). Scale A (100 ym ; xl60) , figs. 1, 3; scale B (100 ym ; xl75) , fig. 2. ext. dors. Stereo-Atlas of Ostracod Shells, 2:42:270 Lophocythere minuta (4 of 4) Stereo-Atlas of Ostracod Shells, 2:42:268 Lophocythere minuta (2 of 4) ' Stereo-Atlas of Ostracod Shells, 2:43:271-278 (1975) Cytheretta teshekpukensis (1 of 8) 595.337.14 (119.1+119.9) (798:162.153.70+268:161.050.79): 551.35 (24.08.10) ON CYTHERETTA TESHEKPUKENSIS SWAIN by John W. Neale (University of Hutt3 England ) Cytheretta teshekpukensis Swain, 1963 1899 Cythere septentrionalis G. S. Brady; T. Scott, J. Linn. Soc . , vol . 27, p. 85 (pars). 1963 Cytheretta teshekpukensis sp. nov. F. M. Swain, J. Paleont., vol. 37, p. 831, pi. 95, figs. 19a, 19b, text-fig. 13a. ? 1969 Cytheretta teshekpukensis Swain; 0. M. Lev, in: Ochenye Zapiski . Paleontologia i Biostratigrafia , pt. 28, p. 30, pis. IV, V. Nauch. Issled. Inst. Geol. Arktiki, Leningrad . 1975 Cytheretta sp. ; J. W. Neale & H. V. Howe, in: Biology and Paleobiology of Ostracoda , p. 395, tab. 2, ed. F. M. Swain, Proc. Delaware Symposium, 1972. Holotype : United States National Mus. coll. no. 647991, $ RV. Type locality: Gubik Formation, Pleistocene, Teshekpuk Lake area, Arctic Coastal Plain, Alaska; Party 43 shot holes, line 2-48, shot-point 73 at 90 ft. Approx, long. 153°W, lat. 70°40'N. Explanation of Plate 2:43:272 Fig. 1, 9 RV, ext. lat. (U.S.N.M. 647991, 1156 ym long); fig. 2, 9 RV, ext. lat. (R.S.M. 1921-145. la, 1280 ym long). Scale A (250 ym ; x82) , fig. 1; scale B (250 ym ; *74), fig. 2. Stereo-Atlas of Ostracod Shells, 2:43:273 Cytheretta teshekpukensis (3 of 8) Figured specimens: U.S.N.M. coll. no. 647991 (9 RV: Pi. 2:43:272, fig. 1). Royal Scottish Museum (R.S.M.), Edinburgh coll. nos. 1921-145. la (9 RV: Pi. 2:43:272, fig. 2), 1921-145. 2a (rf RV: Pi. 2:43:274, fig. 1; Pi. 2:43:276, fig. 2), 1921-145. 2a (d LV: Pi. 2:43:274, fig. 2; Pi. 2:43:276, fig. 1), 1921-145.3 (9 car.: Pi. 2:43:278, fig. 1), 1921-145.4 (d car.: Pi. 2:43:278, fig. 2). U.S.N.M. 647991 from the type locality. 1921-145.3 coll. July 1897 from 2-10 fathoms, W Bay, Cape Flora, Franz Josef Land; approx, long. 50°01'E, lat. 79°57'N. 1921-145. la, 1921-145. 2a (LV & RV) and 1921-145.4 all coll. July 1897 from the vicinity of Cape Flora, Franz Josef Land. Diagnosis: Ornament of fine, oblique longitudinal ribs of which one in the dorsal half of the valve tends to be accentuated and distinctly convex upwards. Well-developed inter-costal pitting and dimorphism. Marginal areas regular with about 25 radial pore canals in anterior half of shell. Remarks: This species occurs in the Pleistocene of Alaska and off Franz Josef Land (approx, long. 50°01'E, lat. 79°57,N) at the present day. Lev (op. cit.) recorded this species from her Normanicythere concinella and Cytheretta teshekpukensis communities from Quaternary deposits in the lower reaches of the R. Yenisei and the Cheski Gulf, but her figure shows the fine longitudinal ribbing to be less oblique and slightly concave upwards. In consequence, the Russian material is only tentatively referred to Swain's species in the synonymy given above. Explanation of Plate 2:43:274 Fig. 1, d RV, ext. lat. (R.S.M. 1921-145. 2a, 1260 ym long); fig. 2, d LV, ext. lat.(R.S.M. 1921-145. 2a; 1260 ym long). Scale A (250 ym ; *75) , figs. 1, 2. Stereo-Atlas of Ostracod Shells, 2:43:274 Cytheretta teshekpukensis (4 of 8) Stereo-Atlas of Ostracod Shells, 2:43:272 Cytheretta teshekpukensis (2 of 8) Explanation of Plate 2:43:276 Fig. 1, d LV, int. lat. (R.S.M. 1921-145. 2a; 1260 ym long); fig. 2, d RV, int. lat. (R.S.M. 1921-145. 2a; 1260 ym long). Scale A (250 ym ; *75) , fig. 1; scale B (250 ym ; *81) , fig. 2. Stereo-Atlas of Ostracod Shells, 2:43:277 Cytheretta teshekpukensis (7 of 8) Explanation of Plate 2:43:278 Fig. 1, 9 car., ext. dors. (R.S.M. 1921-145.3; 1273 ym long); fig. 2, d car., ext. dors. (R.S.M. 1921-145.4; 1290 ym long). Scale A (250 ym ; *73) , fig. 1; scale B (250 ym ; *78) , fig. 2. Stereo-Atlas of Ostracod Shells, 2:43:278 Cytheretta teshekpukensis (8 of 8) Stereo-Atlas of Ostracod Shells, 2:43:276 Cytheretta teshekpukensis (6 of 8) Stereo-Atlas of Ostracod Shells, 2:44:279-282 (1975) 595.337.14 (119.9) (265.22:162.117.31): 551.314 Puriana pacifica (1 of 4) ON PURIANA PACIFICA BENSON by Richard H. Benson (Smithsonian Institution 3 Washington 3 D.C.3 U.S.A.) Puriana pacifica Benson, 1959 1959 Puriana pacifica sp. nov. R. H. Benson, Univ. Kans. Paleont. Contr. Arthro. , art. 1, p. 60, pi. 5, figs. 5a, b; pi. 10, fig. 1. 1967 Puriana pacifica Benson; F. M. Swain, Mem. geol . Soc . Am., no. 101, p. 105, pi. 3, figs, la-c; pi. 6, figs. 4a-c. Lectotype: U.S.N.M. coll. no. 113160, d carapace; Benson, 1959, pi. 10, fig. 1. Designated by R. H. Benson, 1966, J. Paleont., vol. 40, no. 3, p. 476. Type locality: The upper end of the Estero de Punta Banda, Todos Santos Bay, Baja California, Mexico; approx, long. 116°38'W, lat. 31°46'N. Figured specimens: U.S.N.M. coll. no. 113161 ($ car.: Pi. 2:44:280, figs. 1, 2) and 190447 (9 RV: PI. 2:44:282, figs. 1-3). Both specimens are from the type locality at Todos Santos Bay, Baja California, Mexico; Recent. Explanation of Plate 2:44:280 Figs. 1, 2, 9 car. (U.S.N.M. 113161, 610 ym long); fig. 1, ext. It. lat.; fig. 2, detail of area of subcentral tubercle. Scale A (250 ym ; xl38) , fig. 1; scale B (100 ym ; *360) , fig. 2. Stereo-Atlas of Ostracod Shells, 2:44:281 Puriana pacifica (3 of 4) Diagnosis: A species of Puriana with irregular, short and variously oriented plications; surface papillate. Remarks: A peculiar surface structure of thin folds lain flat and oriented with their crests directed towards the posterior. Much less massive than the more rugose or clavate species of Puriana. Distribution: Originally described from the lagoon of Estero de Punta Banda near Ensenada on the Pacific Coast of Baja California. Although it has been subsequently reported from as far S as Nicaragua, it is most typical of latitudes of about 25°-35° in restricted salt-water lagoons along the Pacific and Gulf of California coasts. Explanation of Plate 2:44:282 Figs. 1, 2, 9 RV (U.S.N.M. 190447; 620 ym long); fig. 1, int. lat.; fig. 2, detail of ant. hinge element; fig. 3, detail of post, hinge element. Scale A (250 ym ; *147), fig. 1; scale B (50 ym ; *735) , figs. 2, 3. Stereo-Atlas of Ostracod Shells, 2:44:280 Stereo-Atlas of Ostracod Shells, 2:44:282 Puriana pacifica (4 of 4) Puriana pacifica (2 of 4) Puriana fissispinata (1 of 4) Stereo-Atlas of Ostracod Shells, 2:45:283-286 (1975) 595.337.14 (119.9) (261.64:162.085.28): 551.35 (24.08.30) ON PURIANA FISSISPINATA BENSON AND COLEMAN by Richard H. Benson (Smithsonian Institution 3 Washington 3 D.C.3 U.S.A.) Puriana fissispinata Benson and Coleman, 1963 1963 Puriana fissispinata sp. nov. R. H. Benson & G. L. Coleman, Univ. Kans. Paleont. Contr. Art hr. , art. 2, p. 44, pi. 8, figs. 3, 4, text-fig. 28. Lectotype: U.S.N.M. coll. no. 113213, d carapace; Benson & Coleman (op. cit.), pi. 8, figs. 3, 4. Designated by R. H. Benson, J. Paleont., vol. 40, no. 3, p. 746, 1966. Type locality: The eastern Gulf of Mexico; approx, lat. 28°15'N, long. 84°05'W. Recent, at about 30 m. Figured specimens: U.S.N.M. coll. no. 113213 (d LV: PI. 2:45:284, figs. 1, 2; PI. 2:45:286, fig. 2, and d RV: Pi. 2:45:286, figs. 1, 3). Recent, from the type locality, eastern Gulf of Mexico; 30 m. Explanation of Plate 2:45:284 Figs. 1, 2, d LV (U.S.N.M. 113213, 860 ym long): fig. 1, ext. lat.; fig. 2, detail of area of subcentral tubercle. Scale A (250 ym ; x92), fig. 1; scale B (100 ym ; *230) , fig- 2. Stereo-Atlas of Ostracod Shells, 2:45:285 Puriana fissispinata (3 of 4) Diagnosis: Minutely foveolate, with tegminate labyrinthine fossae (Pi. 2:45:284, fig . 2) . Remarks: Ornament convergent to that seen in Urocythereis lumbricularis (Terquem) (see Stereo-Atlas of Ostracod Shells, vol. 2, pt. 1, pp. 49-52, 1974) . Similar to a yet undescribed late Neogene and Recent species from N Carolina which is also foveolate but whose fossae are joined as long slits . Distribution: Known from a depth range of 25-30 m in the open shallow shelf off W central Florida, U. S. A., in the Gulf of Mexico. Explanation of Plate 2:45:286 Figs. 1-3, d (U.S.N.M. 113213): fig. 1, RV int. lat.; fig. 2, LV, ext. lat. obi.; fig. 3, RV, int. muse. sc. Scale A (250 ym ; x92) , fig. 1; scale B (100 ym ; *92), fig. 2; scale C (50 ym ; *460) , fig. 3. Stereo-Atlas of Ostracod Shells, 2;45.*284 Stereo-Atlas of Ostracod Shells, 2:45:286 Puriana fissispinata (2 of 4) Puriana fissispinata (4 of 4) Stereo-Atlas of Ostracod Shells, 2:46:287-294 (1975) Celtia quadridentata (1 of 8) 595.337.14 (119.9) (261.273:162.006.51 + 261.26:162.002.55 + 261.26:162.002.54 + 261.26:161.000.57): 551.35 ON CELTIA QJJABRIDENTATA (BAIRD) by John W. Neale (University of Hull, England) Genus CELTIA Neale, 1973 Type-species (original designation): Cythere quadridentata Baird, 1850. [See Bull . zool . Nomencl . , vol. 32, pp. 161, 162, 1975]. Diagnosis: Strong holamphidont dentition with strongly buttressed anterior part of hinge and triangular posterior termination in lateral view. Compressed oblong in dorsal view. Costae vestigial or absent and ornamentation of deep slit-like and also equidimensional pits. Exopodite of second antenna club-like and not a Spinnborste. Celtia quadridentata (Baird, 1850) 1850 Cythere quadridentata sp. nov . , W. Baird, Natural History of the British Entomostraca , Ray Soc. Pubis., p. 173, pi. XXI, fig. 2. non 1941 Cythereis (?) quadridentata (Baird); E. Triebel, Senckenbergiana , vol. 23 (4/6), pi. 13. 1973 Celtia quadridentata (Baird); J. W. Neale, Revta esp. Micropaleont . , p. 435, 1 pi., 3 figs. (q.v. for full synonymy). Diagnosis: Shell strongly impressed in the posteroventral region. Explanation of Plate 2:46:288 Fig. 1, 9 RV, ext. lat. (HU. 90. R. 34, 753 ym long); fig. 2, d RV, ext. lat. (HU.49.R.1, 746 ym long) . Scale A (100 ym ; xl25) , figs. 1, 2. Stereo-Atlas of Ostracod Shells, 2:46:289 Celtia quadridentata (3 of 8) Type locality: Obscure. Baird records, "Along with numerous specimens of C. nigrescens , marked as coming from Boston, Torquay and Arran, one single specimen of this pretty species was sent to me by W. C. Williamson, Esq.". Figured specimens: University of Hull coll. nos. HU. 90. R. 34 (9 RV: PI. 2:46:288, fig. 1), HU. 90. R. 35 (9 car.: Pi. 2:46:290, fig. 1), HU. 90. R. 36 {d LV, specimen lost: PI. 2:46:292, fig. 1), HU.49.R.1 (cfRV: Pi. 2:46:288, fig. 2), HU. 49. R. 2 (9 RV: Pi. 2:46:290, fig. 2), HU. 49. R. 3 (d RV: Pi. 2:46:290, fig. 3), HU. 174. R. 24a (9 LV: Pi. 2:46:292, fig. 2; limbs & soft-parts = HU. 174. R. 24b) , HU. 174. R. 22 (9 RV: PI. 2:46:294, figs. 1-3). Specimens HU . 90 . R. 34-36 from 65 fathoms, Celtic Sea; long. 5°55.6'W, lat. 51°17.1'N. Specimens HU. 49. R. 1-3 from 27 fathoms, 7 miles ENE Tyne Entrance; long. 1°14'05"W, lat. 55°1'55"N. HU. 174. R. 24a & b from 73 m, S Forties; long. 0°28'E, lat. 57°25'N. HU. 174. R. 22 from about 25 fathoms, N Sea; approx, long. 1°08'W, lat. 54°53'N. Remarks: This opportunity is taken to correct the synonymy given in Neale 1973 by removing the uncertainty attached to Ruggieri's references. Through the kindness of Professor Ruggieri I have been able to examine some of his material and can confirm that it is indeed the true C. quadridentata. Distribution: The species is widely distributed from Shetland and S Norway to the Bay of Biscay at the present day and occurs more widely in the Pleistocene when it extended from the British area to the Mediterranean. Explanation of Plate 2:46:290 Fig. 1, 9 car., ext. dors. (HU. 90. R. 35, 779 ym long); fig. 2, 9 RV, ext. dors. (HU. 49. R. 2, 792 ym long); fig. 3, d RV, ext. dors. (HU. 49. R. 3, 805 ym long). Scale A (100 ym ; xl25) , fig. 1; scale B (100 ym ; xH9) ( figs. 2, 3. Stereo-Atlas of Ostracod Shells, 2:46:288 Celtia quadridentata (2 of 8) Stereo-Atlas of Ostracod Shells, 2:46:290 Celtia quadridentata (4 of 8) Fig. 1, d L V, ext. lat. (HU. 90. R. 36, 733 ym long; specimen lost); fig. 2, 9 LV, ext. lat. (HU. 174 .R. 24a, 818 ym long). Scale A (100 ym ; xl29), fig. 1; scale B (100 ym , xl!6) , fig. 2. Stereo-Atlas of Ostracod Shells, 2:46:293 Celtia quadridentata (7 of 8) Figs. 1-3, 9 RV (HU. 174. R. 22 , 785 ym long). Fig. 1, int. ant. tooth & buttress; fig. 2, int. ant. obi.; fig. 3, int. lat. Scale A (20 ym ; x650) , fig. 1; scale B (100 ym ; x89) , fig. 2; scale C (100 ym ; xi20) , fig. 3. Stereo-Atlas of Ostracod Shells, 2:47:295 (1975) Mutilus elegantulus (1 of 1) 595.337.14 (118.22) (458.1:161.012.37): 551.35+552.542 ON MUTILUS ELEGANTULUS RUGGIERI AND SYLVESTER- BRADLEY sp. nov. by G. Ruggieri and P. C. Sylvester- Bradley (University of Palermo 3 Italy and University of Leicester 3 England) Mutilus elegantulus sp. nov. non 1878 Cythere retiformis sp. nov. 0. Terquem, Mem. Soc . geol . Fr. , ser. 3, vol . 1, p. 116, pi. 13, figs. 16a-d. 1973 Mutilus retiformis (Terquem, 1878); G. Ruggieri & P. C. Sylvester-Bradley , A Stereo-Atlas of Ostracod Shells, vol. 1, pt. 2, pp. 109-116. Ho lo type ; Brit. Mus. (Nat. Hist.) 10 5546, RV. [Paratypes: 10 5547 (LV) , 10 5548 (LV) , 10 5549 (RV) ] . Type locality; Middle Pliocene (grey marls) of River Modione, near Partanna, Trapani, Sicily; approx, long. 12°50'E, lat. 37°22'N. Diagnosis: Reticulate pattern shown in pi. 110, figs. 1, 4 of Ruggieri & Sylvester- Bradley (op. cit.) diagnostic, more deeply excavated and with narrower muri than in either M . retiformis (Terquem) or M. laticancellatus Neviani (see below) . Remarks: The examination by K. Wouters of the type-specimens of Cythere retiformis has shown that that species has been misidentif ied {Ostracodologist , no. 21, pp. 2-11, 1974). In forthcoming papers K. Wouters, W. Sissingh and ourselves will show that the true C. retiformis is the senior synonym of Mutilus dohrni Uliczny, 1969, and that that species differs both from M. elegantulus sp. nov. and from M. laticancellatus Neviani, 1928 with which species it has previously been confused. Stereo-Atlas of Ostracod Shells, 2:48:296 (1975) Argenticytheretta (Chiliella) (1 of 1) 595.337.14 (118.14) (83:164.071.54+83.164.072.54): 551.351+ 552.522 ON CHILIELLA ROSE nom. nov. by John F. Rose (University of Hull3 England) Genus ARGENTICYTHERETTA Rossi de Garcia, 1969 Subgenus CHILIELLA Rose nom. nov. 1975 Argenticytheretta (Chilea) subgen. nov., J. F. Rose, A Stereo-Atlas of Ostracod Shells, vol. 2, pt. 3, pp. 207-210. Type-species (by original designation): Argenticytheretta (Chilea) hrunswickensis Rose, 1975 Derivation of name: From southern Chile. Remarks: In a recent paper in A Stereo-Atlas of Ostracod Shells (1975, vol. 2, pt. 3, pp. 207-210) I established the subgeneric name Chilea (type- species by original designation Argenticytheretta (Chilea) hrunswickensis sp. nov.) for a new subgenus of Argenticytheretta Rossi de Garcia, 1969. Dr. H. J. Oertli has kindly pointed out (pers. comm.) that Chilea is preoccupied by Chilea Dalman, 1820 (Lepidoptera) . I therefore propose the name Chiliella nom. nov. to replace the junior homonym Chilea Rose, 1975. Stereo-Atlas of Ostracod Shells, 2:49:297-302 (1975) GENERAL INDEX Index, Volume 2, 1974-5 (1 of 6) Ax-Furaih, A. A. F. , On Hornibrookella anna (Lienenklaus) ; 211-214 Al-Furaih, A. A. F., On Paragrenocy there hiclavata Al-Furaih gen. et sp. nov. ; 231-238 ambo , Ogmoconcha; 9-16 anna, Hornibrookella; 211-214 Argenticytheretta (Argenticytheretta) fuegoensis Rose sp. nov.; 199-202 Argenticytheretta (Argenticytheretta) gonzalezi Rose sp. nov.; 191-194 Argenticytheretta (Argenticytheretta) patagoniensis Rose sp. nov.; 181-190 Argenticytheretta (Argenticytheretta) riescoensis Rose sp. nov.; 195-198 Argenticytheretta (Chilea) brunswickensis Rose subgen. et sp. nov.; 207-210, 296 Argenticytheretta (Magallanella) chileana Rose subgen. et sp. nov.; 203-206 aselfingenensis, Bairdia; 5-8 Athersuch, J. , & Ruggieri , G. , On Urocythereis phantastica Athersuch & Ruggieri sp. nov.; 223-230 Bairdia aselfingenensis Lord & Moorley sp. nov. ; 5-8 Bairdia hahni Lord & Moorley sp. nov.; 1-4 Bathycy there vanstraateni Sissingh; 133-140 Benson, R. H. , On Puriana fissispinata Benson & Coleman; 283-286 Benson, R. H. , On Puriana pacifica Benson; 279-282 biclavata , Paragrenocy there; 231-238 bireticulata , Orionina; 61-64 bradiana , Lophocythere (Neurocythere) ; 165-172 brunswickensis, Argenticytheretta (Chilea) ; 207-210, 296 Carbonita corrugata Gregory sp. nov. ; 17-20 carnica, Kelletina; 215-222 Celtia quadr identata (Baird) ; 287-294 (Chilea) brunswickensis , Argenticytheretta; 207-210, 296 chileana, Argenticytheretta (Magallanella) ; 203-206 Chiliella Rose nom. nov. ; 296 Clements, R. G. , On Timiriasevia mackerrowi Bate; 117-124 Cluthia keiji Neale sp. nov.; 141-148 cornuta, Semicytherura; 77-84 corrugata , Carbonita; 17-20 crassa, Micropneumatocy there; 263-266 Cytheretta teshekpukensis Swain; 271-278 Cyprideis torosa (Jones) ; 21-32 Cytherella postdenticulata Oertli; 53-56 Doruk, N. , On Cytherella postdenticulata Oertli; 53-56 On Orionina bireticulata Doruk sp. nov. ; 61-64 On Orionina tegminata Doruk sp. nov.; 57-60 On Semicytherura exudata Doruk sp. nov.; 113-116 On Semicytherura incongruens (G. W. Muller) ; 105-112 On Semicytherura ruggierii (Pucci) ; 101-104 On Semicytherura sulcata (G. W. Muller) ; 93-100 On Triebelina raripila (G. W. Muller) ; 65-68 On Urocythereis favosa (Roemer) ; 33-44 On Urocythereis labyrinthica Uliczny; 49-52 On Urocythereis seminulum (Seguenza) ; 45-48 elegantulus , Mutilus; 295 exempla, Procytheridea ; 247-254 exudata, Semicytherura; 113-116 favosa, Urocythereis; 33-44 fissispinata, Puriana; 283-286 fraudator , Procytheridea; 255-262 fuegoensis, Argenticytheretta (Argenticytheretta) ; 199-202 gonzalezi, Argenticytheretta (Argenticytheretta) ; 191-194 Doruk, N. Doruk , N . Doruk, N. Doruk, N. Doruk, N. Doruk , N . Doruk, N. Doruk, N. Doruk, N. Doruk, N. Gregory, D. , On Carbonita corrugata Gregory sp. hahni, Bairdia; 1-4 Hirschmannia viridis (O. F. Muller); 149-156 Hornibrookella anna (Lienenklaus) ; 211-214 incongruens, Semicytherura; 105-112 Ilyocypris schwarzbachi Kempf; 239-246 nov. ; 17-20 Index, Volume 2, 1974-5 (2 of 6) Stereo-Atlas of Ostracod Shells, 2:49:298 keiji, Cluthia ; 141-148 Kellettina carnica Ruggieri Kempf, E. K. , On Ilyocypris Kilenyi, T. I., & Whittaker, labyrinthica , Urocythereis ; Lophocythere (Lophocy there) Lophocy there (Neurocy there) Lophocythere (Neurocy there) Lord, A. R. , & Moorley, A., Lord, A. R. , & Moorley, A., Lord, A. R. , & Moorley, A. , Lord, A. R. , & Sherrington, Lord, A. R. , & Sherrington, Lord, A. R. , & Sherrington, Lord, A. R. , & Sherrington, 255-262 & Siveter sp. nov. ; 215-222 schwarzbachi Kempf; 239-246 J. E., On Cyprideis torosa (Jones); 21-32 49-52 ostreata (Jones & Sherborn) ; 157-164 bradiana (Jones) ; 165-172 minuta (Peterson) ; 267-270 On Bairdia aselfingensis Lord & Moorley sp. nov. ; 5-8 On Bairdia hahni Lord & Moorley sp. nov.; 1-4 On Ogmoconcha ambo Lord & Moorley sp. nov.; 9-16 P. F., On Lophocythere (Neurocy there ) minuta (Peterson); 267-270 P. F. , On Micropneumatocythere crassa (Peterson); 263-266 P. F., On Procytheridea exempla Peterson; 247-254 P. F., On Procytheridea fraudator Sherrington & Lord sp. nov.; mackerrowi , Timiriasevia; 117-124 (Magallanella) chileana , Argenticytheretta ; 203-206 Mayes, C., On Lophocythere (Lophocythere) ostreata (Jones & Sherborn); 157-164 Mayes, C. , On Lophocythere (Neurocythere) bradiana (Jones); 165-172 Mayes, C. , On Progonocy there stilla Sylvester-Bradley; 173-180 Micropneumatocythere crassa (Peterson) ; 263-266 minuta, Lophocythere (Neurocythere) ; 267-270 Moorley, A., & Lord, A. R. , On Bairdia aselfingenensis Lord & Moorley sp. nov.; 5-8 Moorley, A. , & Lord, A. R. , On Bairdia hahni Lord & Moorley sp. nov. ; 1-4 Moorley, A., & Lord, A. R. , On Ogmoconcha ambo Lord & Moorley sp. nov.; 9-16 Mutilus elegantulus Ruggieri & Sylvester-Bradley sp. nov. ; 295 Neale, J. W. , On Celtia quadridentata (Baird); 287-294 Neale, J. W. , On Cluthia keiji Neale sp. nov.; 141-148 Neale, J. W. , On Cytheretta teshekpukensis Swain; 271-278 Neale, J. W. , On Pennyella pennyi Neale gen. et sp. nov.; 125-132 (Neurocythere) bradiana , Lophocythere ; 165-172 (Neurocythere) minuta, Lophocythere ; 267-270 nigrescens , Semicytherura; 69-76 Ogmoconcha ambo Lord & Moorley sp. nov.; 9-16 Orionina bireticulata Doruk sp. nov.; 61-64 Orionina tegminata Doruk sp. nov.; 57-60 ostreata, Lophocythere (Lophocythere) ; 157-164 pacifica , Puriana ; 279-282 Paragrenocythere biclavata Al-Furaih gen. et sp. nov. ; 231-238 patagoniensis , Argenticytheretta (Argenticytheretta) ; 181-190 Pennyella pennyi Neale gen. et sp. nov.; 125-132 pennyi, Pennyella; 125-132 phantastica , Urocythereis; 223-230 postdenticulata , Cytherella; 53-56 Procytheridea exempla Peterson; 247-254 Procytheridea fraudator Sherrington & Lord sp. nov. ; 255-262 Progonocy there stilla Sylvester-Bradley; 173-180 Puriana fissispinata Benson & Coleman; 283-286 Puriana pacifica Benson; 279-282 quadridentata , Celtia (Baird) ; 287-294 raripila , Triebelina; 65-68 riescoensis , Argenticytheretta (Argenticytheretta) ; 195-198 Rose, J. F., On Argenticytheretta (Argenticytheretta) fuegoensis Rose sp. nov.; 199-202 Rose, J. F., On Argenticytheretta (Argenticytheretta) gonzalezi Rose sp. nov.; 191-194 Rose, J. F., On Argenticytheretta (Argenticytheretta) patagoniensis Rose sp. nov.; 181-190 Rose, J. F., On Argenticytheretta (Argenticytheretta) riescoensis Rose sp. nov.; 195-198 Rose, J. F., On Argenticytheretta (Chilea) brunswickensis Rose subgen. et sp. nov.; 207-210, 296 Rose, J. F., On Argenticytheretta (Magallanella) chileana Rose subgen. et sp. nov.; 203-206 Rose, J. F., On Chiliella Rose nom. nov.; 296 Stereo-Atlas of Ostracod Shells, 2:49:299 Index, Volume 2, 1974-5 (3 of 6) Ruggieri, G. , & Athersuch, J. , On Urocythereis phantastica Athersuch & Ruggieri sp. nov. ; 223-230 Ruggieri, G. 215-222 Ruggieri, G. Bradley sp & Siveter, David J. , On Kellettina carnica Ruggieri & Siveter sp. nov.; & Sylvester-Bradley , P. C., On Mutilus elegantulus Ruggieri & Sylvester- nov. ; 295 ruggierii , Semicytherura ; 101-104 schwarzbachi , Ilyocypris; 239-246 sella, Semicytherura; 85-92 Semicytherura cornuta (Brady) ; 77-84 Semicytherura exu data Doruk sp. nov. ; 113-116 Semicytherura incongruens (G. W. Muller) ; 105-112 Semicytherura nigrescens (Baird) ; 69-76 Semicytherura ruggierii (Pucci) ; 101-104 Semicytherura sella (Sars) ; 85-92 Semicytherura sulcata (G. W. Muller) ; 93-100 seminulum, Urocythereis; 45-48 & Lord, A. R. , On Lophocy there (Neurocy there) minuta (Peterson) ; 267-270 & Lord, A. R. , On Micropneumatocythere crassa (Peterson) ; 263-266 & Lord, A. R. , On Procytheridea exempla Peterson; 247-254 & Lord, A. R. , On Procytheridea fraudator Sherrington & Lord sp. nov.; Sherrington, P. F. Sherrington, P. F. Sherrington, P. F. Sherrington, P. F. 255-262 Sissingh, W. , On Bathycythere vanstraateni Sissingh; 133-140 Siveter, David J. , & Ruggieri, G. , On Kellettina carnica Ruggieri & Siveter sp. nov.; 215-222 stilla, Progonocy there; 173-180 sulcata, Semicytherura; 93-100 Sylvester-Bradley, P. C. , & Ruggieri, G. , On Mutilus elegantulus Ruggieri & Sylvester- Bradley sp. nov. ; 295 tegminata , Orionina; 57-60 teshekpukensis , Cytheretta; 271-278 Timiriasevia mackerrowi Bate; 117-124 torosa, Cyprideis ; 21-32 Triebelina raripila (G. W. Mtiller) ; 65-68 Urocythereis favosa (Roemer) ; 33-44 Urocythereis labyrinthica Uliczny; 49-52 Urocythereis phantastica Athersuch & Ruggieri sp. nov.; 223-230 Urocythereis seminulum (Seguenza) ; 45-48 vanstraateni, Bathycythere; 133-140 viridis, Hirschmannia; 149-156 Whittaker, J. E. , On Hirschmannia viridis (O. F. Muller) ; 149-156 On Semicytherura cornuta (Brady) ; 77-84 On Semicytherura nigrescens (Baird) ; 69-76 On Semicytherura sella (Sars) ; 85-92 & Kilenyi, T. I., On Cyprideis torosa (Jones); 21-32 Whittaker, J. E. Whittaker, J. E. Whittaker, J. E. Whittaker, J. E. INDEX; GEOLOGICAL HORIZON See 1:2:5-22 (1973) for explanation of the Schedules in the Universal Decimal Classification (113.52) Upper Carboniferous: Kellettina carnica; 215-222 (113.522) Coal Measures: Carbonita corrugata; 17-20 (116.212) Pliensbachian : Bairdia aselfingensis; 5-8 Bairdia hahni; 1-4 Ogmoconcha ambo; 9-16 Bathonian : Lophocythere (Lophocy there) ostreata; 157-164 Lophocythere (Neurocy there) bradiana; 165-172 Progonocy there stilla; 173-180 Timiriasevia mackerrowi; 117-124 (116.222) Stereo-Atlas (116.223) (116.333.3) (118. 13) (118.14) (118.15) (118.21) (118.213) (118.213) (118.22) (119.1) (119.2) (119.3) (119.3) of Ostracod Shells, 2:49:300 Index, Volume 2, 1974-5 Callovian : Lophocythere (Neurocy there) minuta; 267-270 Micropneumatocythere crassa; 263-266 Procytheridea exempla ; 247-254 Procytheridea fraudator ; 255-262 Santonian : Pennyella pennyi; 125-132 Palaeocene : Paragrenocy there biclavata ; 231-238 Eocene : Argenticytheretta (Argenticytheretta) patagoniensis ; 181-190 Argenticytheretta (Argenticytheretta) riescoensis ; 195-198 Argenticytheretta (Chilea) brunswickensis ; 207-210, 296 Oligocene : Argenticytheretta (Argenticytheretta) gonzalezi; 191-194 Argenticytheretta (Argenticytheretta) patagoniensis ; 181-190 Argenticytheretta (Magallanella) chileana; 203-206 Hornibrookella anna ; 211-214 Miocene : Argenticytheretta (Argenticytheretta) fuegoensis ; 199-202 Argenticytheretta (Magallanella) chileana; 203-206 Upper Miocene: Orionina bireticullata ; 61-64 Triebelina raripila ; 65-68 Tortonian : Orionina tegminata; 57-60 Urocythereis seminulum; 45-48 Pliocene : Cytherella postdenticulata; 53-56 Mutilus elegantulus ; 295 Semicytherura incongruens ; 105-112 Semicytherura ruggierii; 101-104 Urocythereis favosa; 33-44 Urocythereis labyrinthica; 49-52 Pleistocene : Bathycythere vanstraateni ; 133-140 Cyprideis torosa; 21-32 Cytheretta teshekpukensis ; 271-278 Semicytherura exudata; 113-116 Semicytherura incongruens ; 105-112 Semicytherura ruggierii; 101-104 Semicytherura sulcata; 93-100 Calabrian : Urocythereis labyrinthica; 49-52 Glacial & interglacial: Ilyocypris schwarzbachi ; 239-246 Sicilian : Urocythereis phantastica ; 223-230 Recent : Celtia quadridentata ; 287-294 Cluthia keiji; 141-148 Cyprideis torosa; 21-32 Cytheretta teshekpukensis ; 271-278 Hirschmannia viridis; 149-156 Puriana fissispinata; 283-286 Puriana pacifica; 279-282 Semicytherura cornuta; 77-84 Semicy there nigrescens ; 69-76 Semicytherura sella; 85-92 Triebelina raripila; 65-68 Urocythereis favosa; 33-44 Urocythereis phantastica; 223-230 (4 of 6) (119.9) Stereo-Atlas of Ostracod Shells, 2:49:301 Index, Volume 2, 1974-5 (5 of 6) See 1:2:5- INDEX; GEOGRAPHICAL LOCATION -22 (1973) for explanation of the Schedules in the Universal Decimal Classification (261.26) N Sea: Celtia quadridentata ; 287-294 Semicytherura nigrescens ; 69-76 (261.268) English Channel: Hirschmannia viridis ; 149-156 (261.27) Semicytherura cornuta; 77-84 Semicytherura nigrescens ; 69-76 Semicytherura sella ; 85-92 Irish Sea & western waters of British Isles: (261.273) Semicytherura sella ; 85-92 St. George's Channel & adjacent Welsh & Irish coastal waters: Celtia quadridentata ; 287-294 (261.64) Gulf of Mexico: Puriana fissispinata; 283-286 (262.114) Iberian Sea: Cluthia keiji; 141-148 (262.2) E Mediterranean: Semicytherura exudate-, 113-116 Semicytherura incongruens ; 105-112 Semicytherura ruggierii ; 101-104 Semicytherura sulcata-, 93-100 Urocythereis phantastica; 223-230 (262.3) Adriatic Sea: Bathycythere vanstraateni-, 133-140 (262.4) Aegean Sea: Triebelina raripila-, 65-68 Urocythereis favosa ; 33-44 (265.22) Seas & waters of W Californian & U. S. coasts: Puriana pacifica-, 279-282 (268) Arctic Ocean: Cytheretta teshekpukensis ; 271-278 (422.1) Surrey : Lophocythere (Neurocy there) bradiana-, 165-172 (422.3) Kent : Cyprideis torosa; 21-32 (423.1) Wiltshire : Lophocythere (Neurocythere) bradiana; 165-172 (423.3) Dorset : Cyprideis torosa; 21-32 Lophocythere (Lophocythere) ostreata; 157-164 Progonocy there stilla; 173-180 Semicytherura cornuta; 77-84 Semicytherura nigrescens ; 69-76 Semicytherura sella; 85-92 (423.8) Somerset : (425.72) Lophocythere (Lophocythere) ostreata; 157-164 Progonocythere stilla; 173-180 Oxfordshire : (426.1) Lophocythere (Lophocythere) ostreata; 157-164 Timiriasevia mackerrowi; 117-124 Norfolk : Cyprideis torosa; 21-32 (426.7) Essex : (428.1) Cyprideis torosa; 21-32 Durham : Carbonita corrugata; 17-20 Stereo- Atlas of Ostracod Shells, 2:49:30 2 Index, Volume 2, 1974-5 (6 of 6) (430.1) German Federal Republic: Bairdia aselfingenensis ; 5-8 Bairdia hahni; 1-4 Hornibrookella anna ; 211-214 Ilyocypris schwarzbachi ; 239-246 Ogmoconcha ambo ; 9-16 (45) Italy: Kellettina carnica; 215-222 (454) Piacenza : (457.1) Urocythereis favosa ; 33-44 Aquila : Urocythereis seminulum ; 45-48 (457.5) Calabria : Urocythereis labyrinthica ; 49-52 (458.1) Sicily: Mutilus elegantulus; 295 Urocythereis phantastica ; 223-230 (492) Netherlands : (495.4) Cypridpis torosa; 21-32 Ionian Islands: (532) Urocythereis labyrinthica ; 49-52 Saudi Arabia: (560) Par agrenocy there biclavata-, 231-238 Turkey (Asia) : Cytherella postdenticulata; 53-56 Orionina bireticulata; 61-64 Orionina tegminata'; 57-60 Triebelina raripila; 65-68 Urocythereis favosa ; 33-44 Urocythereis seminulum ; 45-48 (712.4) Saskatchewan: Procytheridea fraudator ; 255-262 (786) Montana : (787) Lophocythere (Neurocy there) minuta ; 267-270 Micropneumatocythere crassa ; 263-266 Procytheridea exempla ; 247-254 Procytheridea fraudator ; 255-262 Wyoming : Procytheridea exempla ; 247-254 (798) Alaska : (83) Cytheretta teshekpukensis ; 271-278 Chile : (941) Argenticytheretta (Argenticytheretta) fuegoensis ; 199-202 Argenticytheretta (Argenticytheretta) gonzalezi ; 191-194 Argenticytheretta (Argenticytheretta ) patagoniensis ; 181-190 Argenticytheretta (Argenticytheretta) riescoensis ; 195-198 Argenticytheretta (Chiilea) brunswickensis ; 207-210, 296 Argenticytheretta (Magallanella) chileana; 203-206 Western Australia: Pennyella penny i; 125-132 A Stereo- Atlas of Ostracod Shells edited by P. C. Sylvester-Bradley and David J. Siveter Volume 2, 1974-5 Part 1 (pp. 1- 68); 29th March, 1974 Part 2 (pp. 69-140); 17th July, 1974 Part 3 (pp. 141-222); 12th August, 1975 Part 4 (pp. 223-302); 30th December, 1975 Published by the Department of Geology in the University of Leicester, England Stereo-Atlas of Ostracod Shells, 2:ii Contents CONTENTS 1 On Bairdia hahni Lord and Moorley sp. nov. ; by A. R. Lord and A. Moorley 1 2 On Bairdia aselfingenensis Lord and Moorley sp. nov.; by A. R. Lord and A. Moorley 5 3 On Ogmooonaha ambo Lord and Moorley sp. nov.; by A. R. Lord and A. Moorley 9 4 On Carbonita corrugata Gregory sp. nov. ; by Diane Gregory 17 5 On Cyprideis torosa (Jones); by T. I. Kilenyi and J. E. Whittaker 21 6 On Uroaythereis favosa (Roemer) ; by N. Doruk 33 7 On Uroaythereis seminulum (Seguenza) ; by N. Doruk 45 8 On Uroaythereis labyrinthiaa Uliczny; by N. Doruk 49 9 On Cytherella postdenticulata Oertli; by N. Doruk 53 10 On Orionina tegminata Doruk sp. nov. ; by N. Doruk 57 11 On Orionina bireticulata Doruk sp. nov.; by N. Doruk 61 12 On Triebelina raripila (G. W. Muller); by N. Doruk 65 13 On Semicytherura nigrescens (Baird); by J. E. Whittaker 69 14 On Semicytherura aomuta (Brady); by J. E. Whittaker 15 On Semiaytherura sella (Sars) ; by J. E. Whittaker 85 16 On Semiaytherura sulcata (G. W. Muller) ; by N. Doruk 93 17 On Semiaytherura ruggierii (Pucci) ; by N. Doruk 101 18 On Semiaytherura incongruens (G. W. Miiller) ; by N. Doruk 105 19 On Semiaytherura exudata Doruk sp. nov.; by N. Doruk 113 20 On Timiriasevia mackerrowi Bate; by R. G. Clements 117 21 On Pennyella pennyi Neale gen. et sp. nov.; by J. W. Neale 125 22 On Bathyay there vanstraateni Sissingh; by W. Sissingh 133 23 On Cluthia keiji Neale sp. nov. ; by J. W. Neale 141 24 On Hirsahmannia viridis (0. F. Muller) ; by J. E. Whittaker 149 25 On Lophoaythere (Lophocy there) ostreata (Jones and Sherbom) ; by C. Mayes 157 26 On Lophoaythere (Neurocy there) bradiana (Jones); by C. Mayes 165 27 On Progonocy there stilla Sylvester-Bradley ; by C. Mayes 173 28 On Argenticytheretta (Argenticytheretta) patagoniensis Rose sp. nov.; by J. F. Rose 181 29 On Argenticytheretta (Argenticytheretta) gonzalezi Rose sp. nov. ; by J. F. Rose 191 30 On Argenticytheretta (Argenticytheretta) riescoensis Rose sp. nov. ; by J. F. Rose 195 31 On Argenticytheretta (Argenticytheretta) fuegoensis Rose sp. nov. ; by J. F. Rose 199 32 On Argenticytheretta (Magallanella) chileana Rose subgen. et sp. nov. ; by J. F. Rose 203 33 On Argenticytheretta (Chilea) brunswickensis Rose subgen. et sp. nov., by J. F. Rose 207 34 On Homibrookella anna (Lienenklaus) ; by A. A. F. Al-Furaih 211 35 On Kellettina camica Ruggieri and Siveter sp. nov. ; by G. Ruggieri and David J. Siveter 215 36 On Urocythereis phantastica Athersuch and Ruggieri sp. nov. ; by J. Athersuch and G. Ruggieri 223 37 On Paragrenocy there biclavata Al-Furaih gen. et sp. nov. ; by A. A. F. Al-Furaih 231 38 On Ilyocypris schwarzbachi Kempf; by E. K. Kempf 239 39 On Procytheridea exempla Peterson; by P. F. Sherrington and A. R. Lord 247 40 On Procytheridea fraudator Sherrington and Lord sp. nov.; by P. F. Sherrington and A. R. Lord 255 41 On Micropneumatocy there crassa (Peterson); by P. F. Sherrington and A. R. Lord 263 42 On Lophoaythere (Neurocy there) minuta (Peterson); P. F. Sherrington and A. R. Lord 267 43 On Cytheretta teshekpukensis Swain; by J. W. Neale 271 44 On Puriana pacifica Benson; by R. H. Benson 279 45 On Puriana fissispinata Benson and Coleman; by R. H. Benson 283 46 On Celtia quadridentata (Baird); by J. W. Neale 28' 47 On Mutilus elegantulus Ruggieri and Sylvester-Bradley sp. nov.; by G. Ruggieri and P. C. Sylvester-Bradley 295 48 On Chiliella Rose nom. nov.; by J. F. Rose -9b 49 Index for Volume 2, 1974-1975 29/ STEREO-ATLAS OF OSTRACOD SHELLS Contents, Volume 2, Part 4 2:36:223-230 On Urocythereis phantastioa Athersuch and Ruggieri sp. nov. ; by J. Athersuch and G. Ruggieri (£0.90) 2:37:231-238 On Par agrenooy there biclavata Al-Furaih gen. et sp. nov.; by A. A. F. Al-Furaih (£0.90) 2:38:239-246 On Ilyoeypris schwarzbachi Kempf; by E. K. Kempf (£0.90) 2:39:247-254 On Prooytheridea exempla Peterson; by P. F. Sherrington and A. R. Lord (£0.90) 2:40:255-262 On Procytheridea fraudator Sherrington and Lord sp. nov.; by P. F. Sherrington and A. R. Lord (£0.90) 2:41:263-266 On Mieropneumatoey there orassa (Peterson); by P. F. Sherrington and A. R. Lord (£0.45) 2:42:267-270 On Lophooythere (Neurocy there) minuta (Peterson); by P. F. Sherrington and A. R. Lord (£0.45) 2:43:271-278 On Cytheretta teshekpukensis Swain, by J. W. Neale (£0.90) 2:44:279-282 On Puriana pacifica Benson; by R. H. Benson (£0.45) 2:45:283-286 On Puriana fissispinata Benson and Coleman; by R. H. Benson (£0.45) 2:46:287-294 On Celtia quadridentata (Baird); by J. W. Neale (£0.90) 2:47:295 On Mutilus elegantulus Ruggieri and Sylvester-Bradley sp. nov.; by G. Ruggieri) and P. C. Sylvester-Bradley ) (£0.30) 2:48:296 On Chiliella Rose nom. nov.; by J. F. Rose ) 2:49:297-302 Index for Volume 2, 1974-1975 (£0.45) Prepaid annual subscription (valid for Volume 3, 1976): £12.00 for 2 Parts Price per Part: £12.00 Back volumes: Vol. 1 (4 Parts): £20.00; price per Part: £5.00 Vol . 2 (4 Parts): £28.00; price per Part: £7.00 Prices of Numbers as shown in Lists of Contents for each Part Postage extra in sales of all back Numbers and back Parts No trade discount is allowed on the subscription rate Orders should be addressed to: Dr. R. H. Bate, Department of Palaeontology, British Museum (Natural History), Cromwell Road, London, SW7 5BD. Cheques should be made payable to Dr. R. H. Bate