bpbthehasieaanan te a er reeen iapesbtbehdbdaater tn ae SAF WEP WNT LE PW rere p2unghtostesarenysens oe een ere gen onesete ee tg gm aE Fahy ante eet we giinag em ener ae we pane aiaiees doeetedaanaie - atone ees enereret eNO waren a ed SEAT , sats HARVARD UNIVERSITY. LIBRARY OF THE MUSEUM OF COMPARATIVE ZOOLOGY. GIFT OF , ALEX. AGASSIZ. “> fi ras ne ie oak: ’ ae B v ay ba i ry ant ne ha New Series, No. 157 (Vol. 40, Part 1). Price 10s. APRIL, 1897. MAY 22 1897 es THE 1s du dererty JOURNAL OF MICROSCOPICAL SCIENCE. EDITED BY EK. RAY LANKESTER, M.A., LL.D., F.RB.S., Linacre Professor of Comparative Anatomy, Fellow of Merton College, and Honorary Fellow of Exeter College, Oxford ; Corresponding Member of the Imperial Academy of Sciences of St. Petersburg, and of the Academy of Sciences of Philadelphia; Foreign Member of the Royal Bohemian Society of Sciences; Associate Member of the Biological Society of Paris. WITH THE CO-OPERATION OF ADAM SEDGWICK, M.A., F.RB.S., Fellow and Lecturer of Trinity College, Cambridge; AND W. F. R. WELDON, M.A., F.B.S., Fodrell Professor of Zoology and Comparative Anatomy in University College, London; late Fellow of St. Fohn’s College, Cambridge. WITH LITHOGRAPHIC PLATES AND ENGRAVINGS ON WOOD. wr a J. & A. CHURCHILL, 7, GREAT MARLBOROUGH STREET. . LONDON: . 1897. ; . ane and Son, \ 77 y (Bartholomew Close. \ ‘ Cae MEMOIRS: The Constitution and Development of the Society of Termit servations on their Habits; with Appendices on the ra Protozoa of Termitide, and on the Embiide (concluded from Vol. 39, p. 315). By Professor B. Grassi in collaboration wit SANDIAS lg ‘ ; : : : a On the Structure of Hydractinia echinata. RGAR CoticuttT, Zoological pas ad University College, I] (With Platel) .. : : : ks On the Histology of the Ovary and ck the Ovarian Ova in I Marine Fishes. By J. T. Cunninexam, M.A.Oxon. Plates 2—4) . . . . * On Ptychodera flava, Eschscholtz. pose! ARTHUR Win (With Plate 5) : aad : : On the Nephridia of the Polycheta. Part 1—On Hesio: | and Nephthys. By Epwin S. Goopricu, B.A., Assistant | Linacre Professor, Oxford. (With Plates6—9) . The Pre-ocular and Post-ocular Tentacles and Osphradia of B By Antuur Witzy, D.Sc. (With Plate 10) haere: On Heteroplana, a New Genus of Planarians. By Sano zi D.Sc. ; . : : New Series, No. 158 (Vol. 40, Part 2). Price 10s. AUGUST, 1897. OCT 21 1897 es QUARTERLY JOURNAL THE MICROSCOPICAL SCIENCE. EDITED BY E. RAY LANKESTER, M.A., LL.D., F.R.S., Linacre Professor of Comparative Anatomy, Fellow of Merton College, and Honorary Fellow of Exeter College, Oxford; Corresponding Member of the Imperial Academy of Sciences of St. Petersburg, and of the Academy of Sciences of Philadelphia; Foreign Member of the Royal Bohemian Society of Sciences; Associate Member of the Biological Society of Paris. WITH THE CO-OPERATION OF ADAM SEDGWICK, M.A., F.B.S., Fellow and Lecturer of Trinity College, Cambridge; AND W. F. R. WELDON, M.A., F.RB.S., Jodrell Professor of Zoology and Comparative Anatomy in tiniest College, London ; late Fellow of St. Fohn’s College, Cambridge. WITH LITHOGRAPHIC PLATES AND ENGRAVINGS ON WOOD. LONDON: J. & A. CHURCHILL, 7, GREAT MARLBOROUGH STREET. 1897. Adlard and Son,] ; ‘ ; , ; (Bartholomew Close. MEMOIRS: cardium and Spermatophores. By AntHUR WILLEY, D.Se, | Platell) . : , : é ; On some Modifications of Structure subservient to Rese ti Decapod Crustacea which burrow in Sand; with some Rem the Utility of Specific Characters in as genus Calappa, description of a new species of Albunea. By Water Ga M.A., Fellow and Lecturer of Lincoln College, Oxford. | Plates 12—14) . ‘ 2 : ee Notes on the Anatomy of Sternaspis. By Ewin 8. Godan C1 Assistant to the Linacre Professor, Oxford. (With and 16) : ; : sae On the Relation of the eae Head to the ° Aiate ] The Adhesive Tentacles of Nautilus, with some Notes on i ; Peri Oxford : : 5 é f On the Development of the Californian Hag-fish, Bd , Stouti, Lockington. s D., | College, N.Y. (Preliminary Note.) (With Plate 17) On the Diplochorda.—1. The Structure of Actinotro C Structure of ty doses By AcJEs aeiaiates FER LY 1898 New Series, No. 159 (Vol. 40, Part 3). Price 10s. DECEMBER, 1897. [ THE QUARTERLY JOURNAL OF MICROSCOPICAL SCIENCE. EDITED BY HK. RAY LANKESTER, M.A., LL.D., F.B.S., Linacre Professor of Comparative Anatomy, Fellow of Merton College, and Honorary Fellow of Exeter College, Oxford; Corresponding Member of the Imperial Academy of Sciences of St. Petersburg, and of the Academy of Sciences of Philadelphia; Foreign Member of the Royal Bohemian Society of Sciences; Associate Member of the Btological Society of Paris. WITH THE CO-OPERATION OF ADAM SEDGWICK, M.A., F.RB.S., Fellow and Tutor of Trinity College, Cambridge; AND W. F. R. WELDON, M.A., F.B.S., Fodrell Professor of Zoology and Comparative Anatomy in University College, London; late Fellow of St. Fohn’s College, Cambridge. WITH LITHOGRAPHIC PLATES AND ENGRAVINGS ON WOOD. J. & ‘i CHURCHILL, 7, GREAT MARLBOROUGH STREET. | LONDON: 1897. Adlard and Son,] hie aig fee ae ——-——= [Bartholomew Close. 4} 4 CONTENTS OF No. 159,—New aon MEMOIRS: Note on a New British Echiuroid Gephyrean, with Remar Genera Thalassema and Hamingia. By W. A. Herp F.R.S., Professor of Natural History in University £ pool. (With Plates 27 and 28) . ‘ oy The Placentation of Perameles. (Contributions to the En the Marsupialia—I). By Jas. P. Hitt, Demonstrator of B 0) the Uaeeernty of Sydney, N.S.W. (With Plates 29 Plates 34—37) FEB 25 1898 New Series, No. 160 (Vol. 40, Part 4). Price 10s. ARY, 1898. 4 59 JANUARY, / THE | QUARTERLY JOURNAL | OF | | | MICROSCOPICAL SCIENCE. | EDITED BY | EK. RAY LANKESTER, M.A., LL.D., F.RB.S., Linacre Professor of Comparative Anatomy, Fellow of Merton College, and Honorary Fellow of Exeter College, Oxford; Corresponding Member of the Imperial Academy of Sciences of St. Petersburg, and of the Academy of Sciences of Philadelphia; Foreign Member of the Royal Bohemian Society of Sciences; Associate Member of the Biological Society of Paris; Fullerian Professor of Physiology in the Royal Institution of London. WITH THE CO-OPERATION OF ADAM SEDGWICK, M.A., F.RB.S., Fellow and Tutor of Trinity College, Cambridge; AND W. F. R. WELDON, M.A., F.R.S., Fodrell Professor of Zoology and Comparative Anatomy in University College, London; late Fellow of St. Fohn’s College, Cambridge. WITH LITHOGRAPHIC PLATES AND ENGRAVINGS ON WOOD. LONDON: J. & A. CHURCHILL, 7, GREAT MARLBOROUGH STREET. 1898. ~~ (Bartholomew Ciose. CONTENTS OF No. 160.—New Series. a MEMOIRS: PAGE Materials for a Monograph of the Ascons. I. On the Origin and Growth of the Triradiate and Quadriradiate Spicules in the Family Clathrinide. By HE. A. Mrvcutn, M.A., Fellow of Merton College, Oxford. (With Plates 38—42) . : ‘ . 469 The Early Development of Amphioxus. By E. W. MacBripsz, M.A., Fellow of St. John’s College, Cambridge ; Professor of Zoology in the McGill University, Montreal. (With Plates 43—45) . . 589 On Drepanidotenia hemignathi, a New Species of Tapeworm. By Artuur EH, Surprey, Fellow and Tutor of Christ’s College, Cambridge, and University Lecturer in the Advanced Morphology of the Invertebrata. (With Plate 46) : . - - 613 Spengelia; a New Genus of Enteropneusta. By ArnTHUR WILLEY, D.Se., Balfour Student of the University of Cambridge. (With Plate 47) . 5 - ; : : ‘ - 623 On a Prorhynchid Turbellarian from Deep Wells in New Zealand. By Witt1am A. Haswett, M.A., D.Sc., F.R.S., Professor of Bio- | logy, Sydney University. (With Plate 48) i : GBS | Note on the Development: of the Atrial Chamber in Amphioxus, By E. Ray Lanxester, M.A., LL.D., F.R.S. . ‘ : . 647 INDEX . : : , ok ca et . 651 TABLE OF CoNTENTs. MC C.ad nat. del. F Huth Litht Edin? Quart Sourn. Moor’ Sei VA 40 NSF, 2. \Y va eee F Huth, Litht Ediné 14 T. Cunningham del ; ‘ oe i ‘e , .. if » ‘ ~ : ‘ ‘fy, T. Cunningham del. J.T Gunningham del. i wa” Wan A CX eg Quart Bourn Mior Sei Wl eae F Huth, Lith? Ed F Huth, Lith? Edin? Willey del acy fay ns : te 8 i's ty we a, : al at Quart Fourn Moor Sei: Vol. 40 NS, 6. rf Fig. 2. c.0. eae. Le. : = : : : Pr J i aay, oye) ‘oD s S) ] ; j j ; * CO —ceeb.corp. airs E.$ Goodrich del TUL... ¥. Huth, Lith” Edin? . Quart Sour Mior Sei: VO 4ONSFt 7 — F.Huth, Lith Edint E.S Goodrich del F-Huth, Lith? Edin? $ Goodrich del E | | | Quart Sourm Mor Sci. VA 4ON SPY, 9 F Huth, Lith? Edin™ Postervor Lobe of mantle reflected over Double series of ....-- dark brown pigment. Dorsad (COL aac ies A Willey del. r= © Quart SournMior’ Se Ve -ONSAR, Hi “4 " ee 8 S 5S Ky hy Sie & ‘20S QDLBIS7A © bar Vi bry Apog wdopnsda y goup qopab “egomyzua 9.L0-9S0a ~~~ ee oppydeo pomqua, [070.L0- oid 2 a2 4 oy 3 3 Lonel ay bat he Riga) : bd2 . DDS QUI ‘ ‘ LendegS0d 3427 a5 pared ‘2S QDuUaL LOMLBTUD 297 L01e2uD gy BRL i so2-- Uk F Huth, Lith® Edin® A Willey del ? JART. JouRN. Micr. Scr. N.S., Vol. 40, Pls 1 Quart. Journ. Micr. Sci. N.S., Vol. 40, Pl. Fig. 20 oO a8) Quart Sourn. Méor Sci. 40NS PY IE F.Huth, Lith? Edin? al Sak E.S. Goodrich del _——— Quare. Bourn Moor Sei. VA40 WSL, IC = WN ee et Ul My) ; : }) | I) mn) Hp) Wh F Huth, Lith? Edin™ E.S.Goodrich del —— lf JNM © N % i a "Sig ee F Huth, Lith™ Edin® Bashford Dean del. 4 ; ey Ps oye Quart, fourm Moor Sa Vb 4ONS.7G 18 ’ "UU; nN F Huth, Litht Edin™ =— Masterman del. Quant Fuurndoor Silt 40 NS. PY, ee, F. Huth, Lith? Edin? Quart Fourn Mior'Sci. Vet 4QNSFY20 F. Huth, Lith? Edin® BP, 27 f SDE. urn Micw Sei: Let. 40 N. &,, eH F. Huth, Lith? Edin? m del. flasterma Saiese seem wine nn a! ¥, DY, 22. a (Z He ° 4 F Huth, Lith? Edint A.T Masterman del. Quart Pourn Moor! Sci. VA 40 NSD? 23. AT. Masterman del. F. Huth, Lith Edin* F Huth, Lith? Edin™ Wir 4ONSDA, 24 Quart Sourn Mir’ Sct: SP — = ’ : ; a be 4 r ‘ aes La 7 . #?. i ‘. So ; 7 ¢ - 5 ae ee ee ee a a " QD pearn Mon Sei Vb 40 NST? ZS: F. Huth, Lith? Edint Quart Sourn Moor Sci. VANS. ex Z iy ri F. Huth, Litht Edin® Sak ar SS i = Se a aa, ; = - " _- i te, SEE — — a —* = a Sea . + 7 : ; ry ‘ ¥ ‘- % » * « . ¢ . a > ~ - ¢ ‘J ‘ - . A ‘ y P td - Sr ee ae Pees - : a | | Quart Bourn Moor Sei VA4H NSB 27 / ] My an co = Cates F Huth, Lith® Edin? W.A.Herdman del. —_~ > ee ero Pee Palins) Quart Sourm Mor’ St. Vi 4O NSE 28 cd. @ exe se Gs G ae eRe. US ce, oes Pe wef SAAN INP a. - | Wer Wn ee : ‘. 49 F Huth, Lith® Edin? Fig.5, FC Wills del F Huth, Lith? Edin® bil, omph’ p Spl. J vib. vase. age s é | Quart Sourn. Mor Sc. VA4ONS GL: IL J.P. Hill, del F Huth, Lith? Edin* JP. Hill, del Fig. 25, FC Wills, del YuareIournMbor Sei VAMUSLY, 83 atl cap. J.P Hil, del. Se areas Phe ae , F Huth, Lith? Edin® Fig. 36,FC Wills ae) eee W.B.Benham del a | ee Quart Sour Mor? Si Va HQusP2, H4 Cheetopterin fresh extracted (neutral ) Acidulated Chetopterin. Alkaline i! Cheetopterin. |. Bonellin (alkaline ) Acidulated Bonellin. h F Huth, Litht Edin? Quart Iourm Moor’ Sei. V1, 40 NSTY, BS Neutral Acid Alkaline CHATOPTERIN. CHATOPTERIN. CHATOPTERIN. (Normal) Leg. &f. Fg. 10 Peg. LL Neutral Acid Alkaline i BONELLIN. BONELLIN. BONELLIN. t; (Normal) R.L. pinxit. F Huth, Lith? Edin? Quart fourn. Mor Sci. VA. 40NS LY, 36. CHAETOPTERIN ee hatine by NaOH in Alcohol 96% 10 52 cai ET og AH ie HUT | al mae Tr at Pe HISHDSPTRUGEHECGHAOETAUGHUDY 710 Wea apn S HINT a a_i iff bydaqed o ett AE AUT AA FUUUUTEUOURUTTRENALATONGQOOOUAEEAEUH HUOAEOOAATPAUUGUTSUOQUHAHHEEUOUASQEOOCSSAAUHUOUNOUOHGBEOOOUOSUOOOSOGQOUOUUGGOOOOIEE SEEEEEEESESEOGE SEREEEROUEE Nee eee eee ree ne RERRERRClGRRRRBGOUGRRnGCee Rese ROGGeRReGeesnenennannee 8 aa INTE ttl tl emt : thi bid | at NH 0 FAAP EU ETTAUL tt! ] < 10 spttrtyted 114 ! © Oy reel : 1] eee EP ey ly hs YO SAAT AIS AIT TSCA ORS eC SASSSCaG SGP SePAGRTSESe BRFSS ssne egw ity aT | HNL setetsssssssessssasssassossoceseeUSSSSSE0EE0000008800 0c O000SRUs000;0s0000500550 00 SEEEESEIZ SETGGUHARERRGGRROTRAATRORORRRRR ORR ROROOEE CECUREA DERE EODS RG ROR ERLE GEES eer > ATT co th DURURRERODR NS REUNEDES + i lis i] slrvii day a ee N et ! j ! 8. hit pa ins i CCT roone SERED ater tt | ri I FE TT HII BUTANE AE < ES SS SS a Se ee 4H a) 395 Bite. Solution. in neutral alcoholic ° ils o) 0 = | \ I} 1} i} j | 56 58 60 oO a ‘ ‘dt HUAUIAUUAOGKUUONOG0GQNNGUORUUONOOADAI? FAVINREOAUAUUAANDE UTS SUSECOUGUETCHCRRORREGRREOE) CRRRSE OCR ORORRSEOGSERRSGORERESL COUUBOROGBES ooh + | Vy Coat AORGEEREEEC CED BERERGRRRORRREAOUREEEE NT Lf ; MUCAUSEEEOGRROAAGOS coxARURERREDILE Cer VJ HUTT TTT == HaOnOGHOHE LI i cchorrilanat be N ! Lt ee Ha = TS Ser endOMITEEFenonesseen tte oes Lam o ll US LTT 2 ALAEAAGEHATAGD OS voQHGRNGUILIGH TELAT EEELTTT ELTA vate ELT HTH | atl LILITH Seg LD . 640 aa lll Hitt Ii Ms l ici FEU ‘ cic ETT ATT TTT 440 G 420 A a H 395 430.7 & ry Tae 4 686.7 718.5 ¥. Huth, Lith? Edin® cq x 6 Engelmann fecit. a? ae pS is be F ra “- ‘4 ra aa > era re 8 eas Peete: & °o _ 1) Ww - nm (ey) “ [0.) © ro) om | | \ Ey Ka a! HUSEEEEEE SEERREEEEEE He dd tt dt ttl dette eEbesneeseee me ES —~ a TTT TTT TTT TTT TTT ET TTT a —] | = Sem UIA NNGAUNGUNUNARDONTNDNGRTONGGIRVONERNGGRENDGGDINGOVONGORONGQOOVOQRNGGUANNGQNOGUONONGUQUONIOU0I 21 " il 1 | 1] tid] OI[OYoo[e [eajneu ut LY MA RROD RRNEOG gn o———— ooo SCTE TAAOOANAREATAO RAG DAGGGOAEREOGHORGGHORRRORNEO OS /URGDOORRERORGOROREOUDUER /DGUROROU0URG0R00C000000 7% = SOGRERRRRRE ee cH ao DUDERRRO GRR GRRD ODER ROUOOARORROGREOAORRORRODEER REO; ADUEOGRORGGOEREDRRGOROUR NHOUROUURROEOI0REGORNE = | a) | i= = = i] = = = i is = = i] = + = i i a I : = = a = —_ i = i i “uotynios | ert | tT tI dha SCGRARGDERCRERRER GEER RRDR CER S SCR REOREER OO RRERERE CUES SOT TTT TTT TT a Hill all IMhinsstt SEER r SRT TTA CE TT TT ee eee SH eT Hill HANAHAN AA DOLTTAUTTAEEENEAAHAAEY TL a HHHGAUULALMAESGHUHIAIITSEFOB STSPESIESESSSEOEARIEDOT mt BORSEENAEAEHEE AUSELISSISGUNGHAGLGATADERAHEREGATEALEERFONTEG STHEIHOHIGLITGte rh cic ji! iit ° ~ i) w >» wm fo) N oo © +) L 0c YU Oth =X Obb SS ae = (eset | ry = aaa. as) | 2 SS = i oe -— fe }+——t—J =] a —= a cent cae cent cae cee ae eee! == == == s6e Up T MT WMH A 0 I Z € Y S 9 z 8 6 OL "%96 TOYOSTy ur Kaa ne Ly | > ——— eee Se eee eae as a en a UTE TRE ETT TEETH ETH ITEUNUENUAAVAUAAAEOAEAA ORAL : : Cid Wee dia RR | n \} \ ' 3 Nee eeeeeeee eee ee eee eens ee nen e eas nennssee nee aaeleelnneeusnseaeeuneseeusue ‘ PS UUIANOUOATAAANOOOENANVOOTTEGGOONUNNATEEAAGOOQBGQUERAODOOAREOOOOEROATAOONADAHGOO | ' PETITE EET TT I at NET fT 0 A EY Ve a | 4 | & td CTT A eT Lg I 108 a TTT TTTH PTET TET TET TTT } 1] | | | | 1 t | | cae UUHUNTTATAUVAAAAHAAMA ill iN | | Hil Bic HUUUERGSCHS0E0CRERSO0REOECOGORESUG00G 000002 0EERR000" 00000 00SER0P ERREECENRSEEOEEETEOOED HH & = TT Pee & ‘Ban anni Hhd4 itt] Pye 2 L aT {} Wal ed DD Ry aii PCa TATA Terry TT TTT ery me IIL alti HM | i | Ij j | | | se | | | | 4 H in eS POT ee PATE G EMANATE ROR AA RARER RRR ER GRERRORSGLURCRRERRRDRGRORORRORGUD te Ly SORES SAREE RARER REARS RSR ERR R RAE? Be SRR e eee RSA eRe RRR ee R eee e Nee Ree eRe e eee eee ee ee eeenekee __ SGT HOP And DEORRURAEH PEE ao Se N i | tH COE DURURERR RRR RORROIRRE 1] | | ) A @ TTT ATE SPLATT NNEA GENEL NMERELEAAERTOYCAUNGKNGTEEUNGRAEERUNGUAGHONERNAGAOGDERNEUDNGREGAAGUNGUOGUGUUGENI ae / | rg SERELORR OR LRRLRGE ROARS CARRERE eS CARRERA ROR ER CURR A RACER RRR HORA ARERR RARE RRR EL RR RROR SPER BOER ERIREE POE a et - 4q ll ll HUTT TTL TT UTTER | MMMM TAU hs PO LVUNNNINUDANNNGNARATTAGRUGGDARNGHNGGNGNEGAVNGNONEEAOGGNENERDGQNVGRNODNGUNGDNGNNGQROGDENGGUUNNEA FPA LIALINANADAADAGNGUAHEETNGSDOBUGHUOGDNGDEGNN G22 SinQANENVENNOUEGNPOAVENVONNNNANOQBQVNGNROVNQNINIGN ig es SP RE SEEE DOR EREEEE ROHR SE REOEEEE REE EEEEEEEEOEA® Sau GREELEEECURSESEECRCEREREEEE vf halal ee SPU UUIANUNNAAGVAANGREDNENNGANOSNGQNGANNGQ® \ bas formcall. sext gastractbhl. “fLep E- -gastr act. bl. #...gastract. bl. 24, -apic.torm.cell. Fee =: -bastorm.cell. F-Dastorm) |, ~ cell apic.form.cell. + . gastract.bl. © ( in i trad. syst. | --gastr ray. Pasioncel: \apic form cell. trirad syst. Lith.Werner&Winier, Frankfort°M. ee ee a4 7 7 Quart, fourm Mor Su. VA40.NS. Di.44. apic.farmacell. f basformcell. — gastractbl. POCE op col.cell. Ss _gastract. bl. derm.ap tae @ “sptc.cell E.A.M. del <=; === SS a SO ~~ ae ”_-k Se See Lith Werner &Winter, Frankfort. a tii i . oe ay ea ete - 2 he tit on i Ne Te eld a aaah Aik tee et adie eines eatin aie len ht el J : oe 4 arate “a et ; Tite -. . " = oe 7 re he ow) ; 7) ° Quart Zour MucrSa. Vit40 NS J 1 49 ij gastrract.bl. Ce \ ) K : | ‘ “ ES } —, . ». £m trirad syst. RN col.cells. Ee | M aa, peste -gastract.bl. Z . @ PS of eens | trirad. syst. ; ace 2 ae E.A.M. del. lith Werner & Winter, Frankfort°M. a, ite fT ab 4 © tl Quart fourm Moor St.W40 WEP AB ~~ somite canal notochoradal groove F Huth, Lith? Edi? M¢ Bride del Quart Fourn. Moor Sei. Vol NEFA 44. Neply ------ Prakora pit -- MS Bride del F. Huth, Lith’ Edin? wae es Sea a i ee as ie A - ” iv t ee ee | = = ode mete ae ® paella —- 2 ce | QuartSourn. Mor Sci VANS. GY 48, Collar cavity Gilstad Collar caueey Fig. 28 b. Collar cavity in Atrial folds ( ees Atrial cavity Cavity of Metapleurat fold Fig. Py = Collar cavity > ay Gar a, a y i ae Vd? F- 2 ree MAHAL LA LOLI ALI IDG IIe = —— —_ — ons ~ Sa a ———S 3 AMPHIOXUS. ; es Tr UW) === Froboseis cavity (tele Boeiy Cawley AMPHIOXUS. -}----- Collar cavity Fig. 28. Fig. 26. --ff------ Trunk cavity = = BALANOGLOSSUS. Probes cone MS Bride del BALANOGLOSSUS. F Huth, Litht Bint . a al [ . . =e. Z : >» ¥ * 1 , \ ‘ . i . i : ; af 4 ie t- van ee ‘ _ ie ’ —y Shipley del 7 F. Huth, Lith? Edin™ Sci: TH 4ONSPY, 47, arp A) yal. For Mu vid Ses Se ee ee = 7 ATT aa , ’ . <= eS) ® } SEN RB) . . ‘ ee aT = wat ; —— SS ee y ) @ (2) © @ ) ® @ @ ; =i ee DL ae ae ai scheme aie Tes A Willey del. LuartFourn Mor’ Si V4 WSIS Be Reser ss: WWEBSeees Seeel eS aes Edin® F. Huth, Lith? Sw LT Fan's iyi. ; ey. De } ay ~ i Pa cad! fh) ne: vat A. 4c Me a% nee : QU OU NOEL Date Due BEG-34-1996 ~* Ae nee ee te yng Nee te ae) eh ewig rn UE, yea was + Seate te ay ngemerte ony Pweg ee a ere 7 SO rn tatters oe BOOT eee timwege ne Aye Aho tee ns ela ewe see 4A ee Se ee ee ee Ay newest enon - a OER ey ee OS eB HE We ERNENRN He MEER s HHO werden) ewega eee oe ne waar eee tReet ewtee MyAy Syn Sie eeengees ete LUNE e ne we eras. s ogaune ee RO RE a re a eg ny aE Yam yee en ns wane au tenennein es mega tes SESE Oe A et eS Gat ag Ae eNO Tt eR HE EES EEE tN Eel tweeey Re reek trey neater bub (pie ie Oa mong BETO AO ONO Came tee so erty ume geyr ee Lye O eerie rae sas t Niemi a eRe 5 OEE IMENT 42 aE pmure ge eens hed Seppe airman aaabtermmrioimee natin ~ Po OEE Ce EO As LO OED Oh AO Ri CO, ON OEE HY LOO OL OO Geek Hs eh Twee Swe eke tee