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Full text of "The British parasitic Copepoda"

yfOAt'^jz^ ^Jhvt/ 



THE 



KAY SOCIETY. 



INSTITUTED MDCCCXLIV. 




issued to the Subscribers to the Ray Society for 
the Year 1913. 



LONDON: 
MCMXIII. 




yt& THE 

BRITISH 

PARASITIC COPEPODA 



THOMAS SCOTT, LL.D., F.L.S. 

AND 

ANDREW SCOTT, A.L.S. 

VOLUME II 

COPEPODA PARASITIC ON FISHES 

PLATES 



LONDON 
PRINTED FOR THE RAY SOCIETY 

AND SOLD BY 

DULAU & CO., LTD., 37, SOHO SQUARE, W. 
1913 



PRINTED BY ADLARD AND SON 
LONDON AND DORKING 



^HSO/V^ 

DEC! 1953 



■X 



V\V, 



THE AUTHORS 

DESIRE, WITH THE MOST SINCERE RESPECT, 

TO DEDICATE THIS WORK 

TO THE 

KEY. CANON A. M. NORMAN, MA. 

D.C.L., LL.D., E.R.S., E.L.S., ETC., 

IN GRATITUDE FOR HIS UNFAILING 

KINDNESS AND ASSISTANCE 

EXTENDED TO THEM FOR MANY TEARS. 



NOTE BY THOMAS SCOTT. 

All the figures, unless otherwise described, have been prepared by my 
son, Andrew Scott, from specimens examined by the authors. 

The illustrations have all been engraved by Andre & Sleigh, Ltd., of 
Bushey, Watford. 



LIST OF THE PLATES. 



Plate I. 

Fig. 1. — Ergasilus nanus 

2. — Bomolochus zeugopteri 
3. — B. soleie 
4. — B. onosi 



Plate II. 

1-5. — Ergasilus nanus 
6-9. — Bomolochus soleee 

Plate III. 

1-4. — Bomolochus soleee 

5-7. — B. onosi 

8, 9. — B. zeugopteri 

Plate IV. 

1, 2. — Caligus minimus 
3-8. — C. rapax 

Plate V. 

1-3. — Caligus centrodonti 
4, 5. — C. labracis 

Plate VI. 

1, 2. — Caligus rapax 

3. — C. brevicaudatus 
4, 5. — Lepeophtheirus hippo- 
glossi 

Plate VII. 

1. — Caligus zei 

2, 3. — C. pelamydis 



Plate VIII. 

Fig. 1,2. — Caligus gurnardi 
„ 3-9.— C. zei 
„ 10, 11. — C. brevicaudatus 

Plate IX. 

Fig. 1-5. — Caligus pelamydis 
„ 6-9. — Pseudocaligus brevi- 
pedes 

Plate X. 



Fig. 1, 2. — Pseudocaligus brevi- 
pedes 
„ 3, 4. — Lepeophtheirus pecto- 
ralis 

Plate XL 

Fig. 1-6. — Scizenop>hilus tennis 

Plate XII. 



Fig. 



1. — Bepeophtheirus norcl- 
manni 
2, 3. — L. pectoralis 
4, 5. — Bemoleus paradox%is 

Plate XIII. 



Fig. 1-4. — Lepeophtheirus pecto- 
ralis 

Plate XIV. 

Fig. 1-10. — Lepeophtheirus pecto- 
ralis 



LIST OF THE PLATES. 



Plate XV. 

Fig. 1-9. — Lepeophtheirus pecto- 
ralis 

Plate XVI. 

Fig. 1-3. — Lepeoplitheirus pecto- 
ralis 
„ 4-11. — L. nordmanni 

Plate XVII. 
Fig. 1. — Caligus diaphanus 
„ 2. — Lepeophtheirus hippo- 

gloss i 
,, 3. — L. thompsoni 

„ 4. — L. salmonis 

5, 6. — L. pollachii 



Fig 



Fig 



Plate XVIII. 

1-3. — Caligus centrodonti 
4, 5. — C. labracis 
6, 7. — C. diaphanus 
8-10. — Lepeophtheirus hippo- 
glossi 
11, 12. — L. salmonis 
13-15. — L. pollachii 
16-19. — L. sturionis 

Plate XIX. 

1-9. — Liitkenia asterodermi 
10. — Elytrophora brachy- 
ptera 
11-18. — Phyllothreus cornutus 



Plate XX. 

Fig. 1-8. — Nogaus ambiguus 
„ 9. — Chondracantlius annu- 

latus 
„ 10. — C. merluccii 

Plate XXI. 

Fig. 1. — Lepeophtheirus sturi- 
onis 
„ 2. — Pandarus bicolor 

„ 3, 4. — Cecrops latreillii 
„ 5. — Orthagoriscicola muri- 

cata 



Plate XXII. 

Fig. 1, 2. — Trebius caudatus 
„ 3. — Dinemoura producta 

,, 4. — Echthrogaleus coleop- 

trains 
,, 5, 6. — Pandarus bicolor 

Plate XXIII. 

Fig. 1, 2. — Elytrophora brachy- 
ptera 
,, 3. — Phyllothreus cornutus 

„ 4. — Liitkenia asterodermi 

„ 5,6. — A nthosoma crassu m 

Plate XXIV. 

Fig. 1,2. — Caligus curtus 
„ 3,4:. — Philorthragoriscus ser- 
ratus 

Plate XXV. 

Fig. 1-6. — Thersitina gasterostei 
„ 7-9. — Caligus curtus 
„ 10. — Lepeophtheirus thomp- 

soni 
,, 11-16. — Caligus minimus 

Plate XXVI. 

Fig. 1-3. — Dinemoura producta 
4-19. — Pandarus bicolor 

Plate XXVI l. 

Fig. 1-8. — Dinemoura producta 
,, 9, 10. — Cecrops latreillii 
,, 11-24. — Philorthragoriscus ser- 
ratus 

Plate XXVIII. 

Fig. 1-7. — Cecrops latreillii 
,, 8-18. — Orthagoriscicola mnri- 
cata 

Plate XXIX. 

Fig. 1. — Echthrogaleus liitkeni 
„ 2-5. — Lernanthropus krbyeri 



LIST OF THE PLATES. 



Plate XXX. 

Fig. 1-8. — Echthrogaleus Uitkeni 
9-17. — Lernanthropus hroyeri 

Plate XXXI. 

Fig. 1-6. — Elytrophora brachy- 
ptera 
7-18. — Dichelestium oblongum 

Plate XXXII. 
Pig. 1-11. — Hatschehia mulli 

Plate XXXIII. 

Pig. 1. — Hatschehia cluthse 
2. — H. labracis 
3, 4. — H. hippoglossi 

5. — Thysanote impudica 
6. — ? Lemseopoda lampri 

Plate XXXIY. 

Fig. 1-5. — Hatschehia cluthse 

6, 7. — H. labracis 

8-11. — H. hippoglossi 

Plate XXXV. 

Pig. 1, 2. — Hatschehia cornigera 
„ 3-7. — H. pygmsea 

Plate XXXVI. 

Fig. 1-5. — Hatschehia cornigera 
„ 6-9. — H. pygmsea 

Plate XXXVII. 

Fig. 1. — Euclactylina acuta 

„ 2, 3. — E. acanthii 

„ 4,5. — E. similis 

„ 6, 7. — E. minuta 

Plate XXXVIII. 

Fig. 1-5. — Eudactylina acuta 
„ 6-12. — E. acanthii 



Fig. 

Fig. 

Fig. 

Fig. 
Fig. 
Fig. 



Plate XXXIX. 
1-17. — Eudactylina similis 

Plate XL. 
1-9. — Eudactylina minuta 

Plate XLI. 
1. — Congericola pallida 
2-4. — Chrondr acanthus de- 



Fist. 



Fig. 



Fig. 



5. — G. zei 

6. — C. ornatus 

Plate XLII. 

1-8. — Lernsea branchialis 

Plate XLIII. 
1-7. — Lernsea branchialis 

Plate XLIV. 

1, 2. — Lernsea lusci 
3. — L. minuta 

4. — L. lumpi 
5-7. — Hsemobaphes cyclo- 
pterina 
8. — Hsemobaphoicles am- 
biguus 

Plate XLV. 

1. — Bebelula edwardsi 

2, 3. — Philichthys xiphise 

4, 5.— Dichelestium oblongum 
6. — Tripaphylus musteli 
7. — Ghonch -acanthus orna- 
tus 
8. — Brachiella rostrata 

Plate XLVI. 

1-5. — LernBsenicus sprattie 
6-9. — i. encrasicola 

Plate XLVII. 

1, 2. — Ghondt -acanthus cor- 
nutus 
3. — G. anmdatus 



LIST OF THE PLATES. 



Plate XLVII — continued. 



Fig. 



Fk 



4. — Chondr acanthus solese 
5. — C. Jlurse 
6. — C. limandse 
7. — C. clavatus 
8. — C. merluccii 

Plate XL VIII. 

1-3. — Lepeophtheirus thomp- 

soni 
4, 5. — L. pollachii 
6. — L. brevicaudatus 
7. — Caligus diaphamis 
8-12. — Lernseopoda salmonea 
13-16 — Chondr acanthus nodo- 
szis 
17. — Ergasilus nanus 
18. — Brachiella insidiosa 



Plate XLIX. 

Fig. 1-7. — Tripaphylus musteli 
„ 8-11. — Thysanote impudica 
„ 12-16. — (?) Lernseopoda lampri 



Plate L. 

1-5. — Lerneocera cyprinacea 
6-8. — Achtheres percartim 
9. — Brachiella bispinosa 



Ym. 



FlL 



Fig. 



Plate LI. 

1. — Tripaphylus musteli 
2. — Pennella orthagorisci 
4. — Sphyrion lumpi 
5. — Rebelula edwardsi 
6. — Thersitina gasterostei 
7. — Clavella lophii 

Plate LII. 

-3. — Chondr acanthus nodo- 

sus 
4. — C. lophii 
5. — G. cornutus 
6. — Medesicaste 



Plate LIII. 

Fig. 1-9. — ChondracantJms cor- 
nutus 
„ 10,11.— G. jlurse 
„ 12-15.— G. solete 
„ 16-19.^ — C. merluccii 

Plate LIV. 

Fig. 1-11. — Trebius caudatus 
,, 12-17. — Charopintis dalmanni 
„ 18-22. — C. ramostis 



Plate LV. 



Fiff. 1 



Fig 



4. — Charopinus dalmanni 
„ 5. — G. dubius 

„ 6, 7. — C. ramosus 

Plate LVI. 

Fig. 1-7. — Chondr acanthus de- 
pressus 
8-10. — C. annulatus 
11, 12. — C. limandx 

13. — G. zei 
14, 15. — C. clavatus 
16-18.— C. lophii 

Plate LYII. 

1-7. — Lernseopoda cluthse 
„ 8-12. — L. bidiscalis 
„ 13-17. — L. elongata 
„ 18, 19. — Medesicaste asellimim 

Plate LVIII. 

Fig. 1-8. — Pandarus bicolor 
„ 9-15. — Lernxopoda galei 
„ 16. — L. cluthai 

Plate LIX. 

Fig. 1-6. — Lernseopoda salmonea 
„ 7, 8. — Achtheres percarum 

Plate LX. 

Fig. 1-3. — Lernseopoda cluthse 
„ 4-6. — L. galei 
„ 7. — Brachiella ovalis 



LIST OF THE PLATES. 



Plate LXI. 

Fig. 1,2. — Lemseopoda bidis- 
calis 
3, 4. — L. elongata 
„ 5, 6. — L. similis 

Plate LXII. 

Fig. 1. — Brachiella trigla 
„ 2. — B. insidiosa 

„ 3. — B. rostrata 

„ 4, 5. — B. nierluccii 

Plate LXIII. 

Pig. 1. — Lernseopoda galei 
,, 2-8. — Brachiella rostrata 
„ 9-16. — B. insidiosa 
„ 17-20. — B. merluccii 
„ 21-25.— B. triglse 
„ 26-30.— B. 



Fig. 



Fig. 



Plate LX1Y. 

1-3. — Achiheres percarum 
4-6. — Brachiella thynni 

7. — B. parheri 

8. — B. pastinaca, 

9. — B. bispinosa 

Plate LXV. 

1. — Clavella brevicollis 
2, 3. — G. uncinate/, 
4, 5. — C. rugosa 

6. — C. (?) uncinata 

7. — C. dubia 
8, 9.—C. stellata 



Pl^te LXVI. 

Fig. 1-7. — Clavella rugosa 
„ 8-11.— C. dubia 
„ 12-16. — C. brevicollis 
„ 17-20. — C. emarginata 
„ 21-23. — C. uncinata 

Plate LXVII. 

Fig. 1-3. — Clavella scombri 
„ 4-6. — C. paradoxa 

Plate LXVIII. 

Fig. 1-7. — Clavella scombri 
„ 8-14. — C. paradoxa 
„ 15. — C. quadrata 

Plate LXIX. 

Fig. 1-3. — Clavella canthari 
„ 4-6. — C. alata 
„ 7. — C. emarginata 

Plate LXX. 
Fig. 1-13. — Kroyeria lineata 

Plate LXXI. 

Fig. 1-12. — Eudactylina insolens 
„ 13. — Brachiella pastinaca 

„ 14. — Caligus pelamydis 

Plate LXXII. 
Fig. 1-10. — Argulus foliaceus 



(xii) 



REFERENCE LETTERS TO PLATES IV, XII-XV, 
XLIL and XLIII. 



a. antennules. 


o. ovary. 


a\ antennae. 


od. oviduct. 


an. anus. 


oe. oesophagus. 


b. median frontal sucker. 


os. ovisac. 


c. filament duct. 


p 1 . first pair of feet. 


eg. cement gland. 


p". second pair of feet. 


dg. digestive gland. 


p m . third pair of feet. 


e. eyes. 


p> XT . fourth pair of feet. 


/. filament. 


p v . fifth pair of feet. 


g. ganglia. 


p xl . sixth pair of feet. 


i. intestine. 


rs. receptaculum seminis. 


Is. lateral frontal sucker. 


rt. rectum. 


Ins. lens. 


rtn. retina. 


m. mouth. 


s. stomach. 


md. mandible. 


sbg. sub-cesophageal ganglion. 


mx. first maxilla. 


spg. supra-cesophageal ganglion. 


mx 1 . second maxilla. 


sp. spermatophore. 


mxp. first maxilliped. 


t. testis. 


mxp 1 . second maxilliped. 


u. vulva. 


n. nerves. 


vd. vas deferens. 


Xos. 1-13, Xerve 


3, AS FOLLOWS : — 


1. optic. 


9. first maxillipeds. 


2. antennules. 


10. second maxillipeds. 


3. antennae. 


11. first feet and stomach muscles 


4. mandibles. 


12. second feet and posterioi 


5. lateral frontal margins. 


cephalic muscles. 


6. first maxillae. 


13. third feet, fourth feet, fiftl 


7. second maxillae. 


feet, genital segment, am 


8. lateral cephalic muscles. 


abdomen. 



Plate 1 



Plate I. 

Figs. 

1. Ergasilus nanus P. J. van Beneden, ? , dorsal view, x 51. 

(p. 34.) 

2. Bomolochus zeugopteri T. Scott, ? , dorsal view, x 44. 

(p. 40.) 

3. Bomolochus solese Claus, ? , dorsal view, x 24. (p. 36.) 

4. Bomolochus onosi T. Scott, ? , dorsal view, x 48. (p. 39.) 

[Note. — At page 30, vol. I (text), after Ergasilus nanus 
read P. J. van Beneden instead of Claus.] 



PLATE I 




Plate 2 






Plate II. 

Figs. 

1-5. Ergasilus nanus P. J. van Beneden, $ . (p. 34.) 

1. Antennule. 

2. Foot of first pair. 

3. Foot of third pair. 

4. Foot of fourth pair. 

5. Abdomen. 

6-9. Bomolochas solese Claus, ? . (p. 36.) 

6. Mandible. 

7. First maxilliped. 

8. Foot of second pair. 

9. Foot of fourth pair. 

(Figures much enlarged.) 



Plate 3 



Plate III. 

Pigs. 

1-4. Bomolochus solese Claus, ? . (p. 36.) 

1. Antennule. 

2. Maxilla. 

3. Second maxilliped. 

4. Foot of first pair. 

5-7. Bomolochus onosi T. Scott, (p. 39.) 

5. Antennule, ? . 

6. Second maxilliped, ? . 

7. Second maxilliped, $ . 

8, 9. Bomolochus zeugopteri T. Scott, £ . (p. 40.) 

8. Antennule. 

9. Second maxilliped. 

(Figures much enlarged.) 



PLATE III 




Plate 4 



Plate IV. 

Fios. 

1, 2. Caligus minimus Otto. (p. 46.) 

1. Dorsal view, ? , x 11. 

2. Dorsal view, (J, x 11. 

3-8. Caligus rapax M. Edwards, (p. 48.) 

3. Early " chalimus " stage attached to fin-ray of a 

young cod, x 54. 

4. Late " chalimus " stage attached to tail of a young 

lumpsucker, x 15. 

5. Mature part of a frontal plate, shewing lateral 

sucker {lunula). 

6. Sternal fork, ? . 

7. Second maxilliped, ? . 

8. Foot of fourth pair, ? . 

(Figures 5-8 much enlarged.) 



PLATE IV 




Plate 5 



Plate V. 

Figs. 

1-3. Caligus centrodonti Baird. (p. 50.) 

1. Dorsal view, $ . (After C. B. Wilson.) 

2. Dorsal view, <$ , x 16. 

3. Dorsal view of a young individual, $ , x 16. 
4, 5. Caligus labracis T. Scott, (p. 53.) 

4. Dorsal view, ? , x 21. 

5. Dorsal view, <$ , x 21. 



PLATE V 




Plate 6 



Plate VI. 

Figs. 

1, 2. Caligus rapax M. Edwards, (p. 48.) 

1. Dorsal view, ?, x 13. 

2. Dorsal view, <$ , x 13. 

3. Caligus brevicaudatus A. Scott, (p. 56.) 

3. Dorsal view, ? , x 16. 

4, 5. Lepeophtheirus hippoglossi (Kroyer). (p. 67.) 

4. Dorsal view, $ , x 5. 

5. Dorsal view, <$ , x 7 - 5. 



PLATE VI 




Plate 7 



Plate VII. 

Figs. 

1. Caligus zei Norman & T. Scott, (p. 54. 

1. Dorsal view, ? , x 11. 

2, 3. Caligus pelamydis Kroyer. (p. 57.) 

2. Dorsal view, $ , x 22-5 

3. Sternal fork, ? (enlarged). 



PLATE VII 






Plate 8 



Plate VIII. 

FlGB. 

1, 2. Caligus gumardi Kroyer. (p. 52.) 

1. Dorsal view, £ , x 8. (After Kroyer.) 

2. Dorsal view, ? , x 8. (After Kroyer.) 
3-9. Caligus zei Norman & T. Scott, ? . (p. 54.) 

3. Antennule. 

4. Antenna. 

5. Sternal fork. 

6. First maxilliped. 

7. Second maxilliped. 

8. Foot of fourth pair. 

9. Urosome, $ . 

10, 11. Caligus brevicaudatus A. Scott, ? . (p. 56.) 

10. Second maxilliped, ? . 

11. Foot of fourth pair, ?. 

(Figures 3-11 much enlarged.) 



PLATE VIII 




Plate 9 



Plate IX. 

Figs. 

1-5. Galigus pelamydis Kroyer, ? . (p. 57.) 

1. Antennule. 

2. Antenna. 

3. First maxilliped. 

4. Second maxilliped. 

5. Foot of fourth pair. 

6-9. Pseudocaligns brevipedes (Bassett- Smith), (p. 61. 

6. Sternal fork, ? . 

7. Sternal fork, <£ . 

8. Second maxilliped, $ . 

9. Foot of fourth pair, ? . 

(Figures much enlarged.) 



PLATE IX 




Plate 10 



Plate X. 

Figs. 

1,2. Pseudocaligus brevipedes (Bassett-Smith). (p. 61.) 

1. Dorsal view, ?, x 22. 

2. Dorsal view, <$ , x 22. 

3,4. Lepeophtheirus pectoralis (0. F. Miiller). (p. 64.) 

3. Dorsal view, ? , x 17. 

4. Dorsal view, <$ , x 17. 



PLATE X 




Plate 11 



Figs. 

1-6. 



Plate XI. 

Scisenophilus tenuis P. J. van Beneden, $ . (p. 63.) 

1. Dorsal view (natural size). 

2. Dorsal view (enlarged). 

3. Dorsal view (cephalothorax only). 

4. Ventral view (cephalotnorax, right half only). 

5. Mandible. 

6. Caudal rami. 

(After P. J. van Beneden.) 



PLATE XI 




Plate 12 



Plate XII. 

Figs. 

1. Lepeophtheirus nordmanni (M. Edwards), (p. 66.) 

1. Dorsal view, ? , x 9. 

2,3. Lepeophtheirus pectoralis (0. F. Miiller). (p. 64.) 

2. Newly hatched nauplius, x 52. 

3. " Chalimus " stage, x 26. 

4,5. Demoleus paradoxus (Otto), (p. 79.) 

4. Ventral view, ? . (After Otto.) 

5. Ventral view, $ . (After Otto.) 

(Figures 4 and 5 enlarged.) 



PLATE XII 




Plate 13 



Plate XIII. 

Figs. 

1-4. Lepeophtheirus pectoralis (0. F. Miiller), ?. (pp. 9-18 
and 64.) 

1. Ventral view, shewing the various appendages and 

their muscles, x 17. 

2. Dorsal view, shewing the dorsal muscles, x 17. 

3. Ventral view, shewing the alimentary canal and 

digestive glands, x 17. 

4. Ventral view, shewing the nervous system in situ, 

x 17. 



PLATE XIII 




Plate 14 



Plate XIV. 

Figs. 

1-10. Lepeophtheirus pect oralis (0. F. Miiller). (pp. 9-18 
and 64.) 

1. Ventral view, shewing the reproductive organs, 

?, x 17. 

2. Genital segment and abdomen, ? , immature. 

3. Ventral view, shewing the reproductive organs, 

<?, x 17. 

4. Longitudinal section of the ovary. 

5. Transverse section through genital segment, ¥ , 

mature. 

6. Transverse section through genital segment, <$ , 

mature. 

7. Left anterior digestive gland. 

8. Mouth from the anterior surface, shewing the 

mandibles in situ, and the ducts from the right 
and left anterior digestive glands. 

9. Spermatophores detached from the genital 

openings of a female. 
10. Median longitudinal section of the ganglia, shew- 
ing the "pinhole" oesophagus passing through 
between the supra- and sub-cesophageal parts. 

(Figures much enlarged.) 



PLATE XIV 




Plate 15 






Plate XV. 

Figs. 

1-9. Lepeophtheirus pectoralis (O. F. Muller), ? . (pp. 9-18 
and 46.) 

1. Neaily median longitudinal section. 

2. Part of transverse section of the intestine. 

3. Horizontal section of the supra-cesophageal gan- 

glion, shewing the crossing of the fibres of the 
optic nerves. 

4. Transverse section of the eyes. 

5. One of the antennules, shewing the nerve endings. 

6. Transverse section in the region of the supra- and 

sub-cesophageal ganglia. 

7. Transverse section in the region of the eyes. 

8. Transverse section in the region of the second 

maxillipeds. 

9. The nervous system from the ventral aspect. 

(Figures much enlarged.) 



Plate 16 



Plate XVI. 

Figs. 
1-3. Lepeophtheirus pectoralis (0. F. Miiller), ? . (p. 64.) 

1. Sternal fork. 

2. Second maxilliped. 

3. Foot of fourth pair. 

4-11. Lepeophtheirus nordmanni (M.Edwards), ? & $ . (p 
66.) 
Dorsal view. (This figure after C. B. Wilson/ 
Antenna. 
Sternal fork. 
Second maxilliped. 
Foot of fourth pair. 
Sternal fork. 
Second maxilliped. 
Foot of fourth pair. 

(The last three figures are from a second specimen.) 



4. 


<$ 


5. 


? 


6. 


? 


7. 


? 


8. 


? 


9. 


$ 


10. 


? 


11. 


? 



PLATE XVI 






V 



'I ** 




Plate 17 






Figs. 
1. 



Plate XVII. 

diaphanus Nordmann. (p. 60.) 

1. Dorsal view, ? , x 13. 
Lepeophtheirus hippoglossi (Kroyer). (p. -67.) 

2. Dorsal view, ? immature. 
Lepeophtheirus thompsoni Baird. (p. 69.) 

3. Dorsal view, ? , x 8-75. 
Lepeophtheirus salmonis (Kroyer). (p. 71.) 

4. Dorsal view, $ , x 4. 
Lepeophtheirus pollachii Bassett-Smith. (p. 73. 

5. Dorsal view, J, x 10. 

6. Dorsal view, $ , x 13. 






PLATE XVII 




Plate 18 



Plate XVIII. 

Galigus centrodonti Baird, ? . (p. 50.) 

1. Sternal fork. 

2. Second maxilliped. 

3. Foot of fourth pair. 
Galigus labracis T. Scott, ? . (p. 53.) 

4. Sternal fork. 

5. Foot of fourth pair. 
Galigus diaphanus Nordmann, ? . (p. 60.) 

6. Second maxilliped. 

7. Foot of foui'th pair. 
Lepeophtheirus hippoglossi (Kroyer), ? • (p. 67.) 

8. Sternal fork. 

9. First maxilliped. 

10. Second maxilliped. 
Lepeophtheirus salmonis (Kroyer), ?• (p. 71.) 

11. Sternal fork. 

12. Foot of fourth pair. 
Lepeophtheirus pollachii Bassett-Smith. ? . (p. 73.) 

13. First maxilliped. 

14. Second maxilliped. 

15. Foot of fourth pair. 

16-19. Lepeophtheirus sturionis (Kroyer), ? . (p. 74.) 

16. Sternal fork. 

17. Second maxilliped. 

18. Foot of fourth pair. 

19. Furcal joints. 

(Figures much enlarged.) 



Figs. 

1-3. 


4,5. 


6,7 


8-10. 


11,12 


13-15. 



PLATE XVIII 




Plate 19 



Plate XIX. 

Figs. 

1-9. Lutkenia asterodermi Clans, $ . (p. 76.) 

1. Antennule. 

2. Antenna. 

3. First maxilliped. 

4. Second maxilliped. 

5. Foot of first pair. 

6. Foot of second pair. 

7. Foot of third pair. 

8. Foot of fourth pair. 

9. Abdomen and furcal joints. 

10. Elytrophora brachyptera Gerstaecker. (p. 83.) 

10. Foot of second pair, ? . 

11-18. Phyllothreus cornutus (M. Edwards), ?. (p. 92. 

11. Antennule. 

12. Antenna. 

13. First maxilliped. 

14. Second maxilliped. 

15. Foot of first pair. 

16. Foot of second pair. 

17. Foot of third pair. 

18. Foot of fourth pair. 

(Figures much enlarged.) 



PLATE XIX 



«=^S 




Plate 20 





Plate XX. 


Figs. 
1-8. 


Nogaus ambiguus T. Scott, <$ . (p. 78.) 




1. Dorsal view, x 13. 




2. Antennule. 




3. First maxilliped. 




4. Second maxilliped. 




5. Foot of first pair. 




6. Foot of second pair. 




7. Foot of third pair. 




8. Foot of fourth pair. 


9. 


Chondr acanthus annulatus Olsson. (p. 169.) 




9. Lateral view, $ , x 50. 


10. 


Chondracanthus merluccii (Holten). (p. 180.) 




10. Lateral view, $ , x 115. 



(Figures 2-8 much enlarged.) 



PLATE XX 




Plate 21 



Plate XXI. 

Figs. 

1. Lepeophtheirus sturionis (Kroyer). (p. 74.) 

1. Dorsal view, ?, x 6*6. 

2. Pandarus bicolor Leach, (p. 95.) 

2. Dorsal view, <$ (juv.) =Nogagus latus T. Scott, x 15. 
3, 4. Cecrops latreillii Leach, (p. 98.) 

3. Dorsal view, ? , x 2. 

4. Dorsal view, $ , x 2. 

5. Orthagoriscicola muricata (Kroyer). (p. 100.) 

5. Dorsal view, ? , x 2*5. 



PLATE XXI 







Plate 22 






Plate XXII. 

Figs. 

1, 2. Trebius caudaius Kroyer. (p. 81.) 

1. Dorsal view, ?, x &6. 

2. Dorsal view, <$ , x 15. 

3. Dinemoura producta (0. F. Miiller). (p. 86.) 

3. Dorsal view, ? , x 3'3. 

4. Echihrogaleus coleoptratus (Guerin). (p. 89.) 

4. Dorsal view, ? , x 4. 

5, 6. Pandarus bicolor Leach, (p. 95.) 

5. Dorsal view, ? , x 5. 

6. Dorsal view, $ , x 10. 



PLATE XXII 






Plate 23 



Plate XXIII. 

Figs. 

1, 2. Elytrophora brachyptera Gerstaecker. (p. 83.) 

1. Dorsal view, ? , x 8. 

2. Dorsal view, $ , x 8. 

3. Phyllothreus eornutus (M. Edwards), (p. 92.) 

3. Dorsal view, ? , x 4*5. 

4. Liitkenia asterodermi Claus. (p. 76.) 

4. Dorsal view, ? (enlarged). 

5,6. Anthosoma crassum (Abildgaard) . (p. 108.) 

5. Dorsal view, ? , x 3. 

6. Ventral view, ? , x 3. 



Plate 24 






Plate XXIV. 

Figs. 

1, 2. Caligus curtus 0. F. Miiller. (p. 45.) 

1. Dorsal view, ? , x 8. 

2. Dorsal view, <$ , x 6 - 5. 

3,4. Philorthr ag oris cus s err atus (Kroyer). (p. 104.) 

3. Dorsal view, ?, x 12-5. 

4. Dorsal view, $ , x 20. 



PLATE XXIV 




Plate 25 



Plate XXV. 

Figs. 

1-6. Thersitina gasterostei (Pagenstecher), ? . (p. 42. 

1. Antennule. 

2. Antenna. 

3. Second maxilliped. 

4. Foot of first pair. 

5. Foot of fourth pair. 

6. Abdomen and furcal joints. 

7-9. Galigus curtus 0. F. Miiller, $ . (p. 45.) 

7. Sternal fork. 

8. Second maxilliped. 

9. Foot of fourth pair. 

10. Lepeophtheirus thompsoni JBaird. (p. 69.) 

10. Sternal fork, ? . 

11-16. Caligus minimus Otto, ? & $ (p. 46.) 

11. Antennule, $ . 

12. Sternal fork, $ . 

13. Sternal fork, <$ . 

14. Second maxilliped, ? . 

15. Foot of fourth pair, ?. 

16. Second maxilliped, $ . 

(Figures much enlarged.) 



PLATE XXV 




Plate 26 



Plate XXVI. 

Figs. 
1-3. Dinemoura producta (0. F. Miiller), $ . (p. 86.) 

1. Foot of second pair. 

2. Foot of fourth pair. 

3. Fifth foot. 

4-19. Pandarus hicolor Leach, $ & <$ . (p. 95.) 

4. $ Antermule. 

5. Antenna. 

6. Maxilla. 

7. Fii'st maxilliped. 

8. Second maxilliped. 

9. Foot of first pair. 

10. Foot of second pair. 

11. Foot of third pair. 

12. Foot of fourth pair. 

13. $ Antennule. 

14. Antenna. 

15. Maxilla. 

16. First maxilliped. 

17. Second maxilliped. 

18. Foot of first pair. 

19. Foot of second pair. 

(Figures much enlarged.) 



Plate 27 



Plate XXVII. 

(p. 86. 



Figs. 






1-8. Dinemoura producta (0. F. 


Miiller), ? 


1. 


Antemiule. 




2. 


Antenna. 


, 


3. 


Mandible. 




4. 


Maxilla. 




5. 


First maxilliped. 




6. 


Second maxilliped. 




7. 


Foot of first pair. 




8. 


Foot of third pair. 




9, 10. Cecrops latreillii Leach, $ 


(p. 98.) 


9. 


Antenna. 




10. 


First maxilliped. 




1-24. Philorthragoriscus serratus 


(Kroyer), ? 


11. 


$ Antemiule. 




12. 


Antenna. 




13. 


Mandible. 




14. 


Maxilla, 




15. 


First maxilliped. 




16. 


Second maxilliped. 




17. 


Foot of first pair. 




18. 


Foot of third pair. 




19. 


Foot of fourth pair. 




20. 


Abdomen and f urea 


joints. 


21. 


cf Antenna. 




22. 


Maxilla. 




23. 


Second maxilliped. 




24. 


Foot of second pair. 





& <? . (p. 104.) 



(Figures much enlarged.) 



PLATE XXVII 




Plate 28 



Plate XXVIII. 



1-7. Cecrops latreillii Leach, ? . 


(p. 98.) 


1. 


Antemiule. 




2. 


Second maxilliped. 




3. 


Foot of first pair. 




4. 


Foot of second pair. 




5. 


Foot of third pair. 




6. 


Foot of fourth pair. 




7. 


Fifth foot. 




-18. Or thug or is cola muricata (K 


•oyer) , ? . 


8. 


Antemiule. 




9. 


Antenna. 




10. 


Mandible. 




11. 


Maxilla. 




12. 


First maxilliped. 




13. 


Second maxilliped. 




14. 


Foot of first pair. 




15. 


Foot of second pair. 




16. 


Foot of third pair. 




17. 


Foot of fourth pair. 




18. 


Fifth foot. 






( Figures much 


enlarged.) 



(p. 100.) 



PLATE XXVIII 




Plate 29 



Plate XXIX. 

Figs. 

1. Echthrogaleus lutkeni (Norman), (p. 90.) 

1. Dorsal view, $ (enlarged). 

2-5. Lemanthro'pus hroyeri P. J. van Beneden. (p. 110.) 

2. Dorsal view, ? , x 13*4. 

3. Abdomen and f ureal joints, ? (much enlarged). 

4. Dorsal view, S , x 13'4. 

5. Abdomen and f ureal joints, <$ (much enlarged). 



PLATE XXIX 






Plate 30 



Plate XXX. 

Pigs. 
1-8. Echthrogaleus liltheni (Norman), £. (p. 90.) 

1. Antennule. 

2. Antenna. 

3. First maxilliped. 

4. Second maxilliped. 

5. Foot of first pair. 

6. Foot of second pair. 

7. Foot of third pair. 

8. Foot of fourth pair. 

9-17. Lernanthropus kroyeri P. J. van Beneden, $. (p. 110.) 

9. Antennule with secondary process. 
' 10. Antenna. 

11. Mandible. 

12. Maxilla. 

^ 13. First maxilliped. 

14. Second maxilliped. 
• 15. Foot of first pair. 

16. Foot of second pair. 

17. Outer ramus of second foot, <$ . 

(Figures much enlarged.) 






PLATE XXX 




Plate - 31 



Plate XXXI. 

Figs. 
1-6. Elytrophora brachyptera Gerstaecker,, 9 . (p. 83.) 

1. Antenna. 

2. First maxilliped. 

3. Second maxilliped. 

4. Foot of first pair. 

5. Foot of fourth pair. 

6. Antenna, <$ . 
7-18. Dichelestium oblong um (Abildgaard), <j> & £ . (p. 106.) 



7. 


$ Antennule. 


8. 


Antenna. 


9. 


Mandible. 


10. 


Maxilla. 


11. 


First maxilliped. 


12. 


Second maxilliped. 


1 3. 


Foot of first pair. 


14. 


Foot of second, pair. 


15. 


Foot of fourth pair. 


K'». 


<$ Antenna. 


17. 


Foot of second pair. 


18. 


Foot of fourth pair. 



(Figures much enlarged.) 



PLATE XXXI 




Plate 32 






Plate XXXII. 

Figs. 

1—11. Hatschekia mulli (P. J. van Beneden). ? . (p. 114.) 

1. Adult female, dorsal view, x 24*5. 

2. Lateral view of head and thorax, adult x 36. 

3. Dorsal view, juv., x 36. 

4. Antennule. 

5. Antenna. 

6. Spiniform process at base of antenna. 

7. Mandible. 

8. Maxilla. 

9. Maxilliped. 

10. Foot of first pair. 

11. Foot of second pair. 

(Figures 4-11 much enlarged.) 



Plate 33 



Plate XXXIII. 

Tigs. 

1. Hatschehia cluthse (T. Scott), (p. 117.) 

1. Dorsal view, ? , x 58. 

2. Hatschehia labracis (P. J. van Beneden). (p. 115.) 

2. Dorsal view, ? , x 28. 

3,4. Hatschehia hippoglossi (Kroyer). (p. 112.) 

3. Dorsal view, ? , x 7. 

4. Dorsal view, 3 , x 34. 

5. Thysanote impmUca (Nordmann) . (p. 187.) 

5. Dorsal view, ? , x 10. 

6. ? Lernseopoda lampri sp. nov. (p. 202.) 

6. Lateral view, <$ , x 14. 



PLATE XXXII 






Plate 34 



Plate XXXIY. 

Figs. 
1-5. Hatschekia cluthse (T. Scott), ?. (p. 117.) 

1. Antennule. 

2. Antenna. 

3. Maxilla. 

4. Second maxilliped. 

5. Foot of first pair. 

6, 7. Hatschekia labracis (P. J. van Beneden), ? . (p. 115.) 

6. Antennule. 

7. Antenna. 

8-11. Hatschekia hippoglossi (Kroyer), $. (p. 112.) 

8. Antennule. 

9. Mandible. 

10. Second maxilliped. 

1 1 . Foot of first pair. 

(Figures much enlarged.) 



Plate 35 



Plate XXXV. 

Figs. 

1,2. HatscheMa comigera T. Scott, ?. (p. 118.) 

1. Dorsal view, x 40. 

2. Lateral view of head and thorax, x 80. 
3-7. HatscheMa pygmseaT. Scott, ?. (p. 119.) 

3. Dorsal view, x 45. 

4. Maxilliped. 

5. Foot of first pair. 

6. Foot of second pair. 

7. Abdomen and furcal joints. 

( Figures 4-7 much enlarged.) 



PLATE XXXV 




- 



Plate 36 



Plate XXXVI. 

Figs. 

1-5. Ratschehia comigera T. Scott, ? . (p. 118.) 

1. Antennule. 

2. Antenna. 

3. Maxilliped. 

4. Foot of first pair. 

5. Foot of second pair. 

6-9. Hatschehia pygmsea T. Scott, ? . (p. 119.) 

6. Antennule. 

7. Antenna. 

8. Mandible. 

9. Maxilla. 

(Figures much enlarged.) 



PLATE XXXVI 




Plate 37 



Plate XXXVII. 

Figs. 

1. Eudactylina acuta P. J. van Beneden. (p. 126. 

1. Dorsal view, ?, x 41. 

2, 3. Eudactylina acauthii A. Scott, (p. 128.) 

2. Dorsal view, $ , x 41. 

3. Lateral view, ? , x 41. 

4, 5. Eudactylina similis T. Scott, (p. 130.) 

4. Lateral view, ? , x 34. 

5. Lateral view, S , x 34. 

6, 7. Eudactylina minuta T. Scott, (p. 133.) 

6. Dorsal view, ? , x 40. 

7. Lateral view, ? , x 40. 



PLATE XXXVII 




Plate 38 



Plath: XXXVIII. 

Figs. 
1-5. Eadactylina acuta P. J. van Beneden, ? . (p. 126.) 

1. Antennule. 

2. Foot of first pair. 

3. Foot of second pair. 

4. Foot of fifth pair. 

5. Part of abdomen, and furcal joints. 
6-12. Eudactylina acanthii A. Scott, ? . (p. 128.) 

6. Antennule. 

7. Antenna. 

8. Foot of first pair. 

9. Foot of second pair. 

10. Foot of fourth pair. 

11. Foot of fifth pair. 

12. Part of abdomen, and furcal joints. 

(Figures much enlarged.) 



PLATE XXXVIII 




Plate 39 



Plate XXXIX. 



Figs. 

1-17. Eudactylina similis T . Scott, ? & <$. (p. 130.) 

1. ? Antennule. 

2. Antenna. 



3. Mandible. 

4. Maxilla. 

5. First 



illiped. 



maxn 

6. Second maxilliped. 

7. Foot of first pair. 

8. Foot of second pair. 

9. Foot of fourth pair. 

10. Foot of fifth pair. 

11. Part of abdomen, and f ureal joints. 

12. c? Antennule. 

13. Second maxilliped. 

14. Foot of first pair. 

15. Foot of second pair. 

16. Foot of fourth pair. 

17. Part of abdomen, and furcal joints. 

(Figures much enlarged.) 



PLATE XXXIX 




Plate 40 



Plate XL. 

Figs. 

1-9. Eudactylina minuta T. Scott, $ . (p. 133.) 

1. Antennule. 

2. Antenna. 

3. First maxilliped. 

4. Second maxilliped. 

5. Foot of first pair. 

6. Foot of second pair. 

7. Foot of fourth pair. 

8. Foot of fifth pair. 

9. Part of abdomen, and furcal joints. 

(Figures much enlarged.) 



PLATE XL 




Hate 41 



Plate XLI. 

Figs. 

1. Congericola pallida P. J. van Beneden, ? dorsal view, 
x 17. (p. 124.) 
2-4. Chondracanthus depressus T. Scott, (p. 172.) 

2. ? Dorsal view, x 12. 

3. Posterior end of body in dorsal view, x 12. 

4. Var. oblongus, $ dorsal view, x 12. (p. 173.) 

5. Chondracanthus zei De la Roche, ? dorsal view, x 5. 
( P . 177.) 
~f 6. Chondracanthus omatus T. Scott, ? dorsal view, x 10. 
(p. 182.) 



PLATE XLI 




Plate 42 









Plate XLII. 

Figs. 

1—8. Lemsea branchialis Linn. (p. 142.) 

1. Mature female, side view, x 4. 

2. Newly hatched nauplius x 51. (p. 21.) 

3. Very young female, unfertilized, dorsal view, x 51|| 

(p. 21.) 

4. Fertilized female, after leaving the gills of a flounder, 

dorsal view x 27^. (p. 21.) 

5. Mature male, dorsal view, x 28£. (p. 21.) 

6. Fertilized female, ' Pennella stage/ just after attach- 

ment to the gills of a whiting, dorsal view, x 15 i. 
(p. 23.) 
6a. A later stage than fig. 6; the folding has just been 
completed ; side view, natural size. (p. 23.) 

7. Apex of the gill-ray of a flounder, normal, x 18. 

(p. 22.) 

8. Apex of the gill-ray of a flounder, shewing mal- 

formation caused by the young Lernxa, x 18. 
(p. 22.) 



PLATE XLII 




Plate 43 



Plate XLIII. 

Figs. 

1-7. Lemsea branchialis Linn. (p. 142.) 






Fertilized female, ventral view, shewing the appen- 
dages, the reproductive organs, and the nervous 
system, x 47 4. (p. 22.) 

Mature female, seen from the right side, shewing 
the maxilliped and four pairs of feet, the alimen- 
tary canal, and the reproductive organs; from a 
specimen cleared in xylol, x 4. (p. 19.) 

Transverse section through the middle of the swollen 



the oviducts, cement 

(p. 21.) 
the abdomen, x 20. 



region, shewing the ovary, 

glands, and intestine, x 9. 
Transverse section through 

(p. 22.) 
Portion of the cement-gland, x 20. (p. 21.) 
Transverse section through the region of the eyes 

of a young fertilized female, x 80. (p. 22.) 
Front view of the anchor processes of an adult 

female, x 4. (p. 22.) 



PLATE XLIII 




Plate 44 



Plate XLIV. 

Figs. 

1. Lernsea hisci Bassett-Smith, ? side view, x 6. (p. 144.) 

2. Another specimen ( $ ) in situ on gill-arch of fish, x 

about 2. 

3. Lemma minuta, T. Scott, ? side view, x about 5. 

(p. 145.) 

4. Lernsea Iwmpi, T. Scott, ? side view, x about 2. (p. 146.) 
5-7. Htemobaphes cyclopterina (Fabr.). (p. 147). 

5. Side view (head wanting), x 9. 

6. The head, after Steenstrup & Liitken, enlarged. 

7. The same, seen from another position, enlarged. 

8. Hsemobaphoides awibiginis T. Scott, ? side view, x 7. 
(p. 148.) 



PLATE XL1V 




Plate 45 



Plate XLV. 



Figs 
1. 



2,3 



4,5 



? dorsal view, enlarged. 



Bebelula edwardsi (Kolliker), 

(p. 162.) 
PMlichthys xiypkise Steenstrup, $ . (p. 139.) 

2. A young specimen, dorsal view, enlarged. 

3. An older specimen, dorsal view, enlarged. 
Dichelestium oblongum (Abildgaard). (p. 106.) 

4. Dorsal view, 9, x about 4. 

5. Dorsal view, $ , x about 4. 

6. Tripaphylus musteli P. J. van Beneden, 

enlarged, (p. 160.) 

7. Ghondr acanthus oruatus T. Scott, S side 

enlarged, (p. 182.) 

8. Brachiella rosirata Kroyei 

(p. 205.) 



$ side view, 

view, greatly 

$ side view, x about 25. 



PLATE XLV 







Plate 46 



9) 



Plate XLV1. 

Figs. 

1-5. Lernseenicus sprattse (Sowerby). (p. 156.) 

1. Female in situ in eye of sprat, natural size. 

2. Female removed from fish, x about 2£. 

3. Head and neck of female, more enlarged. 

4. Antennule, greatly enlarged. 

5. Antenna, greatly enlarged. 

6—9. Lern&enicus encra\jsicola (Turton). (p. 15$.) 

6. Female in situ in back of sprat, natural size. 

7. Shows head of female penetrating into the abdominal 

cavity of the sprat, enlarged. 

8. Head of female, ventral view, enlarged. 

9. Head, side view, enlarged. 



PLATE XLVI 




Plate 47 






Plate XLVII. 

Figs. 

1. Chondr acanthus cornutus (0. F. Miiller), ?, x about 6. 

(p. 168.) 

2. Chondracanthus cornutus, var. ? , x 6. (p. 169.) 

3. Chondracanthus annulatus Olsson, ¥ , x 4. (p. 169.) 

4. Chondr acanthus solese Kroyer, ¥, x 7. (p. 170.) 

5. Chondracanthus jiuree, Kroyer, ?, x 6. (p. 171.) 

6. Chondracanthus limandx Kroyer, ¥, x 13. (p. 174.) 

7. Chondracanthus clavatus Bassett- Smith, ¥, x 8. (p. 175.) 

8. Chondracanthus merluccii (Holten), ¥ , x 8. (p. 180.) 



PLATE XLVII 




Plate 48 



m 



Plate XLVIII. 



Figs. 
1-3. Lepeophtheirus thompsoni Baird, ?. (p. 69.) 

1. Sternal fork. 

2. Sternal fork, another form. 

3. Foot of fourth pair. 

4, 5. Lepeophtheirus pollachii Bassett-Smith, ? . (p. 73.) 

4. Sternal fork. 

5. First maxilliped. 

6. Galigus hrevicandatus A. Scott, ¥ . Sternal fork. 

(p. 56.) 
i . Caligus diaphanus Nordmann, ? . Sternal fork, 
(p. 60.) 
8-12. Lemeeopoda sahnonea (Linn.), $ . (p. 199.) 

8. Antennule. 

9. Anteuna. 

10. Mandible. 

11. Maxilla. 

12. First maxilliped. 

13-16. Ghondracanthus nodosus (0. F. Miiller), ?. (p. 176.) 

13. Antennule. 

14. Mandible and maxilla. 

15. Foot of first pair. 

16. Foot of second pair. 

17. Ergasilus nanus P. J. van Beneden, ?. Antenna. 

18. Brachiella insidiosa Heller, adult male, side view, 

x 18. (p. 206.) 






(Figs. 1-17 much enlarged.) 









PLATE XLVI1I 




Plate 49 



Plate XLIX. 

Figs. 
1-7. Tripaphylus musteli (P. J. van Beneden), S • (p. 160.) 

1. Antennule. 

2. Antenna. 

3. Mandible. 

4. Maxilla. 

5. First maxilliped. 

6. Second maxilliped. 

7. Abdomen. 

8-11. Thysanote impudica (Nordmann), 9. (p. 187.) 

8. Antennule. 

9. Mandible. 

10. Maxilla. 

11. First maxilliped. 
12-16. (?) Lern&opoda lampri sp. n., $ . (p. 202.) 

12. Antenna. 

13. Mandible. 

14. Maxilla. 

15. First maxilliped. 

16. Second maxilliped. 

(Figures much enlarged,) 



PLATE XLIX 




Plate 50 



Plate L. 

Figs. 

1-5. Lemeocera cyprinacea (Linn.), ?. (p. 154.) 

1. A specimen seen from the side, x 9. 

2. The head, front view. 

3. The head, seen from another position, more enlarged 

than fig. 2. 

4. A specimen of L. cyprinacea, x 5. (After Selago.) 

5. Another specimen, x about 3. (After Baird.) 
6-8. Achtheres percarum Nordmann. (p. 193.) 

6. A female, dorsal view, x 18. 

7. Distal extremity of second maxillipeds, enlarged. 

8. A male, dorsal view, x 85. 

9. Brachiella bispinosa Nordmann, ? dorsal view, x 7. 
(p. 211.) 

( Figs. 1-3 and 6-9 after Nordmann.) 



PL ATM L 




Plate 51 



Plate LI. 






Figs. 

1. Tripaphylus mvsteli (P. J. van Beneden), ?, x 2| (Lead 

wanting), (p. 160.) 

2. Pennella orfhagorisci E. P. Wright, ?, about natural size 

(head wanting), (p. 150.) (Thomas Edward's specimen.) 

3. Sphyrion lumpi (Kroyer), ?, x about 2. (p. 164.) 

4. A smaller specimen, rather imperfect, x about 4. 

5. Eebehtla edicardsi (Kolliker), ?, x about 2 (Lead 

wanting), (p. 162.) 

6. Thersitina gasterostei (Pagenstecher), ?, x 27. (p. 42.) 

7. Clavella lophii (M. Edwards), ¥, x 2. (p. 226.) 



(All the figures shew dorsal view.) 






PLATE LI 




Plate 52 



Plate LII. 

Figs. 

1-3. Chondracanthus nodosus (0. F. Miiller). (p. 176.) 

1. Adult female, dorsal view, x &\. 

2. A young specimen, dorsal view, x about 9. 

3. An adult male, side view, x 80. 

4. Chondracanthus lophii Johnston, ?, x above 5. (p. 179.) 

5. Chondracanthus cornutus (0. F. Miiller), <$ , side view, 

x about 100. (p. 168.) 

6. Medesicaste asellinum (Linn.), ? dorsal view, x 7|. 

(p. 184.) 



PLATE LI I 




Plate 53 



Plate LIII. 

Figs. 

1-4. Chondr acanthus comutus (0. F. Mtiller), ? & J. 
(p. 168.) 

1. ? Antennule. 

2. Mandible. 

3. J 1 Foot of first pair. 

4. Foot of second pair. 

5-9. Chondr acanthus comutus, var., ? & (J. (p. 169.) 

5. ? Antennule. 

6. Mandible. 

7. J Antennule. 

8. Foot of first pair. 

9. Foot of second pair. 

10,11. Chondr acanthus flurse Kroyer, ?. (p. 171.) 

10. Antennule. 

11. Mandible. 

12-15. Cliondracanthus solese Kroyer, ? & J. (p. 170. 

12. ? Antennule. 

13. Mandible. 

14. S Antennule. 

15. Foot of second pair. 

16-19. Chondr acanthus merluccii (Holten), ? & <$ . (p. 180.) 

16. ? Antennule. 

17. Mandible. 

18. S Foot of first pair. 

19. Foot of second pair. 

(Figures much enlarged.) 



PLATE LIII 




Plate 54 



Plate LIV. 

Figs. 

1-11. Trebius caudatus Kroyer, ?. (p. 81.) 

1. Antennule. 

2. Antenna. 

3. Mandible. 

4. Maxilla. 

5. Sternal fork. 

6. First maxilliped. 

7. Second maxilliped. 

8. Foot of first pair. 

9. Foot of second pair. 

10. Foot of fourth pair. 

11. Fifth foot. 

12-17. Gharopinus dalmanni (Retzius), V & <$ . (p. 189.) 

12. ? Antennule. 

13. Antenna. 

14. Mandible. 

15. Maxilla. 

16. First maxilliped. 

17. S Second maxilliped. 

18-22. Gharopinus ramosus Kroyer, $. (p. 191.) 

18. Antennule. 

19. Antenna. 

20. Mandible. 

21. Maxilla. 

22. First maxilliped. 

(Figures much enlarged.) 



PLATE LIV 




Plate 55 



Plate LV. 



Figs. 
1-4. 



6,7. 



Charopinus dalmanni (Retzius). (p. 189.) 

1. Female, dorsal view, x 2. 

2. Female, side view, x 2. 

3. Ends of the second maxillipeds, slightly enlarged. 

4. Male, side view, x 36. 

Charopinus dubius T. Scott, 2, dorsal view, x 3^. 

(p. 190.) 
Charopinus ramosus Kroyer, ?. (p. 191.) 

6. Dorsal view, x 4. 

7. Side view, x 4. 



PLATE LV 




Plate 56 



Plate LVI. 

Figs. 

1-4. Chondr acanthus depressus T. Scott, V . (p. 172.) 

1. Antennule. 

2. Mandible. 

3. Foot of first pair. 

4. Foot of second pair. 

5-7. Chondr -acanthus depressus, var. oblong us, ?. (p. 173.) 

5. Antennule. 

6. Foot of first pair. 

7. Foot of second pair. 

8-10. Chondracanthus annulatus Olsson, ? & S ■ (p. 169.) 

8. 2 Antennule. 

9. Mandible. 

10. £ Antennule. 

11,12. Chondr acanthus limandee l\.r oyer, $. (p. 174.) 

11. Antennule. 

12. Mandible. 

13. Chondr acanthus zei De la Roche, ?. Antennule. 
(p. 177.) 
14,15. Chondracanthus clavatus Bassett-Smith, ?. (p. 175.) 

14. Antennule. 

15. Mandible. 

16-18. Chondracanthus lophii Johnston, ?. (p. 179.) 

16. Antennule. 

17. Mandible. 

18. Maxilla. 

( Figures much enlarged.) 






PLATE LVT 




' ^rmn^'tvmwn^ 



Plate 57 



Plate LVII. 

Figs. 
1-7. Lemseopoda cluthae T. Scott, ? & <$. (p. 198.) 

1. ¥ Antenuule. 

2. Antenna. 

3. Mandible. 

4. Maxilla. 

5. First maxilliped. 

6. $ First maxilliped. 

7. Second maxilliped. 

8-12. Lemseopoda bidiscalis W. F. de Visme Kane, ? . 
(p. 200.) 

8. Antennule. 

9. Antenna. 

10. Mandible. 

11. Maxilla. 

12. First maxilliped. 

13-17. Lemseopoda elongata (Grant), ?. (p. 195.) 

13. Antennnle. 

14. Antenna. 

15. Mandible. 

16. Maxilla. 

17. First maxilliped. 

18,19. Medesieaste asellinum (Linn.), ?. (p. 184.) 

18. Antennule. 

19. Mandible. 

(Figures much enlarged.) 



PLATE LVII 




Plate 58 





Plate LVIII. 


Figs. 

1-8. 


Pandarus bicolor Leach, S (juv.), (= Nogagus 




T.Scott), (p. 95.) 




1. Antennule. 




2. Antenna. 




3. First maxilliped. 




4. Second maxilliped. 




5. Foot of first pair. 




6. Foot of second pair. 




7. Foot of third pair. 




8. Foot of fourth pair. 


)-15. 


Lemseopoda galei Kroyev, ? & J. (p. 197.) 




9. ? Antennule. 




10. Antenna. 




11. Mandible. 




12. Maxilla. 




13. ¥imt maxilliped. $- 




14. -Boooncl maxilliped. °^^ 




15. £ Second maxill^^).**- 6 - ' 


16. 


Lemseopoda cluthse T. Scott, <$. (p. 198.) 




16. Abdomen and caudal furca. 



I at i 



(Figures much enlarged.) 



PLATE LVIII 




Plate 59 



Plate LIX. 

Figs. 

1-6. Lemseopoda salmonea (Linn.), (p. 199.) 

1. Female, dorsal view, x 12. 

2. The same, side view, x 12. 

3. Another specimen, ? adult, dorsal view, x 8 (to 

shew variation). 

4. The same, seen from the side, x 8. 

5. A female, somewhat immature, dorsal view, en- 

larged . 

6. The same, seen from the side, enlarged. 
7, 8. Achtheres percarum Nordmann, ? . (p. 193.) 

7. Dorsal view, much enlarged. 

8. The same, seen from the side. 



PLATE LIX 




Plate 60 



Plate LX. 

Figs. 

1-3. Lernseopoda cluthse T. Scott, (p. 198.) 

1. Female, dorsal view, x 8. 

2. The same, seen from the side, x 8. 

3. Male, seen from the side, x about 50. 
4-6. Lerneeojpoda galei Kroyer. (p. 197.) 

4. Female dorsal view, x 4. 

5. The same, seen from the side, x 4. 

6. Male, seen from the side, x about 50. 

7. Brachiella ovalis (Kroyer), seen partly from the side, 
x about 12. (p. 210.) 



PLATE LX 




Plate 61 



Plate LXI. 

Figs. 

1, 2. Lemseopoda bidiscalis W. F. de Visme Kane. (p. 200.) 

1. Female, dorsal view, x about 6. 

2. The same, seen from the side, x about 6. 
3,4. Lemseopoda elongata (Grant), (p. 195.) 

3. Female, dorsal view, x 2*3. 

4. The same, seen from the side, x 2 - 3. 
5, 6. Lemseopoda similis sp. n. (p. 202.) 

5. Female, dorsal view, x 10A. 

6. The same, seen from the side, x 10|. 

Note.— Vol. I, p. 195, for Plate LXI, tigs. 5, 6 ■ read figs. 3, 
4; and page 202, for Plate LXI, figs. 3, 4; read figs. 5, 6. 






PLATE LXI 




3 : 




r # 



, 



[f^Jl /M 



■•'■ v 



)■: 



n 






i" 1 



Plate 62 



Plate LXII. 

Figs. 

1. Brachiella trigla Claus, ?, ventral aspect, x 20. 

(p. 209.) 

2. Brachiella insidiosa Heller, ? , side view, x 5. 

(p. 206.) 

3. Brachiella rostrata Kroyer, ? , side view, x 5. (p. 205.) 
4,5. Brachiella merluccii Bassett- Smith, 2, x 6. (p. 207.) 

4. Dorsal view. 
5." Side view. 



PLATE LXII 




Plate 63 






Plate LXIII. 

Figs. 

1. Lemaeopoda galei Kroyer, $ , abdomen and caudal 
fnrca, x 26. (p. 197.) 
2-8. Brachiella rostrata Kroyer, $ & J 1 , (p. 205.) 

2. 2 Antennule. 

3. Antenna. 

4. Mandible. 

5. Maxilla. 

6. First maxilliped. 

7. S First maxilliped. 

8. Second maxilliped. 

9-16. Brachiella insidiosa Heller, 2 & £ . (p. 206.) 

9. 2 Antennule. 

10. Antenna. 

11. Mandible. 

12. Maxilla. 

13. First maxilliped. 

14. S Antenna. 

15. First maxilliped. 

16. Second maxilliped. 

17-20. Brachiella merluccii Bassett-Smith, 2. (p. 207.) 

17. Antennule. 

18. Mandible. 

19. Maxilla. 

20. First maxilliped. 

21-25. Brachiella triglse Olaus, 2 . (p. 209.) 

21. Antennule. 

22. Antenna. 

23. Mandible. 

24. Maxilla. 

25. First maxilliped. 

26-30. Brachiella oralis (Kroyer), 2. (p. 210.) 

26. Antennule. 

27. Antenna. 

28. Mandible. 

29. Maxilla. 

30. First maxilliped. 

(Figures much enlarged.) 



PLATE LX1I1 




Plate 64 












Plate LXIV. 

Figs. 

1-3. Achtheres percarum Nordmann, ? . (p. 193.) 

1. Anterior end, ventral aspect, shewing mouth- 

appendages. 

2. First maxillipeds, side view. 

3. Second maxilliped, side view. 
4-6. Brachiella thynni Cuvier. (p. 204.) 

4. Male, seen from the side, x 30. 

5. Female, scarcely mature, head wanting, slightly 

enlarged. 

6. Female, adult, x about 3. 

7. Brachiella parheri G. M. Thomson, ?, x Sh. (p. 212.) 

8. Brachiella pastinacse P. J. van Beneden, ? . x 10. 

(p. 211.) 

9. Brachiella hispinosa Nordmann, 9, x 7, side view 

after Nordmann. (p. 211.) 

(Figs. 1-3 and 9 after Nordmann; 4-6 after Steenstrup 
& Liitken ; 7 and 8 after Miss Bainbridge.) 



PLATE LXIV 




Plate 65 



Plate LXV. 

Figs. 

1. Clavella brevicollis (M. Edwards), ? , side view, x about 
20. (p. 220.) 
2, 3. Clavella wicinata (0. F. Miiller). (p. 214.) 

2. ? , Side view, x about 7. 

3. c? , Side view, x about 45. 

4. Clavella rugosa (Kroyer), ? , side view, x 4^. (p. 216. 

A male is shewn attached to the cephalothorax. 

5. Clavella rugosa (Kroyer), <$ , side view, x about 40. 

6. Clavella (?) uncinata, ? (juv.), with two males attached 

to the abdomen, enlarged, (p. 214.) 

7. Clavella dubia, T. & A. Scott, ? , side view, x 

(p. 217.) 
8, 9. Clavella stellata (Kroyer), ? . (p. 220.) 

8. Side view, shewing a section of the scale of the 

fish to which the adhesive disk of the Clavella is 
attached, x 4^. 

9. Adhesive disk, enlarg-ed. 



PLATE LXV 




Plate 66 



Plate LXVI. 

Figs. 

1-7. Clavella rugosa (Kroyer), $ & <?. (p. 216.) 

1. ? Antennule. 

2. Antenna. 

3. Mandible. 

4. Maxilla. 

5. First maxilliped. 

6. <$ First maxilliped. 

7. Second maxilliped. 

8-11. Clavella dubia T. & A. Scott, ? . (p. 217.) 

8. Antennule. 

9. Mandible. 

10. Maxilla. 

11. First maxilliped. 

12-16. Clavella brevicollis (M. Edwards), ? . (p. 220.) 

12. Antennule. 

13. Antenna. 

14. Mandible. 

15. Maxilla. 

16. First maxilliped. 

17-20. Clavella emarginata (Kroyer), ? . (p. 218.) 

17. Antennule. 

18. Mandible. 

19. Maxilla. 

20. First maxilliped. 

21-23. Clavella uncinata (0. F. Muller), $ . (p. 214.) 

21. Antennule. 

22. Maxilla. 

23. First maxilliped. 

(Figures much enlarged.) 



PLATE LXV1 




Plate 67 



Plate LXVII. 

Figs. 

l-o. Clavella scombri (Kurz) . (p. 218.) 

1. Female, side view, x 12. A male is shewn 

attached to the cephalothorax. 

2. Female, in situ on gill-arch of fish, x about 4. 

3. Male, side view, x 56. 

4-6. Clavella paradoxa (P. J. van Beneden). (p. 222.) 

4. Female, dorsal view, x about 20. 

5. Female, in situ on gill-filament of fish, x 5. 

6. Male, side view, x 25. 



PLATE LXVI1 




Plate 68 



Plate LXVIII. 

Figs. 
1-7. Glavella scombri (Kurz) , ? & c?- (p. 218.) 

1. $ Antennule. 

2. Antenna. 

3. Mandible, apex shewing serrated edge. 

4. Maxilla. 

5. First maxilliped. 

6. (J First maxilliped. 

7. Second maxilliped. 

3-14. Clavella paradoxa (P. J. van Beneden), ? & c? . (p- 
222.) 

8. ? Antennule. 

9. Antenna. 

10. Mandible, apex shewing serrated edge. 

11. Maxilla. 

12. First maxilliped. 

13. £ First maxilliped. 

14. Second maxilliped. 

15. Clavella quadrata Bassett-Smith, ?, enlarged (after 
Bassett-Smith). (p. 223.) 

(Figures much enlarged.) 






PLATE LXVIII 




Plate 69 



Plate LXIX. 

Figs. 

1-3. Clavella canthari (Heller), (p. 224.) 

1. Female, dorsal view, x 9*3. 

2. The same, seen from the side, x 9'3. 

3. Male, seen from the side, x about 50. 
4-6. Clavella alata Brian, (p. 225.) 

4. Female, dorsal view, x 15. 

5. The same, seen from the side, x 15. 

6. Male, seen from the side, x about 50. 

7. Clavella emarginata (Kroyer) ? , side view, x about 
13. (p. 218.) 



PLATE LXIX 




Plate 70 



Plate LXX. 

Pigs. 
1-13. Krayeria lineata P. J. van Beneden. (p. 121.) 

1. Female, dorsal view, x about 24. 

2. Antennule. 

3. Antenna. 

4. Mandible. 

5. Maxilla. 

6. First maxilliped. 

7. Second maxilliped. 

8. Foot of first pair. 

9. Foot of second pair. 

10. Part of genital segment, and abdomen seen from 

the side. 

11. One of the cephalic spines. 

12. Male, dorsal view, x about 24. 

13. One of the cephalic spines. 

(Figures 2-11 and 13 greatly enlarged.) 



PLATE LXX 




Plate 71 



Plate LXXI. 



Figs. 

1-12. 



13. 



14. 



Euclactylina insolens sp. n., ? . (p. 135.) 



Dorsal view, 



x 50. 
50. 



Side view, 

Antennule. 

Antenna. 

Mandible. 

Maxilla. 

First maxilliped. 

8. Second maxilliped. 

9. Foot of first pair. 

10. Foot of second pair. 

11. Foot of third pair. 

12. Foot of fourth pair. 
Brachiella pastinaca P. J. 

x 10. (p. 211.) 
Caligus pelamydis Kroyer, 
58.) 



van Beneden, ? , side view, 
$ , dorsal view, x 24. (p. 



(Figures 3-12 greatly enlarged.) 

Note. — Fig. 13 is not referred to in the text, as the specimen 
was only recently obtained. 



Plate 72 



Plate LXXII. 
Figs. 
1-10. Argulus foliaceus (Linn.), ? . ( p . 227 ) 

2* Antenna d ° rSal ^^ enlar ^ ed about 6 ^ tim ^ 

3. Antennule. 

4. Mouth, side view. 

5. Siphon with retractile stylet. 

6. Second maxilliped. 

7. First swimming foot. 

8. Basiopodite of second foot. 

9. Basiopodite of third foot. 
10. Basiopodite of fourth foot. 

(Figures 2-10 much enlarged.) 



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