60 



Genus. 

 Proto . . 



Caprella 



Cyamus 



REPORT — 1855. 



Group B. ABERRANTIA. 

 Family CaprellidsB. 

 Author. Species. Author. 



Leach pedata Leach. 



Goodsirii .... mihi. 



Kroyer longispina .... Kroyer. 



Lamarck .... linearis Latr. 



laevis* Goodsir. 



acanthifera. . . . Leach. 



acutifrons .... Desm. 



phasma Latr. 



tuberculata* . . Goodsir. 



lobata* Miiller. 



Pennantii .... Leach. 



Latr ceti* Linnaeus. 



ovalis* Rouss. 



gracilis * .... Rouss. 



gracilis * .... Gosse. 



Reference to Drawings. 



Fig. ]. 



Fig. 2. 

 Fig. 3. 

 Fig. 4. 



PLATE XII. 



Head of Talitrus locnsta, frontal 



aspect. 

 Head of ditto, lateral aspect. 

 Head of ditto, posterior. 

 Head of ditto, interior labial. 



A. Inferior antennal segment. 



B. Mandibular segment. 



C. Epistome or inferior portion 



ofB. 



D. Upper division of labium. 



E. Lower division of labium. 



F. Upper antenna. 



G. Lower antenna. 



H. First articulation of lower an- 

 tenna. 

 P. Second articulation of lower 

 antenna,represented by mem- 

 brane with calcareous margin. 

 I. Mandible. 



K. Inferior portion of the thin 

 posterior segment of the ce- 

 phalic region. 



Internal portion of the last 

 segment, (the homologue of 

 the dorsal part) : on this the 

 stomach rests. 

 First maxilla. 

 Second maxilla. 

 Maxilliped. 



O 



L. 



M. 

 N. 



Fig. 5. The part O seen from above. 



PLATE XIII. 

 Fig. 1. Superior antenna of Lysianassa. 

 a, b, c. Varieties of auditory 

 cilia. 



Fig. 2. Inferior antenna of Talitrus lo- 

 cusla. 



Fig. 3. Inferior antenna of Chelura te- 

 rebrans. 



Fig. 4. Inferior antenna of Sulcator are- 

 nariits. 



Fig. 5. Inferior antenna of Corophium 

 longicorne. 



Fig. 6. Inferior antenpa of Podocerus. 



Fig. Ga. Inferior antenna, the point of 

 Podocerus. 



Fig. 7. Inferior antenna of Hyperia 

 Galba. 



Fig. 8. Eyes of Tetromatus. 



PLATE XIV. 



Fig. 1. Olfactory organs or base of in- 

 ferior antenna in IseeaMontagui. 



Fig. 2. Olfactory organs of Gammurus 

 gracilis. 



Fig. 3. Olfactory organs of Gammarus 

 pulex. 



Fig. 4. Olfactory organs of ditto, enlarged. 



Fig. 5. Olfactory organs ? of Gammarus 

 elegans. 



Fig. 5a. Two of the segments enlarged. 



Fig. 6. Mandible of Talitrus locusta. 



Fig. 7. Mandible of ^non»/x. 



Fig. 8. Mandible of Gammaius gracilis. 



a. Molar tubercle. 



b. Incisive edge. 



c. Secondary edge with moveable 



joint. 



d. Hairs or ciliated spines. 



e. Muscles. 



Fig. 9. Dexamine spinosa. 



