LCEMipoDA. CRUSTACEA. caprella. 335 



Genus HYP^RIA, Latr. 



H. Galea. Gammarus Galba, Montagu ; Lin. Trans., xi. pi. 2, f. 2. 

 The following are doubtless synonyms : 

 Oniscus medusarum, O. Fabr. ; Fauna Granl., 275. Hyperia Sueurii, Latr. 

 Hyperia Latreillii, Milne-Edw. ; ^nn. des Sc. J\fat., xx. 388, pi. 11, f. 1-7. 



This curious animal is found in the pouches of the Medusae or 

 Sun-fish as they are commonly called. Whether they make this 

 their home, or whether they become entrapped there or not, 

 it would be difficult to determine. They seem, however, to be 

 quite at their ease in this situation. 



Another animal with long, many-jointed antennae, was found in 

 company with the above, which belongs either to the same genus, 

 or to the genus Hieraco'nyx. 



LCEMIPODA. 



Genus CYAMUS, Latr. 



C. CETI, Latr.; Gen., i. GO. Desm. ; Consid., 280, pi. 46, f. 4. Ed- 

 wards ; Jnn. des Sc. JVat., 2d Series, iii. 328, pi. 04, f. 13, 14. Oniscus ceti, 

 Lin.; Mull. Larunda ceti. Leach. 



The whale-louse may be properly enumerated among our Crus- 

 tacea, as it is found on the whales which are occasionally caught 

 on our coast. It varies in form, according to its degree of de- 

 velopemeut. 



Genus CAPRELLA, Lam. 



I have observed two species of this curious genus, neither of 

 which can I refer to any described species. One of them is very 

 delicate, about half an inch long, with no spines upon any part, 

 that I can discover, and having its back thickly dotted with dark 

 green. 



The other is an inch in length, entirely crimson except its black 

 eyes. The head is blunt, the lower antennaj ciliated and extend- 

 ing to the second segment, and the upper ones to the third seg- 



