[455] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 161 



Stomotoca apicata, medusae. 

 Willia oruata, young medusre ; last of September. 

 Dipurnea conica, medusa ; July ; evening. 

 Gemmaria gemmosa, medusas ; evening. 

 Pennaria tiarella, medusae ; August, September. 

 Ectopleura ochracea, medusa3 ; September. 

 Nanoinia cara, August, September; evening. 

 Physalia Arethusa, July to September; day, (450.) 

 Velella mutica. August ; day. 



Polyps. 



Edwardsia, sp., larvae in the &quot; Aracbuactis &quot; stage; September; 

 evening, (451.) 



PROTOZOA. 



Numerous kinds of ciliated infusoria, (451.) 

 List of species taken at the surface in winter, December to March. 



Crustacea. 



Craugou vulgaris, young. 



My sis Americana. 



Anonyx, (?,) sp. 



Calliopius laeviusculus, (439.) 



Pontogeneia iuerniis. 



Gammarus natator. 



Monoculodes, sp. 



Several species and genera of Oopepods, very abundant. 



Larvae of Balanus, December 21, January 7 and 8. 



Annelids, &c. 



Nereis virens, adult males. 

 Sagitta, sp., adult, abundant, (440.) 

 Pontonema marinurn, adult. 

 Other Neniatodes, undetermined. 



Acalephs. 



Pleurobrachia rhododactyla, young and adult, abundant, (450.) 

 Mnemiopsis Leidyi, adult, abundant, (450.) 

 Cyanea arctica, young ; March. 

 Tima formosa, adult, (449.) 



II. 10. ANIMALS PARASITIC ON FISHES, ETC. 



Large numbers of fishes were examined, both internally and externally, 

 for parasites, and a large collection of such parasites was made. The in- 



