INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 455 



Stomotoca apicata, medusae. 

 Willia ornata, young- medusae ; last of September. 

 Dipurnea coniea, medusae ; July ; evening. 

 Gemuiaria gemmosa, medusae; evening. 

 Pennaria tiarella, medusae ; August, September. 

 Ectopleura ochracea, medusae ; September. 

 Nanoinia cara, August, September ; evening. 

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

 Yelella mutica, August ; day. 



Polyps. 



Edwardsia, sp., larvae in the " Arachnactis " stage ; September ; 

 evening, (451.) 



PROTOZOA. 



Numerous kinds of ciliated infusoria, (451.) 



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



Crustacea. 



Crangon vulgaris, young. 



Mysis Americana. 



Anonyx, (?,) sp. 



Calliopius laeviusculus, (439.) 



Pontogeneia inermis. 



Gammarus natator. 



Monoculodes, sp. 



Several species and genera of Copepods, very abundant. 



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



Annelids, &c. 



Nereis virens, adult males. 

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

 Pontonema marinum, adult. 

 Other Nematodes, 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- 



