[455] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 161 
Stomotoca apicata, meduse. 
Willia ornata, young meduse ; last of September. 
Dipurnea conica, meduse; July; evening. 
Gemmaria gemmosa, meduse; evening. 
Pennaria tiarella, medusze ; August, September. 
Ectopleura ochracea, meduse ; September. 
Nanomia cara, August, September; evening. 
Physalia Arethusa, July to September; day, (450.) 
Velella mutica, August; day. 
Polyps. 
Edwardsia, sp., larve 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 leviusculus, (439.) 
Pontogeneia inermis. 
Gammarus natator. 
Monoculodes, sp. 
Several species and genera of Copepods, very abundant. 
Larve of Balanus, December 21, January 7 and 8. 
Annelids, Ge. 
Nereis virens, adult males. 
Sagitta, sp., adult, abundant, (440.) 
Pontonéma 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, ETO. 
Large numbers of fishes were examined, both internally and externally, 
for parasites, and a large collection of such parasites was made. Thein- 
