GASTEROPODA. 
PTEROPODA. 
HYALEADA. 
Hyauea Trispinosa, Lesueur. — Occasionally cast 
ashore at Nantucket. 
LIMACINADZ. 
Sprriatis Goutpu, St. Pl. I. Fig.4. Bost. Proce. iv. 8, 
1851. 'T. ovato-globosa, vitrea, pertenuis, pellucida, 
leevissima, arcté et profundé umbilicata ; spira conoi- 
dea; anf. 7, lineis minutis volventibus, impressis, re- 
motis insculpti; anf. ultimus magnus; apertura spi- 
ram sub-zquans, anticé obtusa. Long. .1; lat. .075. 
— Whole Coast. 
CLIONID. 
CLIoNE BoREALIS, Gray. Clione, Pallas. Clio borealis, 
Lin. Dekay. 
