SPIROTROPIS, BELA. 213 
. EXASPERATA, Dall. (1002 fms.) Off Cape S. Antonio, Cuba. 
. ? LEUCOMATA, Dall. Caribbean Sea. 
. GRATULA, Dall. Caribbxan Sea. 
. DETECTA, Dall. Caribbean Sea. 
SERGA, Dall. Caribbxan Sea. 
SMIRNA, Dall. Off Cape S. Antonio, Cuba. 
OLEACINA, Dall. Caribbxan Sea. 
HaAvVANEnsts, Dall. Off Havana ; Yucatan Strait. 
VERRILLIT, Dall. Caribbean Sea. 
PERIPLA, Dall. Yucatan Strait. 
ELUsIVA, Dall. Yucatan Strait. 
MoRRA, Dall. Off Havana. 
PUNCTATOSTRIATA, Carpenter. Bay of Panama. 
. APPRESSA, Carpenter. Cape St. Lucas, L. California. 
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Genus SPIROTROPIS Sars., 1878. 
S. cARINATA, Philippi. PI. 7, figs. 94, 93. 
Shell white, whorls slightly excavated above, angulated and 
carinated on the periphery ; sinus broad, deep and remarkably 
distinct, with the upper edge thickened. Length, 75 inch. 
Mediterranean Sea to Norway. 
Jeffreys thus describes the animal: Body cream-color ; pallial 
tube short ; tentacles cylindrical, short and slender; eyes black, 
‘small but very distinct, placed on the tops of stalks which are 
united to the tentacles and are one-half their length; foot pro- 
portionally large, almost equally broad throughout, squarish in 
front, and bluntly pointed behind. 
First described as a Sicilian tertiary fossil, and often known 
under the catalogue-name of P. modiolus, Jan. 
Genus BELA (Leach) Gray, 1847. 
Prof. Verrill has carefully reviewed the American species of 
Bela (Trans. Conn. Acad., v, 457-486), elucidating, as satisfac- 
torily as possible, the synonymy of this very variable group of 
Shells. His connection with the U. S. Fish Commission has 
given him opportunities for the study of their characters, such 
as have been enjoyed by no other naturalist. He says: “ Each 
