70 ISKOOKLVN INSTITUTK ML'SKUM. SCIENCE BULLf;TlN 2. 4. 
Photinula expansa Sowerby. 
Miiri;,iiila rxpaiisa Sowerby, Conch. 111., Margarita, fig. 16 — 17, 1839. 
Margarita hillii Forbes, Proc. Zool. Soc. London, 1850, p. 272, pi. 11, fig. 10. 
PELECYl'ODA. 
Genus C^-.\MiL-M Philip])!. 
CvAMiTM MosTiiAi-iMi T'fetlcr. 
Cyamium mosthami Pfefifer, Jahrb. 1. c. p. 118, pi. i, fig. 4.J— />, 1S68. 
Shore drift at Prince Olafs Harbor. 
The hint^-e of tiiis sj^ecios does not ag'ree with that of the 
typical Cyaiiiiuiii atitarcticimi of I'hilip])i, as the teclh are more 
or less obsolete and not l)ifid; ihe ligament is strong-, not obso- 
lete; and the form Lcptonoid rather tlian Tellinoid. Still in 
the absence of more accurate information as to the variations 
in the s-enus it is iierha]>s best not to remo\e the present species 
from i'hilipi)i's n'enus. 
(icnus Moiiioi.AKc'A (u-ay. 
Ai()i)i<)i..\KCA sriiofAiiRATA Pfeffer. 
Moduilarca subquadrata Pfeffer, Jabrb, 1. c.. p. ui, pi. 4. S.i— ,-, g, 18S6. 
Modiohirca e.vilis von Martens, not A. Adams. 
Shore drift at Prince Olafs Harbor. 
MoDiOLARCA (KiDDivRiA ?) nicoi.oK vou [Marteus. 
Modkilarca bicolor von Marten>, J.ihrl.. 1. c, p. u;, pi. 4. «;.'■ ^2a-~d. 18S6. 
Shore drift at Prince Olafs Harbor. 
