72 



THREE CRUISES OF THE "BLAKE.' 



Dalli (Fig. 298), of E. A. Smith, frequently dredged by the 

 :e Blake/' grows to a considerable size, but is as thin as mica 

 and nearly as transparent ; P. phrygmm Dall (Fig. 299) is re- 



Fig. 299. Pecten phrygium. \. 



Fig. 298. Pecten (Amusium) Dalli 



lated to miocene species, and has a very complicated sculpture. 

 Cetoconcha bulla (Figs. 300, 301) and C. elongata Dall (Fig. 



Fig. 300. Fig. 301. 



Cetoconcha bulla. . 



j. 302. Cetoconcha elon- 

 gata. 1. 



302), two species of a singular new genus, are almost as unsta- 

 ble in their framework as a drop of water. Nucula3 are abun- 



Fig. 303. Tindaria cytherea. lj&. 



Fig. 304. Cardium peramabilis 



dant. One of them, Tindaria cytherea (Fig. 303), the finest 



