72. 



THREE CRUISES OF THE "BLAKE/ 



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

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

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



Fig 1 . 299. Pecten phrygium 



Fig. 298. Pecten (Amusium) Dalli. 



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

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



Fig. 300. Fig. 301. 



Cetoconcha bulla. -|. 



Fig. 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. Nuculse are abun- 



Fig. 303. Tindaria cytherea. ^ . 



Fig. 304. Cardium peramahilis. 



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



