CHARACTERISTIC DEEP-SEA TYPES. RHIZOPODS. 165 



501, 501 ), with its smooth surface covered with fine pores. 



FIR. 501. Textularia trochiis. \. (Goes.) Fig. 501 a. 



Valmilina triangularis (Figs. 502, 502 a), a North Atlantic 



Fig. 502. Valvulina triangularis. |. (Goes.) Fig. 502 a. 



foraminifer, is also one of the typical West Indian rhizopods ; 

 it is characterized by its loosely constructed test. 



The Lagenidse are a most widely distributed type ; accord- 

 ^^^ ^^^^^^ _ ing to Brady, they are found in all 



seas, at all depths from the littoral 

 Fig. 503. Lagena distoma. region to 3.000 fathoms. One of the 



M. (Brady.) T J' * 



common species, Lagena distoma, is 

 here figured. (Fig. 503.) 



