76 BIOLOGICAL SURVEY OF 



ratio decreases from 0.68 to 0.63 with increase in length of 

 the test. The present examples are somewhat broader than 

 is shown by the measurements of Cushman and Ozawa. One 

 of our specimens was kindly identified by Doctor Cushman. 

 In mud off Prettymarsh Harbor, depth 68 feet ; blue clay off 

 Ironbound Island, 239 feet. 

 Stations : D 112, 130. 



Nonionidae 

 NoNiON Denys de Montfort 

 N. LABRADORicuM (Dawsoii). On gravel and blue clay, depth 

 72 to 210 feet, common at D 115. 

 Stations : D 115, 150. 



Elphidium Denys de Montfort 



E. ARCTicuM (Parker and Jones). This species has the 

 sutures and umbilicus quite smoothly filled with cement. The 

 retral processes are numerous and close together, but appear 

 only on the periphery. In arenaceous mud and blue clay, 

 shore to 239 feet. 



Stations : S 21, 48 ; D 35, 76, 130, 150. 



E. iNCERTUM (Williamson). The retral processes are broad 

 and the interspaces are almost circular pits except at the base 

 of the last-formed chamber. The interspaces appear to be 

 gradually obliterated as the suture grows older. Most of 

 our material belongs to the typical variety, the variety da- 

 vatum Cushman having been taken at only two stations. On 

 arenaceous mud and blue clay, depth 30 to 239 feet. 



Stations : D 35, 76, 115, 130. 



E. I. VAR. CLAVATUM Cushmau. On same bottoms as the typi- 

 cal variety, depth 45 to 210 feet. 



Stations : D 76, 150. 



Buliminidae 

 BuLiMiNA d'Orbigny 

 An undetermined species of this genus was quite common 

 on blue clay, depth 210 feet. 

 Station: D 150. 



