THE MOUNT DESERT REGION 77 



Rotaliidae 

 DiscoRBis Lamarck 

 D. OBTUSA (d'Orbigny). (Fig. 28.) Our specimens agree 

 with Cushman's (1931, pi. 6, fig. 2) figures. The circular 

 apertural pores sho\^^l in our figure vary in size from 0.006 

 to 0.019 mm. In arenaceous mud, depth 45 feet, doubtful on 

 gravel and blue clay, depth 87 feet and 239 feet. 

 Stations : D 76 ; and with doubt D 19, 130. 



Fig. 28 Diseorbis obtusa, apertural region. 



Cassidulinidae 

 Cassidulina d'Orbigny 

 C. CRASSA d'Orbigny. On blue clay, depth 210 feet. 

 Station: D 150. 



Anomalinidae 

 CiBiciDES Denys de Mont fort 

 C. LOBATULUS (Walker and Jacob). Attached to all sorts of 

 objects, shore to 239 feet, very common. 

 Stations : S 48 ; D 19, 83, 130, 149, 150. 



