io The Pleistocene Deposits of Sankoty 



BRYOZOA. 



*HIPPOTHOA VARIABILIS (Leidy). (Verrill, 1875, p. 372). 

 Found in beds 1 and 2 encrusting Hydroides tubes. 



*MEMBRANIPORA TENUIS Desor. (Verrill, 1875, p. 372). 

 Found on shells of the lower bed, No. 1. 



MEMBRANIPORA CATENULARIA Smitt. (Verrill, 1875, p. 372). 

 Found on shells of the lower bed, No. 1. 



ESCHARA VERRUCOSA Esper. (Verrill, 1875, p. 374). 

 On shells of Ceronia from bed No. 3. 



CELLEPORARIA INCRASSATA Smitt? (Verrill, 1875, p. 374). 

 Reported by Verrill from the upper bed, No. 3. 



MOLLUSC A PELECYPODA. 



*ARCA TRANSVERSA Say. (Desor and Cabot, 1849, p. 342). 

 This is one of the most abundant of the shells of the lower bed, 

 No. 1, but is also found sparingly in beds 2 and 3. 



*ARCA LIMULA Conrad. (Area ponderosa, Cushman, 1904, 

 pp. 170, 172, 1905, p. 195). 



This is not, as was first supposed, Area ponderosa Say, but is 

 Area limula Conrad, a southern fossil shell. The species is appar- 

 ently limited to the lower bed. During the summer a complete 

 specimen was found with both valves together and the shells up- 

 right in the position of life. 



ARCA PEXATA Say. (Merrill, 1896, p. 13). 



Reported from a layer between Nos. 2 and 3. No specimens 

 have been seen by the writer and the record is left upon Merrill's 

 authority. 



*OSTREA VIRGINICA Gmel. (Ostrea borealis, Desor and Cabot, 

 1849, p. 342). 



Apparently the most abundant shell of the lower bed. The two 

 valves are frequently found together, and show much variation. 

 It is frequently bored by Cliona sulphurea. This species occurs 

 with the preceding in the intermediate bed mentioned by Merrill, 

 and also occasionally in bed No. 3. 



ANOMIA ACULEATA Gmel. (Verrill, 1875, p. 374). 

 Found in the upper shell bed No. 3. 



