i8 The Pleistocene Deposits of Sankoty 



ASTYRIS LUNATA Say. (Verrill, 1875, p. 370). 

 The single specimen recorded by Verrill stands as the only 

 record for these deposits. It was from the lower shell bed. 



BUCCINUM UNDATUM Linn. (Desor and Cabot, 1849, p. 342). 

 This species is found in both beds 3 and 4. It is a fairly 

 common species in the former bed. 



*NASSA TRIVITTATA Say. (Desor and Cabot, 1849, p. 342). 

 Found in both the upper and lower shell beds, Nos. 1 and 3, 

 but much more commonly in the upper. 



*NASSA (ILYANASSA) OBSOLETA Say. (Desor and Cabot, 1849, 

 p. 342). Plate III figure 4. 



This species is found in all the four fossiliferous beds of the 

 deposit, but it is much more common in the lower shell bed than 

 in any of the others. 



*UROSALPINX CINEREA Say. (Verrill, 1875, p. 370). 

 Specimens of this species have been found in beds 1, 2 and 3, 

 but are much more common in the lowest bed than in the others. 



*EUPLEURA CAUDATA Say. Verrill, 1875, p. 370). 



Verrill records a single specimen of this species from the lower 

 shell bed. The collection from Nantucket, however, contains this 

 species. 



*SIPHO STIMPSONI Morch., var., BREVIS Verrill. (Neptunea 

 curta, Verrill, 1875, p. 373. Chrysodomus curta, Cushman, 1904, p. 

 171. Sipho stimpsoni, Cushman, 1905, p. 195). Plate III figure 5. 



This shell is the variety brevis of Verrill. He records it from 

 the upper shell bed. There is in the collection at Nantucket, a 

 very perfect specimen of this species with the protoconch excel- 

 lently preserved. 



*NEPTUNEA DECEMCOSTATUS Say. (Chrysodomus decemcostatus, 

 Cushman, 1905, p. 195). 



There is in the collection at Nantucket a fairly large specimen 

 of this species, but somewhat broken. 



TROPHON CLATHRATUS Linn. (Fusus scalariforinis, Merrill, 

 1896, p. 12. Trophon scalariforinis , Cushman, 1904, p. 171). 

 Merrill records this species from the Serpula bed, No. 2. 



