•••8 PROCEEDINGS OF THE ACADEMY OF [Jan., 



SAXIOAVID^. 



Panopea decisa Conrad. 



Panopea decisa Conr., Jour. Acad. Nat. Sci., II, 2 ser., 275, pi. 24, f. 19, 

 1853. 



GASTROOH^NID^. 

 Gastrochaena americana Gabb, Jour. Acad. Nat. Sci., IV, 2 ser., 393, pi. C8, f. 20, 1S60. 



The specimen figured by Whitfield (pi. 25, f. 19). 



PHOLADID^. 



Pholas pectorosa Conrad, Jour. Acad. Nat. Sci., II, 2 ser., 299, pi. 27, f. 9. 

 Pholas cretacea Gabb, Jour. Acad. Nat. Sci., IV, 2 ser., 392, pi. 68, f. 18. 



Casts of the excavations replaced by pyrite, with no indications of 

 shell characters, so that it is doubtful whetner it is the same as the 

 following. 



Martesia cretacea Gabb, Proc. Acad. Nat. Sci., 1876, 304. 



TEREDINID^. 



Teredo tibialis Morton, Amer. Jour. Sci., XXIII, 292, Vol. XXIV, pi. 9, f. 2, 1S33. 

 Teredo irregularis Gabb, Jour. Acad. Nat. Sci., IV, 2 ser., 393, pi. 68, f. 19, 1860. 

 Teredo contorta Gabb, Proc. Acad. Nat. Sci., 1861, 323. 

 Bivonia cretacea Gabb, Proc. Acad. Nat. Sci., 1876, 802. 



SOAPHOPODA. 



Dentalium snbarcuatum Conrad, Jour. Acad. Nat. Sci., II, 2 ser., 276, pi. 24, f. 13, isfs. 



Also specimen figured by Whitfield (pi. XX, f. 19). 



Dentalium ripleyanum Gabb, Jour. Acad. Nat. Sci., IV, 2 ser., 393, pi. 69. f. 48, 1860. 



This name can only be applied to the smaller specimen; the other is 

 D. suharcuatum Conrad, 



Dentalium faloatum Conrad, Am. Jour. Conch., V, 44, pi. l, figs. 12-16, 1869. 



Internal casts of Hamulus (see under Serpulidce). 



Cadulus obrutus (Conrad). 



Gadus obrutus Conrad, Am. Jour. Conch., V, 101, pi. 9, f. 18, 1869. 



GASTEROPODA. 



Actseon cretacea Gabb, Proc. Acad. Nat. Sci., 1861, p. 318. 



In the drawer containing the "Gabb collection" above referred to, 

 I found the types of this species, which were not studied by Prof. Wliit- 

 field when writing his monograph. These show, as Gabb says, a resem- 

 blance to Tornatella bullata Morton, but is a smaller species, "the spire 

 higher," etc. The "two folds on the columella" are very distinct. 

 The specimen figured by Wliitfield (pi. XX, figs, o, 6) as the type of 

 "Cinulia cvoidea" Gabb, is a specimen of A. cntacea. Not having the 



