smith: on the genus astarte. 215 



1835. Astarte castanea? var. procera Totten. Amer. 



Jour. Sci. Arts, vol. xxviii., p. 348 — 9, f. za — 2/ 

 1841. A. castanea Gould. Invert. Mass., p. 76, f. 45. 

 1843. A. castanea De Kay. Zool. New York, part v., p. 220, 



pi. xxviii., f. 280. 

 1843. CrassinacastaneaHanley. Rec.Biv.,p. 88,pl. ix.,f. 27. 

 1845. Astarte castanea Philippi. Abbild., vol. ii., p. 57, 



pi. i., f. 2. 



1853. A. castanea Forbes & Hanley. Brit. Moll, vol. i., p. 470. 



1854. A. castanea Say. Sowerby, Thes. Con., vol. ii.,p. 782, 



pi. clxvii., f. 14 — 15. 

 1854. A. crassidens Sow., I.e., p. 782. 



1870. A. castanea Gould. Invert. Mass., ed. 2, p. 117,'. 431. 

 1872. A. castanea Tryon. Proc. Acad. Nat. Sci. Phil., p. 245. 

 1872. A. crassidens, id.. I.e., p. 245. 

 1874. A. castanea Sowerby. Con. Ic, vol. xix., f. \h. 



Habitat. — East coast of United States; Icy Cape (Belcher). 



The A. crassidens of Broderip and Sowerby, is remarkable 

 for its great size and the coarseness of the crenulation, having 

 "almost the appearance of low embrasures" (B. & S.) 



Dr. Jeffreys' observation in the Annals Mag. Nat. Hist., Oct,, 

 1872, p. 239, that this species is "perhaps a variety of ^. borealis 

 Chem.," is certainly erroneous, for there is no connection 

 between these two forms, one (castatiea) being a species with 

 crenulated, and the other with smooth margins to the valves. 



10.— ASTARTE QUADRANS Gould. 



1841. Astarte quadrans Gould. Invert. Mass., ed. i., p. 81, 



f. 48. 

 1843. A. portlandica Mighels. Proc. Bost. Soc. Nat. Hist., 



vol. i., p. 129. 



