

77X PROCEEDINGS OF THE NATIONAL MUSEUM. VOL.XX. 



Family SEMELID^E. 



ABRA LONGICALLIS (Scacchi), variety AMERICANA, new. 



(Plate LXXXIII, figs. 6, 7.) 

 Abra longicallis VERRILL, Trans. Conn. Acad., VI. pp. 224, 278, 1884. 



Our specimens differ from the European form described and figured 

 by G. O. Sars 1 in having the posterior lateral tooth less remote and the 

 cartilage-pit or chondrophore longer, the antero-dorsal margin more 

 convex, and the whole shell relatively broader. 



A very few specimens were obtained at six stations between 1ST. lat. 

 39 49', W. long. 68 28' 30", and N. lat. 30 16' 30", W. long. 68 21'. in 

 924 to 2,020 fathoms, 1883-18S6. 



Family TELLINIDJS. 



MACOMA INFLATA Dawson. 



(Plates LXXVII, fig. 1; LXXXVIII, fig. 6.) 



Macoma inflata (STIMPSON MSS ) DAWSON, Canadian Naturalist, VI, p. 377, 

 1872. VERRILL, Trans. Conn. Acad., V, p. 568, 1882. 



A number of live specimens and separate valves were obtained at 

 six stations between N. lat. 47 40', W. long. 47 35' 30". and X. lat. 40^ 

 3', W. long. 70 31', in 57 to 206 fathoms, 1877-1886. Murray Bay.- 

 Dawson. Gulf of St. Lawrence. Coll. Whiteaves. 



Family PETRICOLID.E. 



CHORISTODON ? CANCELLATUS Verrill. 



(Plate XCVI, figs. 2, 3.) 



Clioristodon '! rancellahis VKKRILL, Trans. Conn. Acad., VI, p. 435, 1885^ BALL, I 

 Bull. U. S. Nat. Mus., No. 37, p. 58, 1889. 



One valva, station 2265, off Chesapeake Bay, in 70 fathoms, 1884. 



Family KELLIELLID.E. 



KELLIELLA NITIDA Verrill. 



(Plates XCI, fig. 8; XCIII, fig. 10.) 



KeUicUa .tp. VKRRILL, Trans. Conn. Acad., VI. p. 279, 1884; Expl. Alba1r<<x, 



Report 1 T . S. Com. Fish and Fisheries 1'or 1883, p. 576, 1885. 

 KcUh-Ua -tiititla VEHRILL, Trans. Conn. Acad., VI, p. 438, 1885. 



Comparatively few specimens, at seven stations between N. lat. 39 

 5' 30", W. long. 700 44' 30^ an( j y. i a t. 38^ 20', W. long. 70 8' 30", in 

 1,525 to 2,033 fathoms, 1S83-1S86. 



Mollusca Reg. Arctic^ Norvegite, p. 74, pi. 6, figs. 3 a-c; pi. 20, fig. 4, 1878. 



