260 REPORT ON ALBATROSS MOLLUSCA DALL. 



Area glomerula Dall. 



A. glomerula Dall, Bull. Mus. Comp. Zool., ix, p. 121, 1881 ; xn, p. 241, PI. vm, Figs. 



9,9a, 1886. 

 A. inwquisoulpta E. A. Smith, Cball. Rep., Lam., p. 267, PI. xvn, Figs. 8a-8c, 1885. 



This species was obtained at Station 2750, iu 497 fathoms, sand, off 

 the island of St. Bartholomew, West Indies; temperature 44°.4. 



Area pectunculoides var. orbiculata Dall. 



A. var. orbiculata Dall, op. cit,, ix, p. 121, 1881 ; XII, p. 210, PI. vm, Fig. 5, 1886. 



This species was obtained at Station 2751 in 6S7 fathoms, globigerina 

 ooze, south of St. Kitts, West Indies; temperature 39°.9 F. 



Genus PECTTJNCULUS Lamarck. 



Pectunculus vuidatus Liun6. 



P. undatus (Liune) Dall, Bull. Mus. Comp. Zool., xn, p. 238, 1886. 



This species was obtained at Station 2758, 90 miles southeast from 

 Cape San Roque, Brazil, in 20 fathoms, shelly bottom. South of this 

 station where the genus occurred it was represented by the Patago- 

 nian form which occurs on both coasts of the southern part of South 

 America. 



Order TELEODESMACEA. 



Suborder CARDITACEA. 



Family CRASSATELLIDiE. 



Genus CRASSATELLA Lamarck. 



Crassatella floridaua Dall. 



Plate xi, Fig. 4. 



Crassatella floridana Dall, Bull. Mus. Comp. Zool., ix, p. 131, 1881 ; xn,p. 256, PL vi, 

 Fig. 12, 1886. 



Hab. — Gulf of Mexico and southeastern coasts of the United States 

 at IT. S. Fish Commission Stations 2372, 2409, 2410, 2595, 2596, 2597, 

 2598, 2604, 2606, 2607, 2608, 2610, and among the Florida Keys in 3 

 fathoms, living, by Lieut. J. F. Moser, U. S. Navy. The species ranges 

 in depth from 3 to 50 fathoms, is commonest in about 25 fathoms, and 

 has been found in temperatures of 73°.5 to 80° F. 



This fine species was originally described and figured from a young 

 shell. The adults obtained as above by the U. S. Fish Commission en- 

 able me to figure the adult. The largest valve obtained measured 78 mm 

 long and 57 mm high. The complete shell must have had a diameter of 

 about 31 miu . When fresh it is covered with a bright reddish brown 

 epidermis, which becomes fibrous after death and maceration or iu very 

 aged specimens. The margins are smooth at all ages. In aged speci- 

 mens the outside longitudinal grooving becomes obsolete near the mar- 



