506 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxiv. 
SCALA SCIPIO Ball. 
Plate XXIX, fig. 10. 
Scala scipio Dall, Rep. Blake Gastr., Bull. Mus. Comp. Zool., XVIII, Apr., 1889, 
p. 310. 
Cape Hatteras, North Carolina, to Vera Cruz, Mexico, in 10 to 16 
fathoms. U.S.N.M., 10694. 
The species is characterized by its livid pink color, gflistening sur- 
face, and white varices. 
SCALA (AMyEA) MITCHELLI Dall. 
Plate XXX, figs. 3, 4. 
Scala mitcheUi Dall, Nautilus, IX, No. 10, Feb., 1896, p. 112. 
Matagorda Island, Texas, by J. D. Mitchell. -U.S.N.M., 132788. 
The shell is yellowish white, with the basal area and a band above 
the periphery dark reddish brown; the sculpture recalls /S. inagnifica. 
SCALA (CIRSOTREMA) COCHLEA Sowerby. 
Plate XXX, fig. 7. 
Scalaria cochlea Sowerby, Thes. Conch., Scalaria, 1847, p. 103, pi. xxxv, fig. 142 
(only). 
Scala {Cirsotrema) cochlea Morch, Journ. Acad. Nat. Sci. Phila., VIII, 1876, p. 
205. 
Off Hatteras, North Carolina, in 124 fathoms, sand, and Gulf of 
Mexico, near Cedar Keys, in 25 fathoms; U. S. Fish Commission. In 
the West Indies, at St, Thomas, St. Croix, Santo Domingo, and Tortola 
(in mud, 1 to 2 feet of water. Swift). U.S.N.M., 93710. 
This fine shell is of a whitish or slightly ferruginous color, with a 
black opercukmi. It reaches a length of over 40 mm. The specimen 
figured is from the northern part of the Gulf of Mexico. Sowerbj^'s 
reference to Loanda, west coast of Africa, in connection with this 
species in the Thesaurus, is regarded b}^ Morch as an error, though it 
is included by Dunker in his catalogue of the Loanda collection of 
Tarns. 
SCALA (ACRILLA) RETIFERA Dall. 
Plate XXX, fig. 9. 
Scala {Acrilla) retifera Dall, Rep. Blake Gastr., Bull. Mus. Comp. ZooL, XVIII, 
1889, p. 312. 
Off the coast of North Carolina, in 49 to 63 fathoms, bottom tem- 
perature 75° F. U.S.N.M., 83733. 
The color of the shell is pale olive, grayish, or whitish, with a white 
callus on the inner lip. 
