26 THE NAUTILUS. 
are one or two of the rarer species of Spiraxis described by Adams 
that are suggestive of Ravenia. An examination of the types of 
these may necessitate their removal from Spirazis. 
Note.—I am inclined to believe that the relation between the 
Jamaican Glandinas and the various genera of Stenogyra found in 
the same island is much closer than supposed. Often the dividing 
line between Opeas, Subulina and Varicella is annoyingly close. It 
is to be regretted that a comparative anatomical study of the Glan- 
dina and Stenogyra in Jamaica has never been made. 
LAND SHELLS OF GUN CAY, BAHAMAS. 
BY HENRY A. PILSBRY. 
Gun Cay is a tiny islet on the extreme western border of the 
Bahama group. It is low, with very scant vegetation—‘“‘a few 
scattered specimens of cactus, wild grapes, wild geraniums and ver- 
bena’”’—with the usual Bahaman shore plants. There is a light- 
house, but no settlement. 
Dr. Wm. H. Rush, U.S. N., some years ago collected there the 
following species : 
1. Ctenopoma bahamense Shuttl.? One very young specimen. 
2. Cepolis (Hemitrochus) sp. (young; rib-striate, like C. filicosta 
Pir.); 
3. Thysanophora vortex Pfr. 
4. Cerion incanum Binney. Basal volution more distinctly cos- 
tate than in Key West examples. 
5. Cerion Pillsburyi Pilsbry & Vanatta.’ A new form resembling 
C. regina, but with narrow umbilical area. It is named at the re- 
quest of Dr. Rush, in honor of Lieutenant-Commander John Elliott 
Pillsbury, of the U. S. Coast Survey steamer “ Blake.” 
6. Cerion glans Kister, var. 
The only previous record from this islet isin Bull. Mus. Comp. 
Zool., vol. xxv, no. 9, p. 119, 1894, where Dall enumerates three spe- 
cies collected by Prof. A. Agassiz: Cerion cinereum, C. pannosum 
and Cepolis (Hemitrochus) Troscheli. The young Hemitrochus 
taken by Dr. Rush may be an immature Troscheli, but it is more 
strongly ribbed than usual] in that species. 
1 Described in Proc. Acad. Nat. Sci., Phila., 1897, p. 366. 
