XREBS — W ESTINDIAN RlSSOINJ B. 
47 
1. Hissoina elegantissima Orb. 
JT Orbigny, Hist. Bat. Cuba, part 2 — p. 26 pi. xii. — 
f. 27—29. (1842). 
Schwartz von Mohrenstern , op. cit . p. 50, f. 12 
Habitat , Haiti, Cuba, Bahamas. 
2. Hissoina subangulata Adams 
C. B. Adams, Contributions to Conchology, p. 112, 
S. v. M. op. cit . p. 56, f. 20. [(1850), 
3. Hissoina scalar if or mis Adams. 
R, scalariformis C. B. Adams, Catalogue of Shells 
collected at Panama pp. 180, 314. (1852). 
Idem S. v. M op., cit. p. 59, f. 24. 
It. firmata (Adams) P. P. Carpenter, Proc. Zool. Soc. 
London, vol. p. 15 (1863). 
Habitat, Panama, Mauritius, the Red Sea, St. Thomas 
(Westmdies). 
Division II . — The shell with narrow longitudinal ribs 
without distinct transverse lines. 
a. With a distinct canal. 
1 . Hissoina dubiosa Adams. 
C t B. Adams in Contributions to Conchology, p. 114 
(1850). 
S. v. Jf. op. cit. p. 67. f. 31, 31a. 
A shell very like the fossil H. grateloupi Orb. and the recent 
H. pusilla Brocchi from Mauritius, the Sandwich Islands 
and perhaps the Mediterranean Sea. All three are per- 
haps varieties of the same species. It is found in collections 
in Germany under the name of H . dunkeri Pf. 
Habitat, Cuba, St. Thomas, Jamaica. 
b. Without a canal. 
