[From Journal of the Academy of Natural Sciences of Philadelphia, Vol. viii, Part II, 1876.] 
Uivision of Molluaing 
A DESCRIPTIVE CATALOGUE 
OF THE 
SCALIDH OF THE WEST INDIA ISLANDS. 
By O. A\ L. Morcu, Ph.D. 
OBSERVATIONS. 
The present paper was originally destined to be part of a descriptive Catalogue 
of the collection of the late Robert Swift, of St. Thomas and Philadelphia; but 
additions from the collections of Mr. Henry Krebs and Mr. A, H. Riise and others 
have much increased the material not only in new species, but especially in nume- 
rous specimens in well-selected suites representing varieties and geographical 
distribution. 
It was the intention to figure not only the new species, but also those rarer 
ones already figured only in rare or costly works; but circumstances have com- 
pelled a change of plan, and limit the illustrations to a single plate. 
CoPpENHAGEN, May, 1875. 
The Scalide of the West Indies. 
The species of the genus Scala of Klein were by Linné associated with Turri- 
tella, Clausilia, &c. in the genus Turbo, from which Lamarck separated it under 
the name Scalaria ; distinguishing it by its numerous varices from Turritella. A 
knowledge of the animal and its anatomy has, however, shown that those two 
genera are widely different; Turritella belonging to the Diorca, order Tenioglos- 
sata (Troschel), having seven rows of teeth with reflected edges, proving its phyto- 
phagous habits; Scala, on the contrary, to the ANDROGYNA, order Ptenoglossata, 
having subulate multiseriate teeth wanting the median or rhachial tooth. This 
latter circumstance proves that the animal, like Testacella and Ianthina, swallows 
its food entire or in large morsels. In fact, Scala grénlandica feeds (according to 
Dr. Gould)* eagerly on fresh beef, especially if somewhat macerated. In the form 
of the teeth and in their predacious habits, the Scalide agree with lanthinide, in 
* Gould, Invertebrata of Massachusetts, 1841, p. 250. 
48 (189 ) 
OCT 2 € 1988 
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