TITLES. 
Moll . 15 
247. Pilsbry, H. A. Pleurotomaria crotaloides , Morton, in the New 
Jersey Cretaceous. P. Ac. Philad. 1896, pp. 10 & 11, 1 pi. 
248. . New species of the Helicoid genus Polygyra. T. c. 
pp. 15-20, 1 pi. 
249. . Descriptions of new species of Mollusks. T. c. pp. 21- 
24. 
250. . A remarkable Central American Melanian [ Pachycheilus 
dalli , n. sp.]. T. c. pp. 269 & 270, figg. 
251. . New species of freshwater Mollusks from South America. 
T. c. pp. 561-565. 
252. -. The Aulacopoda, : a primary division of the Monotremate 
land Pulmonata. Nautilus, ix, pp. 109-111. 
253. . Sculpture of the apical whorls, a new character for dis- 
tinguishing groups of Bulimuli. T. c. pp. 112-115. 
254. . Description of a new Gastrodonta \_G. collisella]. T. c . 
pp. 123 & 124. 
255. . New American Ancylidcc. T. c. pp. 137-139. 
256. . A new variety of P unctum. T. c. pp. 21 & 22. 
257. . A new species of Pomatiopsis [P. hinJcleyi\. T. c. 
pp. 37 & 38. 
258. . A new species of Bulimus [ Anctus (?) stearnsianus], Op. cit. 
x, p. 41. 
259. . Note on Bulimus hanleyi and B. coronatus. T. c. p. 46. 
260. . Notes on some West American Chitons. T. c. pp. 49-51. 
261. . Notes on new species of Amnicolidcc collected by Dr. Rush 
in Uruguay. T. c. pp. 86-89. 
. [See also Tryon (355, 356).] 
262. Pilsbry, H. A., & Rhoads, S. N. Contributions to the zoology of 
Tennessee. No. 4. Mollusks. P. Ac. Philad. 1896, pp. 487-506. 
263. Pilsbry, H. A., & Rush, W. H. List, with notes, of Land and 
Freshwater Shells collected by Dr. W. H. Rush in Uruguay and 
Argentina. Nautilus, x, pp. 76-81. 
Contains several nomina nuda. 
264. Pilsbry, H. A., & Vanatta, E. G. Catalogue of the species of 
Cerion , with descriptions of new forms. P. Ac. Philad. 1896 
pp. 3 1 5-338, 1 pi. 
265. & . Revision of the North American slugs, Agriolimax 
and Aphallarion [n. g.]. T. c. pp. 339-350, 3 pis. Abstr. in J. R. 
Micr. Soc. 1896, p. 615. 
266. Plate, L. Ueber die Organisation einiger Chitonen. Yerb. 
Deutsch. Zool. Ges. 1896, pp. 168-176. 
267. . Ueber einige Organisationsverhaltnisse der Chitonen. SB. 
Ges. naturf. Berlin, 1896, pp. 42-50. 
268. . Ueber die Buccalmuskulatur der Chitonen. T. c. pp. 68 & 69. 
269. . Ueber den Habitus und die Kriechweise von Ccccum auricu- 
latum , De Fol. T. c. pp. 130-133, figg. 
270. . Ueber die Anatomie des Bulimus ovatus , Sow., und des 
B. proximus, Sow. T. c. pp. 149 & 150. 
