4:8 [ DECEMBER, 
labrina Chevr. and L. convexa Lec., already known from that region, are also 
contained in the collection. 
‘The Committee on Dr. Leidy’s paper on “ Bathygnathus borealis, an 
extinct Saurian of the new Red Sandstone of Prince Edwards Island,” 
reported in favor of publication in the Journal. 
The Committee on a paper by Mr. Conrad, “‘ Monograph of the genus 
Argonauta, with descriptions of five new species,” reported in favor of 
publication in the Journal. 
The Committee on the two following papers by Mr. Conrad, reported 
in favor of publication in the Proceedings. . 
Synopsis of the Genera CassipuLa, Humph., and of a proposed new genus ATHLETA. 
By T. A. Conran. 
CassipuLa, Humph., Metonerena, Schum. 
The genus Casstputa was founded by Humphreys on Buceinum calearatum - 
(Solander,) who included Murex melongena, Lin. and a Florida shell which he 
terms JM. cornuta, and cites Bucctnum trames, Solander. This may be Marez 
corona, Gmel. 
I know of but one fossil species of this genus, if indeed it really belongs to it, 
in the Eocene formation. I propose it at present as the type of a subgenus, to 
which I can refer no other species. 
Subgenus Lactnia, Con. 
Globose; pillar lip widely reflected, callous; basal emargination profound ; 
base dilated. 
[ have given a name to this subgenus which Humphreys applied to some un- 
known shell without describing it. 
Fossil species, (Eocene.) 
C. (Lacinia) ALVEATA. 
Melongena alveata, Silliman’s Journ. Jan. 1833, xxiii, p. 344: Con. Tert. 
Foss. p. 37, pl. 10, fig. 2. 
Pyrula Smithii, Lea. Cont. to Geol. p. 153; pl. 5, fig. 162. Dec. 1833. 
Locality. Claiborne, Alab. 
Miocene species. 
C. Lainri, 
Pyrula Lanei, Bast. Gratetourp. Conch. Foss. des Terr. Tert. Pl. 1,; 
fig. 2, 3, 8. 
C. strompBorpes. Pyrula stromboides, Bast. Grat. ib. 2, d 
Recent Species. 
C. HIPPOCASTANUM- 
Murex hippocastanum. Born. Mus. 1780, p. 309. Dillwyn. Cat. p. 710. 
Buccinum calcaratum, SOLAND. 
Casstdula calcarata, Humen. Cat. 1797, p. 32. 
Murex calcaratus, Dituwyn. Cat. p. 710. 
Pyrula galeodes, am. An. sans vert. (Desh. ed.) ix. p. 517. Reeve. Mon. 
Pyrula, No. 22. 
Inhabits Island of Samar, Philippines. 
C. MELONGENA. / 
Murex melongena, Lin. Martini. il. p. 74. t. 39, fig. 389. Dillwyn, Cat. 
p- 710. 
Pyrula melongena, Lam. An. sans Vert. ix. p. 509. 
Inhabits the West Indies. 
C. BISPINOSA, ; 
Pyrula bispinosa, Puruiprt, Abb. und Beseh. Conch. Pyrula, pl. 1, fig. 7, 8. 
Reeve. Pyrula, No. 18. 
Inhabits 
