4 [8 [December, 



labrina Chevr. and L. convexa Lee, 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 Cassidula, Humph., and of a proposed new gentis Athleta. 



By T. A. Conrad. 



Cassidula, Hiimph,, Melongena, Schum. 



The genus Cassidula was founded by Humphreys on Buccinum calcaratum. 

 (Solander,) who included Miirex rnelongena, Lin. and a Florida shell which he 

 terms M. cornuta, and cites Buccinum trames, Solander. This may be Murex 

 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. 



Suhgemis Lacinia, Con. 



Globose ; pillar lip widely reflected, callous ; basal emargination profound ; 

 base dilated. 



1 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 a^t;eaia, Silliman's Journ. Jan. 1833, xxiii, p. 344 : Con. Tert. 



Foss. p. 37, pi. 15, fig. 2. 

 Pyrula Smithii, Lea. Cont. to Geol. p. 153 ; pi. 5, fig. 162. Dec 1833. 

 Locality. Claiborne, Alab. 



Mioce7ie species. 

 C. Lainei, 

 Pyrula Lanei, Bast. Grateloup. Conch. Foss. des Terr. Tert. PI. 1, 

 fig. 2, 3, 8. 

 C. STROMBOiDES. Pyrula stromhoides. Bast. Grat. ib. 2, 3. 



Rece?it Species. 



C. HIPPOCASTANUM. 



Murex hippo castamim. Born. Mus. 1780, p. 309. Dillwyn.Cat. p. 710. 



Bicccinum calcaratum, Soland. 



Cassidula calcarata, Humph. Cat. 1797, p. 32. 



Murex calcaratus, Dillwyn. Cat. p. 710. 



Pyrula galeodes. Lam. An. sans vert. (Desh. ed.) ix. p. 517. Reeve. Mon. 



Pyrula, No. 22. 

 Inhabits Island of Samar, Philippines. ' 



C. melongena. 



Murex melongena, Lin. Martini, ii. p. 74. t. 39, fig. 389. Dillwyn, Cat- 



p. 710. 

 Pyrula nnelongena, Lam. An. sans Vert. ix. p. 509. 

 Inhabits the West Indies. 



C. BISPINOSA, 



Pyrula bispinosa, Philippf, Abb. und Besch. Conch. Pyrula, pi. 1, fig. 7, 8. 



Reeve. Pyrula, No. 18. 

 Inhabits 



