Catalogue Recently Described Mollusca 151 



PLEUROCERA Rafinesque, 1818. 



Pilsbry ( F05, p. 114) from a consideration of the literature concludes 

 that the type of Plcnroccra Raf. is verrucosa Raf. and that it consequ.ently 

 takes the place of Angitrcma Hald. and that for this group Ceriphasia Sw. 

 should be used. This has been controverted by Walker, Xo. 161, who argues 

 that the type of Plcnroccra had never been properly designated and desig- 

 nates P. acuta Raf. as the type, thus retaining the name for the group with 

 which it has commonly been known. In a similar case, Dall (20, p. 1141) 

 had alreadv taken the same position as advocated by Walker. 



PlEurocera acuta Rafinesque. 



Plcnroccra acuta Rafinesque, Enumeration and Account, 1831, p. 3; Walker. 

 Occ. Pap. ^lus. Zool.. U. of M., No. 38, p. 8. 

 Is identical with and has precedence over P. suhiilare Lea and is the type 

 of Plcnroccra Raf. It includes according to Goodrich (40, p. 122) tractnv.i 

 Anth., ncglcctnm Anth., lutcnsnm Rve., pallidum Lea and labiatum Lea. 



Pleurocera aefixe (LeaY. 



Trypanostouia affinc Lea. Obs., XI. 1866, p. loi, pi. 23, fig. 57. 



Pleurocera AI.TfPl•T^;^[ (Anthony). 



Trypanostouia conicnni Lea, Obs., XI, 1866, p. 104, pi. 2T,, fig. 63. 



Pleurocera alveare (Conrad). 

 Includes P. plicatuui Tryon. 



Pleurocera aratum (Lea). 



Trypanostouia cinctum Lea, Obs., XI, 1866, p. 103, pi. 23, fig. 60. 



Pleurocera ricixctum Tryon. 



Plcnroccra bicincfuiu Tryon, Am. J. of Con., II, 1866, p. 4, pi. II, fig. 2. 

 Type locality : Bridgeport, Ala. 



Pleurocera carixatum (Lea). 



Trypanostouia carinafnin Lea, Obs., XL 1866. p. 104, pi. 2T,, fig. 62. 



This species as suggested by Tryon is probably the young of some other 

 species. If. however, it should prove to be a valid one. it will have to be 

 renamed as Plcnroccra (Strcpliobasls) carinatnni Lea has priority. 



Pleurocera castaxeum (Lea). 



Trypanostouia casfancuin Lea, Pr. A. X^". S. P., t868, p. 152; [our. A. X'. 



S. P., VJ, 1868, p. 338, pi. 54, fig. 20; Obs., XII, 1868, p. 98, pi. 54, 



fig. 20. 

 Type locality : Coosa River, Ala. 



