104 AMERICAN JOUKNAL 



NOTES ON RECENT MOLLUSCA. 



BY T. A. CONRAD. 



Pleiodon Macmurtrei, Conrad, 



Swainson's original Latin description of Iridina ovata reads 

 " testa Isevi, transversim ovata,'" but his translation reads " trans- 

 versely oval.'' The form of the shell known as I. ovata is nei- 

 ther the one nor the other ; it is elliptical, whilst the P. Macmur- 

 trei is perovate. Swainson says the umbones are placed nearly 

 in the middle of the hinge margin, in his species, but in the for- 

 mer they are much nearer the anterior extremity. It has been 

 suggested that our shell has received an injury, but this is a slight 

 deformity of a portion of the ventral margins. The broad and 

 prominent umbo, ovate and shorter form distinguish it from P. 

 ovata, independent of any accident. 



P. ovatus, Adams, Genera pi. cxix, fig. 2, is a species distinct 

 from either of the above mentioned, and probably undescribed. 



BusYCON carica. Lam. 



By some unexplicable oversight the name of Bliirex ariiana, 

 Bumphius, 1705, was applied by me to £. carica. Linne's first 

 reference to a figure is that of 3Iurex aruana, Rumphius, but his 

 description and second reference to a figure in G-ualtieri apply 

 to B. carica. This singular error is continued in several editions 

 of Syst. Nat. 



B. gihbosum, Con., is erroneously given a synonym of B. 

 Kie7ieri. It should stand thus : 



B. ELICEANS, Montfort. B. gibbosum, Con. 



CONUS, Lin. 



C. Stearnsii, Conrad. — PI. 10, fig. 1. 



Description. — Subfusiform ; sides nearly straight ; spire ele- 

 vated, acute, longitudinally wrinkled; sides nearly rectilinear, 



