( ' raa reticulata and Cypraa Jiistrio distend. 



W nro in Index Testaceologicns, pi. 16, f. 1, which lie 



mils C. Itittfio, represents only the back of the shell, and it is diffi- 



i to decide to which species it should he referred ; hut in form 

 it i • to the ('. reticulata than to Jiistrio. 



rviener'a splendidly illustrated Monograph, which appeared in 

 1843, gives a beautiful figure of the true reticulata, but Ik 1 terms 

 it Jiistrio, while he figures the true Jiistrio under the title of variety 

 of C. arabica. 



Deshayes, in his late edition of Lamarck's Animaux pans Ver- 

 i. lues, also commits the same error, by adding Martyn's figure to 

 Lamarck's quotations, and by asserting the identity of the two spe- 



- in a note. 



Reeve, in his Conchologia Tconica, the latest authority on this 



nus, figures the true reticulata, and under its proper name, but 

 ( '. Jiistrio as a synonym, showing that he also considered them 

 identical. 



[Tavinc thus shown the origin of the confusion which has existed 

 in regard to these Bpecies, and having traced the continuance of 

 the error, I propose the following corrected synonomy and detailed 

 description for each, preparatory to pointing out their distinctive 



■ . i:r.\ Reticulata. Martyn, PI. XVI. P. 1. 



('. testd ovata, super convexa, castanea, albidb ocellata, linefi dor- 

 Bali subcentrali, Bubsinuosa ; lateril us albido-lividis, aut plumbeis, 

 incrassatis, nigro maculatis : basi subplana-, albido-livida, labio sin- 



Utro macul.'i hilt. i magna notato j rima suhcurva, dentibus casta- 

 neis, exttis Bubproductis. 



BYNONOMY. 



' ,prira reticulata. Marlyn, 1781. I 'nivrrsal ConchologV, pi. 1 .".. 



C arl C lemnitz, 1 788. Com-h. Cab. VoL X.. p. 112. 



C. Mttrio, pat . Gmelin, 178'J. 15th edition of Bystema Nature, 



p. 3 103. 

 C " ticulata. do. do. do. 



p 3 

 toono, pan DUlwyn, 1817. Descriptive Catalogue, Vol. I., p. -139, 



No. l 



