LOTTIA. 



TESTA patelliformis, plerumque depressiuscula, 

 vertice aotico, prope marginem antieam inciim- 

 bente, nonniniquam fere marginali : impressione 

 musculari non symmetrica, latere antico dex- 

 trali latiore : disco ceo trali interno plerumque 

 fusco-vario. 



A Genus of pateliiform shells scarcely distinguishable from 

 Patella except by the characters of the animal. It has 

 been named Patelloides by Qiioy and Gaimard, who have 

 given representations of several species with their animals 

 in the voyage of the Astrolabe. Mr. Gray rightly 

 judging that the name of Patelloides ought not to be 

 retained, as being only fit for use as a specific appellation, 

 has named it Lottia, under which name he has mentioned 

 it in the Philosophical Transactions. We cannot help 

 regretting that it should be necessary for us to adopt a 

 name without signification, and only do so in this instance 

 because we wish to avoid the greater evil of multiplying 

 the generic appellations of the same object. This Genus 

 is one of many which demonstrates the positive necessity 

 of becoming acquainted with the moUuscum itself, as well 

 as with the shell which it forms, and which is indeed one 

 of its most important parts. It is well known that in Patella 

 the branchiae extend from near the head in two symmetrical 

 rows placed above the foot and between it and the mantle 



