494 Descriptions of New Species ofBullia and Marginclla. 



Species No. 37. M. cwrulcsccns. Lam. Fig. 185, referred to under 

 this title, as a dwarf variety, differs so much from the typical form, 

 that I am constrained to view it as a distinct species, and have little 

 doubt of its identity with M. Storeria of Couthouy, figured and de- 

 scribed in Bost. Jour. Nat. Hist., Vol. I. It is the same shell which 

 in Prof. Adams' catalogue is denominated M. imicolor, Lister. — 

 This latter name is given by Kiener as a synonyme of M. curta, 

 Sow. ; but by reference to Lister's work it will bo found that he 

 has nowhere so named any species of Marginclla. 



The established rules of nomenclature require Gmclin's name 

 prunum to be preferred to Lamark's ccerulescens. Mr. Sowcrby 

 merely gives the former as a synonyme. 



No. 45. M. clegans, Gmel. I cannot agree with Mr. Sowerby 

 in the propriety of uniting M. clegans, Gmel., and M. undulata, 

 Chemn. The differences in size and marking, conjoined with the 

 fact that one has six and the other but five plaits, seem to justify 

 previous authors in separating them. 



No. 51. M. conoidalis, Kiener. If this be really identical with 

 M. apicina, Menke — as I have supposed, and as Mr. Sowerby 

 states — the latter name should take precedence, having been ap- 

 plied in 1830. Sowerby's figures 97, 98, and 100 seem to repre- 

 sent M. flavida nobis, which is certainly closely allied to M. 

 apicina, and may prove identical, though I am still of opinion that 

 it is distinct. 



No. 58. M. triticea, Lam. Sowerby's shell cannot be the M. 

 triticea of Kiener if the figures of both authors are faithful. 



No. 80. M. guttata, Swainson. The name guttata had been ap- 

 plied by Dillwyn in 1817 to the shell afterwards known as M' 

 longivaricosa. Lam. Swainson's name will not therefore stand, and 

 we must fall back on Kiener's title M. maculosa. 



No. S5. ill. similis, Sow. This is identical with M. obesa nobis, 

 described and figured in this Journal in March, 184G, while Mr. 

 Sowerby's first description was not published until the close of the 

 same year. 



No. 88*. M. obesa, Sow. This name being pre-occupied as above, 

 this species must take another name. I would propose M. pt/ru- 

 ata. 



