480 Mr. It. Etheridge, Jun., on the Gasteropoda 



with some matrix attached to it, not shown in the illus- 

 tration. 



This is a bluntly conical species, with a rather expanded 

 base as compared with the height of the spire, the only break 

 in the continuity of the cone being the slightly impressed 

 sutures, there being no shoulder or upper flattened sur- 

 face to each whorl as in many species of Euomphalus. It 

 is a connecting link between E. Dionysii and E. rotundatus. 

 The base is much flattened, becoming concave, with a by no 

 means large umbilicus ; spire short. The surface is orna- 

 mented with obliquely sigmoidal, crossed in some specimens 

 by fine spiral lines. Very little appears to have been written 

 concerning this species. It is the 



Cirrus spiralis, Phillips, loc. cit. ; Moms, Cat. Brit. Foss. 1843, p. 142 ; 

 Bronn, Index Pal. Nomen. 1848, p. 302 ; Brown, Foss. Conchol. 

 1849, p. 80, t. 41. tig. 18. 



The name Euomphalus spiralis has been twice applied by 

 Von Minister to shells described in the ' Beitrage ' * ; but as 

 one bears date 1840 and the other 1841, neither will clash 

 with Phillips's species, which, whether we call it Cirrus or 

 Euomphalus, has priority. It appears to me that the two shells 

 so named by Von Minister on different occasions are specifi- 

 cally distinct. 



On the Species named Euomphalus and Cirrus by Phillips. 



The use of the names Straparollus, De Montf., Euomphalus, 

 Sow., and Cirrus, Sow., has been made the subject of much 

 confusion by conchologists and palaeontologists. In the 

 following remarks I shall endeavour to distribute the species 

 described by Phillips, appertaining to one or other of these 

 genera or subgenera, whichever term may be used, in their 

 proper and respective sections. With this view it will be 

 necessary to go over, to some extent, the early history of the 

 names in question. 



Straparollus was established by Denis de Montfort in 

 1810f for a cirroid shell from the Carboniferous Limestone of 

 Namur, which, he remarked, possessed a large and smooth 

 umbilicus, and an entire and inclined mouth : type S. Dio- 

 nysii, De Montf. 



Euomphalus was first introduced by James Sowerby in 

 1814 J for an involute planorbicular shell with a depressed 

 spire, and concave or largely umbilicate below, the mouth 

 being " mostly angular :" type E. pentangulatus, Sow. 



* Beitrage zur Petrefactenlumde &c. Heft 3, 1840, p. 85, t. 15. fig. 8 ; 

 ibid. Heft 4, 1841, p. 105, t. 11. fig. 2. 



t Conchyl. System, ii. p. 175, xliv° genre. \ Min. Conch, i. p. 07. 



