Mr. W. Clark on some of the Animals of the Chemnitzise. 195 



Eccyliomphalus Scoticus (M'Coy). 



Desc. Discoid, flat, of one aud a half gradually enlarging, widely 

 separated, spiral whorls ; back obtusely subcarinate, rounded, 

 lower side rounded, upper side with a flat space, bounded on 

 each side by one obscure keel, the outer one most distinct ; sur- 

 face crossed by rather distant sharp lines of growth, each pair 

 with four or five much finer intermediate strise. Diameter 

 1 inch 5 lines, proportional diameter of last whorl /^% height 



_3JL 

 1 00" 



This species is more regularly involute than the E. Bucklandi 

 (Portk.), and has the principal keel on the upper side nearer to 

 the beak. There are three or four of the larger strise in the 

 space of 1 line about the middle of the under side of last whorl. 



Not uncommon in the schistose Chazey limestone of Knock- 

 dolhan quarry, three miles from Ballintrae ; also in the calcareous 

 schists of Mullock quarry, Dalquorhan, near Girvan, Ayrshire. 



{Col. University of Cambridge.) 



XIX. — On some of the Animals of the Chemnitzise which have 

 not been described. By William Clark, Esq. 



To the Editors of the Annals of Natural History. 



Gentlemen, Exmouth, July 20, 1852. 



I BEG to present, agreeably to a notice in the ^Annals,' N. S. 

 vol. X. pp. 22 and 77, an account of several animals of the Chem- 

 nitzice that have not occurred to naturalists or been very slightly 

 alluded to. My former papers and this will contain descrip- 

 tions of about twenty species, a number more than fourfold 

 greater than has yet been recorded, and most of which I have 

 this summer re-examined : I propose to follow up the accounts 

 of those that have just been met with by a few short additions 

 and corrections to the several species enumerated in the ' Annals,' 

 N. S. vol. vi. p. 451, vol. vii. p. 380, and vol. viii. p. 108. 



Before I enter on the descriptive matter, it will be proper to 

 say a word or two in explanation of some of the organs of this 

 v«ry singular genus, which, in my method, includes the Odo- 

 stomice and Eulimellce, and a few of the species of Aclis. 



With respect to the organs of the animal, I will first mention 

 the peculiar anterior process styled by most authors the mentum, 

 winch I think ought to be considered the muzzle or rostrum, as 

 it is a continuation of the neck, over which a bridge is thrown, 

 formed of the eyes and tentacula ; and close under them, but on 



13* 



