8 Notes on certain Terrestrial Mollusca^ 



With respect to the shell of E. Newcomhianum^ I should 

 mention that the axis has not the revolving fold descrihed as 

 generally present in Eucalod'mm^ — indeed Gabb's species is, 

 in internal structure, more like Achatina. 



The genus Eucalodium^ looking at the form of jaw and teeth, 

 must go into Gray's section Phyllovora. Considering the sta- 

 tion of the West Indian Cylindrellee, so far as I am acquainted 

 with them, and otlier circumstances, I believe with Crosse and 

 Fisclier, and also Pfeiffer, that the genus Cylindrella itself 

 cannot be associated with the Vermivora. 



It is worthy of notice that Mcirch places IT. concava Say, 

 from the form of jaw^ {see Terr. Moll. I. xii. fig. 11), in his di- 

 vision Oiicfjgonatha^ the teeth of which (laterals subulate) indi- 

 cate, he says, ^* que I'aninial avale de grands morceaux, et non 

 que c'est un carnivore qui vit de proies vivantes," and adds, 

 "les A(/nathcs, qui avalent leur proie entiere ct vivante, ont 

 toutes les dents subidecs." {Jour, de Conch, v. 377, 1805.) 

 The fact is that the animal of //. concava^ having one median 

 tooth and subulate laterals {3Iorse, 1. c. pi. 5), devours the 

 living animals of other species,'^" while Ci/lindrella^ without 

 jaw {Agnatha)) has no subulate teeth ! 



After the foregoing pages w^ere in type, I discovered that the 

 shell under consideration was described by Pfeiffer {Proc. 

 Zool. Soc. 1801, p. 27, pi. ii. fig. 7), from a specimen in Cum- 

 ing's collection, as follows: 



Clausilta t (Balea ?) Tayloiu, Pfr. T. profunde rimata, tur- 

 rita, solidula, confcrte plicato-striata, corneo albida ; spira regula- 

 riter attenuata, apice acutiuscula ; sutuni simplex ; anfr. ll,convex- 

 iusculi, ultimus basi vix attenuatuB, infra medium obtuse carinatus ; 

 antice solutus, descendens et dorse acute carinatus ; apertura 



* "The animal is voracious in its appetite, almost alvva3'3 prejing upon other spe- 

 cies with which it may be kept, and so certainly destroying them that I have been 

 obliged to keep them by themselves." {Binncy^ Teri\ Moll, II. 1G5.) 



\ The jaws of Clausilia and Baka are described {Die Heliceen) as being very 

 similar, — the former "arcuata, subtiliter striatula, medio srepius prominula," and of 

 the latter "parum arcuata, subtiliter striatula, medio prominuln." 



