with Descriptions of X w 8} 



The teeth of K Newcombianum (fig. 3) in arrangement and 



form agree very closely with those of Euoalodium, as .1. 

 by Crosse and Fischer, and the formula 32 I 32 \ L2< 

 markably similar. In my figure the median and adjoining 

 lateral teeth, and also the extreme lateral tooth (iig. 3, a.) are 



shown. The teeth in general character may be < pared with 



those of H. alternate Say (Morse^ Terr. Pulmon. of 1/ 

 pi. 4, fig. 16). 



With respect to the shell of K N&wo&mbianum, [should 

 mention that the axis has not the revolving fold described as 

 generally present in Eucalodivm, — indeed Gabb's spe< 

 in internal structure, more like Achatina. 



The genus Eucalodium, lookiug at the form of jaw and teeth. 

 must go into Gray's section PhyUovora. Considering the 

 tion of the West Indian CylindreHae, bo far ae I am acquainted 

 with them, and other circumstances, I believe with I and 



Fischer, and also Pfeiffer, that the genus CylindrtUa il 

 cannot be associated with the Vermwora. 



It is worthy of notice that Mo'reh place- //. . , ■ gay 

 from the form of jaw (see Terr. Moll. I. xii. fig. 1 1 }, in his di- 

 vision Oxygonatha, the teeth of which (lateral- Bubulate) indi- 

 cate, he says, "que l'animal avale de grande morceanx, el mom 

 que c'est un carnivore qui \ it de proies rivantes," and a< 

 "les Agnnthes. qui avalent leur proie entiere et vivante, ont 

 toutes les dents snbulees." {Jour. cU Conch, v. '■'•", l vi 

 The fact is that the animal of //. concava, having one ined 

 tooth and subulate laterals {Morse^ I.e. pi. 5), d< 

 living animals of other species, 4 while CylindreUa^ with 

 jaw (Agnatha), has no subulate teeth ! 



After the foregoing pages were in type, I disc 



shell under consideration was described by I't.iti. i /', 



* "The animal is voracious in its appetite, almi 

 cies with which it may be kepi, and ■ iro been 



obliged to keep them by th< >ras [B\ II 



