Genera of Terrestrial Mollusca, etc. 201 



ratis, inoequaliter bicuspidatis (dente medio tricuspidato) 

 instructa."* 



With respect to X. Salleanus and Cordovanus, the authors 

 state, on the authority of Salle, that the animals are much 

 larger than their shells, as in X. Samichrasti. 



Xantlionyx, as well as /Si'mpulopsis, belongs to Helicince 

 and not to Succinince. 



§iiccixBea Drap. 



Am/phihulima. — Albers (l. c, 309) gives as the type of 

 this section of Saccinea, A. patula Brng., but without 

 any special description of animal or its dentition. 



Guppy (Ann. and Mag. Nat. Hist., June, 1868) mentions 

 the occurrence in Dominica of A. patula, and we were in- 

 debted to him for the lingual membrane (without jaw), of 

 which we published figure and description in Amer. Jour. 

 Conch. VII, 186 (1871), pi. xvii, fig. 1-2. Guppy does not 

 particularly notice the animal, and we assume in consequence 

 that, as in /Succinea s. s., it is capable of retraction withiu 

 the shell ; indeed the form and character of the shell pre- 

 clude any other suppcjsition. 



Guppy (/. c, June, 1868) describes another species, found 

 by him in Dominica, as AnipldbuUma pardalina, the animal 

 of which he describes as follows : — 



"The animal resembles that of Omalonyx unguis Fer. 

 (D'Orb. Voy. Amer. Mer. pi. xxii, fig. 1-7). The foot is 

 translucent, like a bit of ice dipped in milk, the internal 

 organs showing as a dark, variegated patch about the shell, 

 into which the body is incapable of retraction." 



Guppy adds (and apparently he was acquainted with the 

 dentition [not the jaw], of A. patula only) : 



*Fischer aucl Crosse (Etudes sur les Moll. Terr, et Fluv. da Mexique et du Guate- 

 mala, l'.J2-199, pi. 9, figs. 14-17} give a more detailed description of Xantlionyx, and 

 remark on certain of its aflinities witli the genus Binneya. The part of the work 

 referred to reached us after our manuscript was in the printer's hands. 



