344 Mr. F. P. Pascoc on new Oenera and Species of 



D. Blanfordiana^ Bens. D. lahiosa, W. Bl. 



D. pulhila, Bens. D. gibbosa, W. Bl. 



D. semisculpfa, W. Bl. 



In the latter it is not so strongly marked externally ; but, as 

 in several others, there is a distinct internal rib. 



In almost every species I can detect a slight constriction, 

 even in the forms from Southern India {Nicida). Its being- 

 noticed in Diancta appears principally due to its occumng at 

 the back of the shell ; but it is far from constant in position. 

 In some Indian forms it is on the penultimate whorl behind 

 the lip, in others in the middle of the peristome. 



The character of the shell in Diplommatina is exactly similar 

 to that in Alycceus^ and quite different from other Cyclopho- 

 ridee. There is a complete absence of the coloured markings 

 so characteristic of Gyclopliorus^ Cyclotus, Pterocyclos^ and 

 their allies ; there is, as a rule, no epidermis, or only a very 

 thin one ; and the structure of the shell is different, more horny 

 and less calcareous. The sculpture, too, is quite different in 

 general from that of the Cyclophoringe. 



I am therefore disposed to consider that Diplommatina and 

 its various subgenera Palainaj Diancta^ Nicida^ &c., with 

 Opisthostonia, ? Clostophis, and Alycceus, form a very natural 

 subfamily of the Cyclophoridae distinguished by the peculiar 

 structure of the shell and the presence of a constriction. This 

 subfamily should be called Altcjein^. 



I have not examined the lingual ribbon of Diplommatina ; 



that of an Alyco'us from Upper 

 Burma [A. Vulcani, W. Bl.) is 

 represented herewith. It is quite 

 of the Cyclophoroid type ; but 

 Lin-ual teeth of Ali/cmis the outermost laterals do not ap- 



Vukani. pear to be denticulated. 



XLII. — Descriptions of new Genera and Species of Tene- 

 brionidaj from Australia and Tasmania. By FeaNCIS P. 

 Pascoe, F.L.S. &c. 



[Concluded from p. 296.] 



Notwithstanding the following additions to the genus Ama- 

 ryymus'^j there still remains a considerable number of species, 



• Dahnan, Anal. Entom. p. 60. M. Blessig separates the Australian 

 species of the p^enus, under the Jiame of C/xilcopferm, on account of tlio 

 mandibles of the latter being entire at the end, not bifid. (II or. Soc. Eut. 

 Ross. fasc. i. p. 108.) 



