184 Mr. H. A. Pilsbry on the Genus Tebennophoms. 



Saturnidae. 



58. Henucha dentata, sp. n. 



Expanse 2f inches. 



Female. — Closely allied to //. Delegorguei, Boisd. ; the outer 

 margin of the fore wing much more irregular, being bowed 

 outwards at middle and more dentate ; the outer margin of 

 hind wing also is slightly more dentate. Both wings are 

 much more suffused with fuscous than in Delegorguei, and 

 the white band inwardly banding the outer area reaches the 

 inner margin of fore and hind wings close to the outer and 

 anal angles, instead of a good distance inside them, 



Ommatophoridae. 

 59. Cyligramma argillosa } Walk. 



Ophiusidae. 

 60. Achcea Lienardi, Walk. 



XXI. — Critical Notes on the Genus Tebennophorus and the 

 recent Literature relating to it. By Henry A. PlLSBRY, 

 Conservator of the Conchological Section, Academy of 

 Natural Sciences of Philadelphia. 



The slugs of this genus having been commented upon lately 

 by a number of English and continental authors, who have 

 arrived at very different results, it has occurred to the writer 

 that a presentation of the subject by one who has studied the 

 species in their native forests would not be without interest. 



Firstly, regarding the proper name for the genus. We 

 will consider the several designations in the order of their 

 publication. 



In 1817 Blainville proposed a genus Limacella with the 

 following characters : — 



" Body limaciform, entirely naked, provided with a foot as 

 wide as itself, but separated by a groove. 



" Orifices of the organs of generation widely separated and 

 communicating between each other by a furrow which occupies 

 the entire right margin of the body." 



Blainville refers to his plate ii. fig. V, illustrating the type 

 species, L. lactiformis. 



A moment's reflection will convince any competent mala- 



