216 BULLETIN OF THE 



Triodopsis Harfordiana. 



Ancey suggests commutanda, and Tryon Salmonensis, as a substitute for the 

 name Harfordiana. I retain the last name, it not being preoccupied in the 

 genus Triodopsis. 



Prophysaon Andersoni? 



Specimens collected by Mr. Hemphill at Old Mission, Coeur d'Alene, Idaho, 

 appear to agree with specimens of this species received from Dr. Cooper. The 

 jaw is low, wide, slightly arcuate, with over 12 broad, stout ribs, denticulating 

 either margin. The lingual membrane is given in Plate II. Fig. 2. The 

 central and lateral teeth are slender and graceful. The latter have, apparently, 

 a second inner cutting point, as is found in Limax agrestis. I have so figured 

 it, hoping to draw attention to it, and thus settle the question of its being 

 there. 



Hemphillia. 



Plate IV. 



From Old Mission, Cceur d'Alene, Idaho, Mr. Henry Hemphill has sent me 

 fine large specimens of Hempliillia alive. From these I am able to give the 

 outward characteristics of the animal in drawings by Mr. Arthur F. Gray. 



The animals are larger and much lighter in color than those originally found 

 at Astoria. They do not while in motion differ from other slugs, though my 

 former figure of the animal in spirits shows a very great difference, owing to 

 the contraction being resisted by the internal shell. The rear end of the mantle 

 seems swollen and blunt, separated from the back, however, and thus alone 

 does there seem to me any difference in its appearance from Limax, whose 

 mantle lies fiat upon the back. The slit in the mantle is sometimes open, 

 sometimes closed, and the slit seems to extend quite to the rear of the mantle. 

 There is a profuse flow of mucus from over the slit. There seem on the man- 

 tle to be little protuberances, rather than the elongated reticulation of the 

 rest of the animal. The caudal pore opens and shuts, and exudes mucus in 

 bubbles sometimes, which occasionally form a solid lump of mucus on the tail. 

 The horn-like process of the tail so prominent in the first specimens from 

 Astoria — contracted in alcohol — does not exist in these living specimens, 

 though occasionally there is a kind of hump above the pore. (See Plate IV. 

 Fig. D.) 



Mr. Hemphill writes : " Hemphillia has a peculiar habit when removed from 

 its resting place of switching its tail, so to speak, cprite rapidly, — a habit I 

 never noticed in any of our other slugs. I find them hibernating in old 

 rotten logs." 



The viscera are enclosed under the mantle. 



Mr. Gray in drawing the animal called ray attention thus to the characters 

 of the outward markings of the slug : — 



