MUSEUM OF COMPARATIVE ZOOLOGY. 189 



Tebennophorus Hemphilli, W. G. B. 



Plate VI. Fig. H. 



See Man. of Amer. Land Sh., p. 247. 



The animal is long, narrow, cylindrical, with pointed tail. Its color is 

 black. The jaw is strongly arched, with median projection, and four or five 

 ribs converging to the centre, all crowded on the middle third, the outer thirds 

 being ribless. The lingual membrane has 24-14-1-14-24 teeth, all of same 

 types as figured by Morse for that of T. dorsalis. Length of largest individ- 

 ual contracted in spirit 25 mm. 



The penis sac is long, cylindrical, receiving retractor muscle and vas deferens 

 at its summit. 



Patula solitaria, Say. 

 alternata, Say. 

 Cumberlandiana, Lea. 

 perspectiva, Say. 



Bryanti, Harper. 



See Suppl., p. 147. 



Helicodiscus fimbriatus, Wetherby. 



See Suppl., p. 148. 



A curious form, wanting the epidermal fringe and most of the revolving 

 ridges, was found in great numbers near Fort Gibson, Indian Territory, by Mr. 

 C. T. Simpson. The same form has been found by Mr. Hemphill on Salmon 

 Kiver, Idaho. He proposes for it the name Salmonacea. 



Strobila labyrinthica, Say. 



A form from Venezuela, without the costa), is noticed by Dall as var. Morsel 

 (U. S. Nat. Mus. Proc, 1855, p. 263). 



Polygyra leporina, Gould. 

 Hazardi, Bland. 

 Troostiana, Lea. 

 fastigans, Say. 

 Stenotrema spinosum, Lea. 

 labiosum, Gould. 

 Edgarianum, Lea. 

 Edvardsi, Bland. 

 barbigerum, Redfield. 

 stenotremum, Ferussac. 

 hirsutum, Say. 

 A widely separated locality is the bank of the Yaqui River, near Guaymas 

 (Palmer). 



Stenotrema maxillatum, Gould. 

 monodon, Rackett. 

 Triodopsis palliata, Say. 



