CENTRAL PROVINCE SPECIES. 167 



Plate XI, Fig. A, of Terr. Moll., V, represents the genitalia of a Sal- 

 mon River specimen of the typical strigosa. The testicle, as usual, 

 was in the summit of the upper lobe of the liver. The epididymis is 

 long, convoluted in its half nearer the testicle. The accessory gland 

 is composed of several long, black cceca. The oviduct is sac-like, not« 

 convoluted, containing eight embryonic shells. The genital bladder is 

 small, with a long, narrow duct entering the upper part of the vagiua, 

 near which it is swollen. The vagina is short and swollen. The peuis 

 sac is long, stout, blunt at apex, where the retractor muscle is inserted. 

 The vas deferens becomes greatly swollen before it enters the sac of 

 tbe penis, which it does above the insertion of the retractor muscle. 



As the shells of some forms of this species are difficult to distinguish 

 from some forms of Patula soUtaria, it is interesting to state that the 

 genitalia of a specimen of the latter from the same locality offers very 

 distinct specific characteristics, agreeing with Dr. Leidy's figure in Vol. 

 I of Terr. Moll. 



E have received from Mr. Henry Hemphill specimens of H. Haydeni 

 with the animal, and so variable that I am convinced of its being a 

 variety of strigosa. The revolving lines are not always present, and 

 vary greatly in development. The young shells have erect coarse hairs 

 on the revolving lines. The discovery is an interesting fig. 155. 

 one, as the species was formerly considered extinct. One 

 of the original lot of specimens is here figured. Mr. Hemp- 

 hill found several curious varieties. The ydw of Raydeni 

 (Terr. Moll., V, Plate XVI, Fig. G), as well as its geni- 

 talia and viviparous habit, is the same as in strigosa. Its 

 lingual dentition I figure on Plate XVI, Fig. B. There 

 are 33-1-33 teeth. The eleventh tooth has the side cusp p. uaydeni. 

 and cutting point. 



Another curious form of this protean species was also found by Mr. 

 Hemphill in the same locality, a spur of the Wahsatch Range forming 

 the western boundary of the valley in which Salt Lake 



Fig. 156. 



City lies. This form is here figured. Its dentition is 

 given in Terr. Moll., V, Plate XVI, Fig. A. There are 

 27-1-27 teeth, the tenth having the side cusp and cutting 

 point. The jaw and genitalia are as in strigosa. Small 

 specimens of this curious form resemble P. Idahoensis, ' '"'^''" "*'*'"• 

 especially by its rib like striie of growth. The latter, however, as well 

 as F. HcDijjhiUi, has side cusps and cutting points to central and all. 

 the lateyal teeth of the lingual membrane.. - 



