PATULA. 157 



sent several peculiar features. The penis sac (5) is short, stout, receiving near 

 its apex the retractor muscle (G), above which it rapidly decreases in size, and 

 at its apex receives the vas deferens (2); the last-named organ is very peculiar 

 in being greatly convoluted before entering the penis sac ; the genital bladder 

 (9) is small, globular, on a long duct, which becomes swollen at its lower end ; 

 the epididymis (2) is convoluted in its entire course. 



Patula strigosa, Gould. 

 Vol. III. PL XXVI. a. 



Shell broadly umbilicated, orbicular, slightly and about equally convex 

 above and beneath, surface irregular, and roughened above by indentations 

 and coarse lines of/ growth, and by occasional fine revolving lines ; smoother 

 and shining beneath ; color ashy-gray, somewhat mottled with dusky or alto- 

 gether rusty brown above, with, usually, a single, faint, revolving band on the 

 middle of each whorl, and often with numerous bands, unequal in size and dis- 

 tance, beneath ; whorls 5, moderately convex, the last one carinated at its 

 commencement, and defiexed ; aperture very oblique, circular ; peristome sim- 

 ple, acute, almost continuous, terminations approaching, joined by thick callus, 

 that of the columella subreflected. Greater diameter 21, lesser 18 mill.; height, 

 10 mill. 



Helix strigosa, Gould, Proc. Bost. Soc. Nat. Hist., II. 166 (1846); Expl. Exped. 



Moll. 36, Fig. 41 (1S52) ; Terr. Moll., II. 210, PL XXVI. a. — Pfeifff.r, 



Mon. He!. Viv., I. 121 ; IV. 91 ; Mai. Bl. 1857, 321. — W. G. Binney, Terr. 



Moll., IV. 23 ; L. & Fr.-W. Sh., I. 72 (1S69). 

 Avguispira strigosa, Tkyon, Am. Jouni. Conch., II. 261 (1866). 

 Helix Cooperi, W. G. BlKNEY, Proc. Acad. Nat. Sci. Thila. 1858, 118 ; Terr. 



Moll., IV. 97, PI. LXXVII. Fig. 11; L. k Fr.-W. Sh., I. 78, Figs. 132-137 



(1869). — Pfeifff.r, Mai. Blatt. 1859, 6. 

 Anguispira Cooperi, Tkyox, Am. Journ. Conch., II. 260 (1866). 

 Helix Hay deni, Gabb, Am. Journ. Conch., V. 24, PI. VIII. Fig. 1 (1869). 



This species seems to inhabit all of the Central Province from New Mexico 

 on the Rio Piedro to the British Possessions. It is also found in the moun- 

 tainous country east of the Rocky Mountains in the Eastern Province, at least 

 as far east as long. 108°. It has also penetrated the Pacific Province, bavins 

 been found in Eastern Oregon. 



The species is viviparous. Seventeen embryonic shells were found in one 

 individual, of which the largest had three whorls. 



A large specimen in my cabinet has a larger diameter -of 26 mill. 



It will be seen from the above synonymy that I have become convinced of 

 the identity of strigosa and Cooperi. PI. XXVI. a, of Vol. III. represents the 

 former, while the following figures give various forms of the latter. I repeat 

 the description of the typical Cooperi: — 



