PACIFIC COAST SPECIES. 



135 



A. reticulata, slohose . 



Genitalia of ramenfosa as in var. NickUnicma. It is fiq. m. 



figured in Proc. Acad. :N'at. Sci., 1874, Plate III, Fig. H. 

 Tlie ovary is brownish below, yellowish above. The 

 epididymis and testicle are salmon-colored. The ovi- 

 duct is white, the prostate salmon. The genital bladder 

 is small, oval, with an extremely long duct, which has a 

 flagellate branch. The duct enters at the lower end of 

 the vagina. The penis sac is narrow, cylindrical, ex- 

 tremely long, with a flagellate extension. The retrac- 

 . tor muscle is inserted beyond the middle of the length 

 of the penis sac, the vas deferens at the commencement 

 of the flagellum. There is a stout, long, cylindrical 

 vaginal prostate, whose apex is extended into a flagellum, which 

 shortly becomes bifurcate, there being a bnlblike expansion on each 

 branch just beyond the bifurcation. In some individuals the bulb-like 

 expansions are still larger and stouter than in the figure. The cylin- 

 drical extension of the vaginal ijrostate is abruptly truncated, the two 

 flagella entering near the end, not at the extreme terminus. 



Var. Diabloensis, J. G. Cooper. 



Shell depressed-globose, nmbilicated, thin, roughened with incre- 

 mental wrinkles, and with regular malleatious arranged in pin. 112. 

 revolving series ; reddish horn-color, the last whorl with ^.-es^^St:^ 

 'a white-margined revolving band of red; spire but little C ^^A 



elevated, aj)ex obtuse ; whorls 6, convex, the last not ^~^v_y 

 descending, globose; ajierture oblique, banded within; a. Diabioe.nit;,. 

 peristome thickened, white, the columellar extremity reflected, par- 

 tially covering the umbilicus. Greater diameter 22, lesser IT'"'"; 

 height, O-""'. 



Helix Diabloensis, J. G. Cooper, Am. Jouru. Conch., iv, 221, no descr. ; Cal. Proc, iii, 



260, descr., without name. 

 Lysiiwe Diabloensis, J. G. Cooper, Proc. Acad. Nat. Sci. Phihi., 1872, p. 150, pi. iii, 



tigs. G, 1-4. 

 Ariotita Diabloensis, W. G. Binney, Terr. Moll., v, 368. 



Californiau Region, Mount Diablo, near San Francisco ; also in 

 Colusa and Napa Counties. A species of the Coast Range. 



Jaw as usual ; 5 ribs. 



Lingual membrane (Terr. Moll., V, Plate IX, Fig. T) as usual in the 

 genus. The central and first lateral teeth have no side cusps or cut- 

 ting points; these appear on the thirteenth. The eighteenth tooth has 



