324 PROCEEDINGS OF THE ACADEMY OF _ [Nov.—Dec., 
Alt. 15, diam. 24 mm., umbilicus 4.5 mm. 
Type No. 109,184, from Station 76 (1913), Black River 2 miles 
above Fish Creek. It was taken also at Stations 53, 60-62, 64, 66, 
68, 69, 71, 72, 76-81, 83 of the expedition of 1913. 
On account of the form and sculpture of this large series, so unlike 
the usual forms of cooperi, it appears best to name it. The Blue 
River series varies from the apache type to the normal cooperi form. 
Indeed, specimens could be selected from the Mogollon series agree- 
ing with apache, though they are quite exceptional there. The 
genitalia are either practically typical cooperi, as at Station 76, or 
the costate part of the penis may be Bak a trifle longer, as at 
Station 81 (fig. 14c). 
Oreohelix strigosa meridionalis n. subsp. PI. VII, fig. 9. 
The shell is depressed and very openly umbilicate, the last whorl 
subangular above the aperture; otherwise resembling O. c. apache. 
Striation weak, subobsolete spiral lines only very faintly developed. 
Alt. 14.4, diam. 24.5 mm.; umbilicus 6 mm. wide; 54 whorls. 
Y Salt House branch of Eagle Creek, Graham Co., Arizona; type 
No. 109,186 A. N.S. P. Also taken on the Black River near the 
horseshoe bend. 
By the shells alone we would hardly separate this form from O. 
coopert apache; yet the genitalia were found to be like O. s. depressa. 
The genitalia (fig. 15) agree with those of O. s. depressa and various 
allied forms except that the organs are longer in shells of similar 
diameter; yet in Colorado depressa this is a rather variable character, 
and it is somewhat affected by the conditions of preservation. The 
penis is very long, its internally costate portion hardly one-third of 
the entire length, having about 4 principal ribs within; the internally 
‘papillose portion flattened, weakly ribbed within, sometimes having a 
trilobed section distally. Measurements of the organs in mm. follow: 
Pte 
cial GME] ae a 
Station on Epi- . Diameter . Museum 
(1913). Penis. on | phallus. | "Vagina. of shell. | Fig. oO. 
56 33 9 ero 9 24 15b 109,186 
See 31 10 | 8 10 Pra tutte! te 109,177 
Al! 19.5 6 | 5 6.5 2 tine 109,179 
B Gare at 28 iS a 6 8 21.5 | 15¢ 109,190 
| 
O. s. meridionalis differs from O. s. depressa by the distinctly 
smoother shell. 
y* tard 5 
A. 
een 
. , ——— 
ee ae ee eS ee eee 
