1917.] NATURAL SCIENCES OF PHILADELPHIA. 95 



of the penis is not swollen, and its cavity contains four or five sub- 

 equal longitudinal ridges. These structures have been found con- 

 stant in a great many specimens dissected, from Utah, Colorado, 

 Arizona and New Mexico.'- In 0. swopei the lower part of the penis 

 is conspicuously swollen, its cavity containing several large, irregular, 

 fleshy processes (fig. 36), below which there are many small longitu- 

 dinal cords (fig. 3). 

 The organs measure: 



Length of penis 22 mm. 



" swollen portion of penis 8.5 " 



" of epiphallus 4.5 



" of penial retractor 7 



" of vagina 6.5 



" of spermatheca and duct 21 



Diameter of shell 21 



0. concentrata differs by its far shorter penis. 



In the specimen dissected, taken about September 15, there were 

 eight embryos (PI. IX, fig. 13), the largest 4.2 mm. diameter. 

 The base shows many smooth spiral lines and bands cutting through 

 densely crowded, crinkled radial striae. When these are worn oE it 

 appears almost smooth, the apparently strong spiral sculpture 

 shown in the figures being cuticular. 



Afew beautiful albino shells were found in one rock pile in Station 45. 

 Oreohelix metcalfei Ckll. PI. VIII, fig. 5. 



Oreohelix slrigosa metcalfei Ckll., Nautilus, XVIII, 190.5. p. 113. Pilsbrj^ 

 Proc. A. N. S. Phila., "190.5, p. 27S, PI. 25, figs. 44, 48, 52. 



This species was described from shells collected by Mr. O. B. 

 Metcalfe "near Kingston," the exact spot not designated. We 

 hunted one day around Kingston, but did not find it. The country 

 near the town is rather discouraging — steep stony hills with prac^ 

 tically no shade, though there is abundant limestone. Probably 

 we did not go far enough afield. We suspect that the colony was 

 either nearer the mountains or northward, probably not in the 

 immediate vicinity of the town. 



Three very old "bones" were found by one of us in Sam's Canyon, 

 Station 53, some miles south of Chloride. These occurred with 

 Holospira, like the original lot. 



It appears that the 0. metcalfei group, in Grant, Sierra and Socorro 

 Counties, comprises a series of forms largely parallel to the 0. haydeni 

 series in Utah and Colorado, but even more remarkable in its extremes 

 of form and sculpture. 



2 See these Proceedings for 1905, p. 272. PL 19, fig. 3; 1916, p. 345, PI. 19, 

 figs. 1-4, 6, 7; PI. 20, fig. 8. 



