524 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 54. 



Here, too, they are quite regularly distributed, but a little more 

 densely spaced immediately behind the aperture than on the rest 

 of the shell. Aperture large ; outer lip very slightly reflected ; inner 

 lip expanded at the base and slightly reflected over the umbilicus; 

 parietal wall covered by a thin callus. 



The type (Cat. No. 216906, U.S.N.M.) has six whorls and meas- 

 ures — altitude, 15.9 mm.; greater diameter, 26.7 mm.; lesser di- 

 ameter, 21.2 mm. It comes from Palomar Mountain, which Mr. 

 Lowe informs me is sometimes called Smith Mountain. He states 

 further that this is a detached mountain midway between the San 

 Jacintos on the north and the Cuyamacas on the south. He says 

 that it is about 5,700 feet at the highest peak, and that the shell was 

 obtained at an altitude of 5,000 feet. 



EPIPHRAGMOPHORA TRASKII ISroROENSIS, new subspecies. 

 Plate 83, figs. 4, 5, 6. 



Shell depressed, helicoid, horn-colored, with a broad chestnut band 

 at the periphery, that is edged on either side by a somewhat lighter 

 zone than the general tint of the shell, which is almost as wide as 

 the brown band. Nuclear whorls one and three-quarters, moderately 

 rounded, densely covered with small papillae, which gives the entire 

 surface a granulose appearance. The succeeding whorls are marked 

 by decidedly, obliquely curved, retractive lines of growth and rows 

 of well rounded, small papillae which form lines practically at right 

 angles to the lines of growth. In addition to this sculpture the last 

 two whorls are marked by rather distantly spaced, somewhat inter- 

 rupted, feebly incised spiral lines. Base well rounded, with a moder- 

 ately broad umbilicus, which is almost half covered by the reflected 

 inner lip, marked by strong incremental lines and the weakly incised 

 spiral striations which equal those on the upper surface. The 

 general papillation is absent on the lower surface excepting im- 

 mediately behind the aperture where there is a dense massing of 

 very fine granules, which is also the case on the upper surface. 

 Aperture large, subcircular; outer lip very slightly reflected; inner 

 lip broadly expanded at the base and reflected to half cover the 

 umbilicus. 



The type and another specimen were collected by Mr. H. N. Lowe 

 on Campo San Isidro Mountain on the Mexican border. The type 

 (Cat. No. 216907, U.S.N.M.) has 5.5 whorls and measures— altitude, 

 13.5 mm. ; greater diameter, 21.3 mm. ; lesser diameter, 17.6 mm. The 

 other specimen, which is in Mr. Lowe's collection, is not quite mature. 



EXPLANATION OF PLATE 83. 



Figs. 1, 2, and 3. EpiphragmopJiora cuyamaccnsis lotoei. 

 4, 5, and 6. EpiphragmopJiora traslcii isidroensis. 



