298 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 37. 



Twenty-five of the remaining specimens, taken at random, measure: 



Named for Dr. Pavil C. Freer, Director of the PhiHppine Bureau 

 of Science. 



COPTOCHEILUS McGREGORI, new species. 

 Plate 29, %. 15. 



Shell pupiform, translucent, chocolate brown. Nuclear whorls 

 two and one-half, dextral, smooth, coiled like the rest of the shell, 

 but much lighter in color. Post-nuclear whorls strongly rounded 

 and appressed at the summits, separated by decidedly constricted 

 sutures, crossed by fine, retractive, incremental lines, which are 

 strongest near the summit; the first three and one-half or four 

 whorls are marked also by fine lightly impressed spiral striations. 

 Periphery of^he last whorl faintly angulated. Base well rounded, 

 narrowly umbilicated. Aperture subcircular, expanded and re- 

 flected to form a thick, continuous peritreme, the parietal side of 

 which is attached to the body wall. Peritreme double color, the 

 inner separated from the outer by a strong deeply incised line, the 

 notch in the inner being a little deeper than in the outer columellar 

 wall. Operculum thin, horny multispiral. 



Thirty-one specimens were collected by Mr. R. C. McGregor, of the 

 Philippine bureau of science, on Semerara Island. The type (Cat. 

 No. 205181, U.S.N.M.) has 8 whorls, and measures— length 20.5 

 mm., diameter 7.5 mm.; length of aperture 6.8 mm.; diameter of 

 aperture 6.6 mm. 



