52 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 56. 



Bange.— Station 3392, Gulf of Panama, U. S. Bureau of Fisheries 

 steamer Albatross in 1,270 fathoms, bottom temperature 36.4° F. 



GLYPHOSTOMA THALASSOMA Dall. 



Plate 17, fig. 2. 



Ghjphostoma thalassoma Dall, Bull. Mas. Comp. Zool., vol. 43, No. 6, p. 

 290, Oct. 1908. 



Ra/ngc. — Station 3017, Gulf of California, off Cape Lobos, in 58 

 fathoms, mud, bottom temperature 61.8° F. Cat. No. 110612, 

 U.S.N.M. The specimen selected for figuring is from 76 fathoms 

 Cat. No. 223154, U.S-N.M. 



GLYPHOSTOMA ADANA, r.ew species. 



Plate 17, fig. 1. 



Shell sm.all, slender, acute, whitish with the aperture more or less 

 tinged with brown; nucleus white, glassy, with a minute globular 

 apex and four subsequent whorls changing abruptly into the sculn- 

 ture of the six subsequent whorls; the first of the latter has a pe- 

 ripheral keel changing on the next whorl to two and on the later 

 whorls to three equidistant prominent cords with a smaller one be- 

 hind and another in front of and close to the suture; on the last whorl 

 the latter is obsolete and on the base there are 9 or 10 cords with 

 interspaces widening toward the periphery, of which cords the more 

 prominent are minutely nodulous or swollen when they cross the 

 axial riblets; there is a wide concave anal fascicle in front of the 

 suture with arcuate striation; the whorl at the suture somewhat ap- 

 pressed; axial sculpture is composed of about a dozen rather feeble 

 ribs extending from the anal fasciole forward to the suture, but 

 which are nearly obsolete on the second half of the last whorl ; aper- 

 ture rather narrow, the outer lip varicose, minutely denticulate 

 within and with a sharp edge, the anal sulcus deep and rounded with 

 a nodular callus on the body; inner lip with six or more denticula- 

 tions; canal short, deep, and strongly recurved. Height of shell, 10; 

 of last whorl, 5 ; diameter, 3.7 mm. Cat. No. 267597, U.S.N.M. 



Range.— R&2idi of Concepcion Bay, Lower California, Dr. Paul 

 Bartsch. 



This species resembles G. adna, but is lighter colored, smaller, and 

 proportionately more slender. 



GLYPHOSTOMA ADRIA, new Bpecies. 



Plate 17, fig. 5. 

 Shell small, slender, acute, pale brownish, or with still paler nebu- 

 losity ; with three darker brown nuclear whorls, the first minute, the 

 others regularly increasing with a deep suture; subsequent whorls 

 seven, the first peripherally keeled, the periphery rather anterior; 



