Tee N Serius. 
Vou XL OCTOBER, 1897. No. 6. 
NEW LAND SHELLS FROM MEXICO AND NEW MEXICO. 
BY W. Hapa. 
Holospira (Haplostemma) Cockerelli n. sp. 
Shell small, pupiform, blunt-tipped, with two smooth nuclear and 
about a dozen subsequent whorls; those following the nucleus are 
rather strongly obliquely ribbed with close set fine riblets which be- 
come fainter over the main body of the spire and reappear again on 
the last whorl ; aperture entire, simple, rounded, but a little angular 
at the posterior outer corner ; the umbilicus closed, the spire grad- 
ually enlarging to the eleventh whorl, then slightly attenuated. Alt. 
12°5, max. diam. 3°2 mm. 
Found in the débris of the Rio Grande at Mesilla, New Mexico, 
by Prof. Cockerell. 
This is the second species of Haplostemma, and one of the small- 
est, if not the smallest, Holospira yet recorded. It forms an addi- 
tion to the fauna of the United States. 
Eucalodium hippocastaneum n. sp. 
Shell of moderate size, with 8 (decollate) whorls, the penultimate 
the largest, thence gently tapering to the decollate apex ; surface 
very dark chestnut brown covered with fine, slightly wavy, close 
set riblets accompanied by fine axial wrinkles near the sutures, a 
few irregular spiral threads occasionally appear, suture distinct, 
umbilicus closed, a faint keel below the periphery of the last whorl, 
aperture simple, rounded, the peristome slightly thickened, not re- 
flected. Alt. 32, max. diam. 9°2, aperture 8 mm. 
