342 PROCEEDINGS OF THE NATIONAL MUSEUM. ^ou 56. 



forate; suture deep; axial sculpture of very faint incremental lines 

 and 1 1 thin, low, narrow, continuous varices, dipping into the suture 

 which encircle less than a quarter of the circumference of the spire; 

 surface polished, aperture obliquely ovate; height of shell, 9; of last 

 whorl, 5; diameter, 4 mm. U. S. Nat. Mus. Cat. No. 218096. 



Type-locality. — Beach at Magdalena Bay, Lower California; col- 

 lected by C. R. Orcutt. 



GUAPHIS SHEPAUDIANA, new species. 



Shell mmute, slender, translucent yellowish, with about nine whorls, 

 including the rather blunt smooth apical nucleus; suture constricted, 

 distinct, coils of the spire rather lax; axial sculpture of minute, 

 close-set plications which start from the suture and become feeble 

 on the base; these are crossed by minute close spiral striae most 

 evident near the periphery, and under the lens showing an incon- 

 spicuous reticulation; base imperforate, romided, and somewhat 

 produced; aperture ovate, the margin thin, not reflected, interiaipted 

 by the body, produced anteriorly; height of shell, 3.7; diameter, 

 1mm. U. S. Nat. Mus. Cat. No. 107276. 



Type-locality. — San Pedro, California; collected by Miss Ida Shep- 

 ard, nov/ Mrs. Oldroyd. 



This shell was collected and named in 1895, but by some accident 

 the diagnosis has remained unpubhshed. It may have been dis- 

 tributed under the generic name of Siylopsis. 



CARINARIA LATJDENS, new species. 



Animal slender and mostly translucent yellowish ; the extreme tail 

 for a short distance, the muzzle, and the hver contained chiefly in 

 the shell, are dark purple; the crop or anterior food cavity is pink- 

 ish; the eyes very vivid black, contained in short subcyhndric proc- 

 esses behind and a little outside of the short slender tentacles. The 

 surface of the body is covered with small translucent acute pustules. 

 The giUs are small and protrude from the shell. The ventral fln is 

 romided quadrate, about one-third of the way from the muzzle to 

 the tail. The shell and its included organs are about midway of the 

 total length. The ventral sucker is small on the ventral and near 

 the posterior edge of the fin. The dorsal fin halfway between the 

 shell and the tail is lower, rounded triangular, diminishing in height 

 backwards. The shell is small, with a minutely coiled apex, and 

 the weight of the included organs causes the animal to swim perma- 

 nently on its back. The radula is of the general type of that of 

 C. cristata, but the rhachidian tooth is more than twice as wide 

 proportionately and develops a smaU cusp at each anterior corner 

 of the base — a feature not known in C. cristaia. There are three 

 slender laterals. Behind the eyes the body is gradually constricted 



