NO. 2207. WEST AMERICAN MELANELLID M0LLU8KS—BARTSCH. 323 



The type (Cat. No. 215767, U.S.N.M.) was collected by Mr. Hemp- 

 hill at Point Abreojos, Lower California. It has eight whorls and 

 measures — length, 1.8 mm.; diameter, 0.7 mm. Another specimen 

 from the same locality is in Mr. Kelsey's collection, while a third, in 

 Mrs. Oldroyd's collection, comes also from the same place. 



MELANELLA (BALCIS) TOWNSENDI, new species. 



Plate 40, fig. 1. 



Shell small, straight, excepting the tip, which is flexed in one direc- 

 tion, semi translucent, bluish-white. The first tliree whorls well 

 rounded, separated by a well-impressed suture. The rest almost 

 flat, with inconspicuous suture. Periphery of the last whorl rounded. 

 Base rather protracted, somewhat flat on the left side, slightly tumid 

 anteriorly. Aperture broadly oval; posterior angle acute; outer lip 

 thick at the edge, decidedly protracted in the middle; inner hp shorty 

 curved, reflected over and appressed to the base; parietal wall cov- 

 ered by a moderately thick callus. 



The type and another specimen (Cat. No. 267812a, U.S.N.M.) were 

 collected by the author in shallow water at Pichilinque Bay, Gulf of 

 CaUfornia. The type has 13 whorls and measures — length, 3.8 mm.; 

 diameter, 1.1 mm. 



MELANELLA (BALCIS) THERSITES Carpenter. 



Plate 41, figs. 1, 2, 3. 



Eulima thersites Carpenter, Rept. Brit. Ass. Adv. Sci. (1863) 1864, p. 659; Ann. 



Mag. Nat. Hist., ser. 3, vol. 15, 1865, pp. 396-7. 

 EulivialoweiYANATFA, Proc. Acad. Nat. Sci. Phila., 1899, p. 254, pi. 11, figs. 9, 10. 

 Eulima bistorta Y as atta, Proc. Acad. Nat. Sci. Phila., 1899, pp. 254-5, pi. 11, 



figs. 7, 8. 



Shell broadly conic, rather stout and heavy, polished, shining, 

 usually flexed in one direction onh', though sometimes in two. 

 Whorls rather strongly rounded, marked by exceedingly fine incre- 

 mental lines and irregularly scattered varices only. Sutiu-es strongly 

 marked. Periphery of the last whorl somewhat inflated, well rounded. 

 Base short, well rounded. Aperture oval; posterior angle acute: 

 outer lip thick \nthin, sharp at the edge, and decidedly protracted a 

 little anterior to the middle; inner lip stout, slightly curved, the 

 posterior half reflected over and appressed to the base. Parietal wall 

 covered by a very thick callus which renders the peritreme complete. 



Carpenter's type (Cat. No. 11795 U.S.N.M.) comes from Santa 

 Barbara, Cahfornia. It has lost the early whorls. The six and a 

 half remaining measure — length, 5.1 mm.; diameter, 2.5 mm. An 

 absolutely perfect specimen of 12 whorls measures — length, 6.3 mm.; 

 diameter, 2.3 mm. 



In addition to the figure of the type, we are also giving figures of 

 Doctor Vanatta's two species, Melanella hisforfa, andMelandla hnvei. 



