NO. 2207. WEST AMERICAN MELANELLID MOLLUSKS—BARTSCH. 311 



upper half approssed to the base; parietal wall covered with a thin 

 callus. 



Three specimens of this species were dredged by the United States 

 Bureau of Fisheries steamer Albatross at station No. 2823 in 26^ 

 fathoms on broken shell bottom, bottom temperature 73°, off La 

 Paz, Lower CaUfornia. Two of these we have described and figured. 

 The smaller of those two is a young individual of 10 whorls and 

 measures — length, 1.7 mm.; diameter, 0.5 mm. The adult has eight 

 whorls, having lost the early turns, and measures — length, 2.6 mm.; 

 diamater, 0.8 mm. 



Carpenter's type, which is in the British Museum, Liverpool col- 

 lection, Tablet 2025, is a young specimen, having nine whorls, which 

 measure — length, 1.8 mm.; diameter, 0.55 mm. 



The following additional specimens, aU dredged by the United 

 States Bureau of Fisheries steamer Albatross, in the Gulf of Califor- 

 nia, have been examined. 1, specimen (Cat. No. 191567, U.S.N.M.), 

 at stations 2826 to 2828, near La Paz, in 9^ to 10 fathoms, on shell 

 bottom; 1 (Cat. No. 251300, U.S.N.M.), off Corralvo Island, station 

 2822, in 21 fathoms, on gray sand and broken shell bottom, bottom 

 temperature 73°. 



MELANELLA (MELANELLA) PANAMENSIS. new species. 



Plate 36, fig. 1. 



Shell small, elongate-conic, yeUowish-white, polished, marked by 

 exceedingly fine lines of growth only. The first three whorls well 

 rounded, separated by a weU-impressed suture, succeeding turns flat- 

 tened, with poorly defined suture. Periphery of the last whorl decid- 

 edly angulated. Base short, well rounded. Aperture small, broadly 

 oval; posterior angle acute; outer lip angulated at the junction with 

 the basal lip; inner lip very oblique, stout, slightly curved, reflected 

 over and appressed to the base posteriorly; parietal wall covered with 

 a thick caUus. 



The typo (Cat. No. 251312, U.S.N.M.) was dredged by the United 

 States Bureau of Fisheries steamer Albatross at station 2794, in the 

 Bay of Panama, in 62 fathoms on gray sand and broken shell bottom, 

 bottom temperature 59.6°. It has lost the first whorl; the nine re- 

 mainmg measure — length, 2.8 mm.; diameter, 1 mm. 



MELANELLA (MELANELLA) RECTA C. B. Adams. 



Plate 39, fig. 3. 

 Eulima recta C. B. Adams, Ann. Lye. Nat. Hist. New York, vol. 5, 1852, p. 423. 



Shell acicular, bluish-white. Early whorls slightly rounded, the 

 later ones decidedly flattened, appressed at the summit, marked by 

 exceedingly fine fines of growth only. Suture scarcely indicated. 

 Periphery of the last whorl well rounded. Base produced, well 



