1917, 



NATURAL SCIENCES OF PHILADELPHIA. 



223 



shell. The whorls are almost flat. The outer lip is rather strongly 

 and evenly arched forward. 



Length 5.8, diam. 1.9, lenglh of aperture 1.6 mm.; about 12 whorls. 



Length 5.5, diam. 1.8 mm. 



This species is a true Melanella conchologically, though some 

 examples are nearly straight in front view. It certainly differs from 

 M. acicula (Gld.) {Stylifer acicula Gld.), of which specimens of the 

 original lot from Gould have been compared. The very much 

 narrower sutural margin, the straighter form and more transparent 

 shell of M. acicula are characteristic. Eulima exilis Pease^ is a 



Fig. 11. — a, b, Melanella aciculata, Pease coll. c, M. aciculata, Hilo. d, M. 



kahoolawensis. e, f, M. vafra. 



' Eulima exilis Pease, P. Z. S., 1862, p. 242; Amer. Journ. of Conch. Ill, p. 294, 

 PI. 24, fig. 25. It has been united by Tryon with E. pusilla Sowerby, from 

 Sta. Elena, Bay of Guayaquil, Ecuador, but in my opinion erroneously; Sowerby 's 

 figure, Conch. Illustr. fig. 6, is very different. It is not Eulima exilis Gabb, 

 Journ. Acad. Nat. Set. Phila. IV, p. 385 (November, 1860). As the original 

 description of E. exilis Pease was inadequate, the published figure poor, and the 

 name preoccupied, the species may be redescribed as follows: 



Eulima pisorum. (Figs. I2a, 6.) 



The shell is almost straight, bluish white, opaque white at the last third of the 

 last whorl. Suture linear, inconspicuous, having a narrow clear margin, rather 

 sharply defined, more opaque below the margin. Whorls hardly perceptibly 

 convex. There is a rather inconspicuous variceal line preceded by an opaque 

 area on the back of the antepenult whorl, another on the second whorl above it. 



