MOLLUSCA OF THE * CHALLENttEE ' EXPEDITION. 117 



metrical ; the sculpture is less oblique ; tlie mouth is unmistakably 

 different, being smaller, more drawn in towards the axis of the 

 shell, and the inner lip has no curve on the body and no angula- 

 tion at the junction of body and pillar, but runs quite straight 

 from the angle of the mouth to the point of the pillar. Than 

 either E. hilineata, Alder, or E. gracilis, Forb., the mouth is much 

 smaller, the shell is much more attenuated and drawn out on the 

 base. 



7. EuLiMA oxTTATA, n. sp. (olvTaros, excessively sharp.) 

 St. 212. Jan. 30, 1875. Lat. 6° 55' N., long. 122" 15' E. Off 

 Malanipa, Basilan Strait, Philippines. 10-20 fms. Sand. 



Shell. — High and narrow, slightly bent, very thin and trans- 

 parent, with a very fine linear suture fallaciously marginated 

 and little oblique, fiat-sided whorls, a very round base, a short 

 round mouth, and an excessively sharp point. Sculpture none 

 but occasional microscopic lines of growth. Colour horny trans- 

 lucent to transparent white. Apea? excessively small, attenuated 

 and sharp, acuminately rounded and almost symmetrical. Spire 

 very high and narrow, not quite straight, there being more or 

 less of a bend near the tip. Whorls 17, very short, perfectly 

 fiat-sided; the last is short, very slightly tumid, with a very 

 gently and regularly curving base. Suture very little oblique, 

 linear, scarcely visible on the surface, and having the appear- 

 ance of being remotely marginated in consequence of the septum 

 of the whorls shining through the thin shell. Mouth pear-shaped 

 in the young shell ; it is somewhat irregularly semicircular in 

 the adult form. Outer lip very regularly arched except toward 

 the lower outer corner, where there is a blunt angulation ; the 

 edge is shallowly and broadly sinuated above, prominent in the 

 middle, and then it retreats to the shallow, open, unequal-sided 

 gutter in front. Inner lip very fiat on the body ; there is a 

 very slight angulation at the junction of body and pillar, which 

 last is oblique, very short and very narrow, with a patulous but not 

 reverted edge. H. 0'3. B. 0'07. Penultimate whorl, height 0"04. 

 Tip of apex O^OOl to 0-002. Mouth, height 0-05, breadth 0-04. 



This very beautiful form is especially remarkable for the ex- 

 treme sharpness of its apex, which is not so much as half the 

 breadth of E. distorta, Phil. It is slightly like E. attenuata, Sow., 

 but is much slimmer, thinner in texture, more brilliant, and has a 

 shorter and rounder mouth. Than E. acicula, G-d., it is very much 



