244 

 2. Elusa} dtibia n. sp. PI. XVII, fig-. 9. 



Stat. 52. 9°3'.4S., 1 19° 56'./ E. Savu Sea. 959 M. Globigerine ooze. 5 Spec. 



Shell subulate, rather solid, yellowish-brown, shining-. Nuclear whorls eroded, subsequent 

 whorls about 8, separated by a conspicuous suture in a rather broad channel, caused by the 

 contraction of the whorls just below and still stronger above the suture; the whorls are nearly 

 flat, but slightly convex towards their base. Sculpture consisting of broad, flat ribs on the 

 upper whorls, becomiiig faint on the fourth whorl and nearly disappearing on the subsequent 

 ones, with the exception of a few occasional ribs; moreover the shell is covered with very fine 

 growth-striae and extremely fine spiral striae, only visible under a strong lens; last whorl with 

 an obtuse angle near the base and in some specimens a few stronger spiral striae below the 

 angle. Aperture ovate, angular above, rounded below, with a thin, nearly straight outer 

 margin, columellar margin regularly curved, slightly reflected, no umbilical slit; the margins are 

 connected by a moderately thick layer of enamel; interior of aperture smooth. 



Alt. 10, lat. 27^; apert. alt. 27^, lat. 17^ Mill. 



Alt. II, lat. 27^,; apert. alt. 27^, lat. 17^ Mill. 



A very puzzling species, externally resembling an Ehisa but without columellar plait. 

 I have sent two specimens to Mr. Melvill, who writes about it: "I incline to Elusa if not a 

 large abnormal Eulimella^ the longitudinal riblets of the apical whorls are like Elusa but there 

 is no columellar plait visible, the apex seems heterostrophe, the brown colour is like Elusa also". 

 As to the plait, I have opened three whorls of a specimen, but could not detect traces of a 

 plait. Should we consider the species as an abnormal Elusa, or as an abnormal Eidhnella, or as 

 a representative of a new group? In accordance with Mr. Melvill's predominant view, I have 

 followed the first method, without being quite certain, that it will prove to be the right manner. 



Eulimella Forbes. 

 I. Eulimella} sibogac n. sp. PL XVII, fig. 10. 



Stat. 52. 9° 3'.4 S., 1 19° 56'. 7 E. Savu Sea. 959 M. Globigerine ooze, i Spec. 



Shell rather large for the genus, subulate, smooth, yellowish-white. Nuclear whorls a 

 little eroded, subsequent whorls 773, slightly convex, separated by a distinct suture. Sculpture 

 consisting of fine and coarser growth-striae, which latter form however no distinct ribs, crossed 

 by very indistinct spiral striae, scarcely perceptible on many parts of the shell ; last whorl 

 elongately-rounded. Aperture (not quite intact) ovate, ang-ular above, outer margin thin, regularly 

 arched, base probably rounded, but subangular, (perhaps by the partly broken margin); columellar 

 margin straight, slightly reflected, nearly covering a trace of an umbilical slit. Interior of 

 aperture smooth. 



Alt. 10, lat. 37„; apert. ah. 27^, lat. 17^ Mill. 



This is also a very dubious species, it is nearly too bad for description, in so difficult 

 a group, but still in too good condition, to be neglected. So it may be located here, untill 

 further investigation will clear up its somewhat obscure position in the system. 



