604 RET. E. BOOG WATSON ON THE 



is nicked at the point. Suture very slight, linear. Mouth 

 oblong, pointed and channelled above, and still more below, where 

 there is a rather broad, open, oblique canal. Outer lip scarcely 

 patulous, well arched, thin on the edge ; there is a slight varix 

 within, and 5 very insignificant tubercles for teeth. Inner lip 

 forms a continuous curve across the body and down the pillar, 

 which is obliquely cut off in front ; the labial callus is a little 

 thickened at the toj), and is narrow, with a well-defined edge ; 

 there are one or two feeble tubercles on it in front ; behind the 

 callus at the point is a very slight and superficial umbilical de- 

 pression. H. 0-46. B. 0-25. Penultimate whorl, height 0-09. 

 Mouth, height 0-26, breadth 0-11. 



This is an inconspicuous little shell, somewhat more angular and 

 conical than M. aciculatus, Lam. The spire is not unlike that 

 of M. Edwardsii, Payr. ; but the last whorl is much smaller than in 

 that species, and the whole sculpture is different and much more 

 delicate. It most of all resembles a species I found in Madeira, 

 but which is yet undescribed. 



7. MUBEX (OcnSTEBBA) PATJPEB, n. Sp. 



Oct. 6, ]874. Amboyna. 15 to 20 fms. 



Shell. — Strong, oblong, biconical, with a high, subscalar, fine- 

 pointed spire, and an elongated base produced into a short, flat, 

 slightly twisted, and reverted snout. Sculpture. Longitudinals — 

 there are rounded, tumid, nearly straight ribs, 9 on the last and in- 

 creasingly more on the earlier whorls ; they originate at the suture, 

 and extend to the snout ; their tumidity, which is most marked 

 at the periphery, angulates the whorls : the surface is scored by 

 fine lamellse, which run continuously and rise into vaulted scales ; 

 between these lamellse there are fine puckerings. Spirals — ^^there 

 are rounded threads parted by furrows of the same breadth as 

 the threads, but in which often a smaller thread occurs ; the 

 front of the snout has a strongish twisted cord scored with the 

 old canal-edge scars. Colour : the specimen is bleached. Spire 

 high, conical, subscalar. Apex small. Whorls 7 to 8 ; they are 

 conical and shouldered above, bluntly angulated and cylindrical 

 below. Suture a very slightly impressed line in the broad 

 rounded furrow of the whorls' meeting. Moitth oblong to sub- 

 rhomboidal, pointed and slightly channelled above ; the canal in 

 front is open and somewhat curved. Outer lip thickened by the 

 external varix, but bevelled off" to a narrow edge, with 7 longish 

 small teeth within ; not patulous ; it is flatly arched, and is at 



