MOLLTJSCA OP THE ' CHALLENaEE ' EXPEDITION. 359 



duced into a small, short, oblique canal below. Outer lip 

 tbin, blunt, rather patulous, slightly sinuated and angulated 

 a little way below the suture, and below this flatly arched. 

 Inner lip : a very thin and narrow glaze covers the arched body 

 and the straight pillar, which is not thickened or twisted, but is 

 obliquely cut off" in front. Operculum is intermediate in form 

 between that of Buccinum and Cominella ; for, as in the latter, the 

 nucleus is at the lower end, but it is not apical but is within the 

 edge towards the outer margin as in the former. H. 0*4'. B. 0'18. 

 Penultimate whorl, height O'l. Mouth, height 0"19, breadth 

 0-11. 



2. Buccinum (?) aquilakum, n. sp. 



St. 78. July 10, 1873. Lat. 39° 26' N., long. 25° 13' W. Off 

 San Miguel, Azores. 1000 fms. Glohigerina-ooze. 



Shell. — Small, thin, white, ventricose, bicouical, oval, subscalar, 

 with an oval, slightly oblique mouth, and a short canal. Sculp- 

 ture. Longitudinals — on the upper whorls there are many feeble, 

 close-set, straight riblets, which are very faint and merge into 

 the lines of growth on the last whorl. Spirals — on the whole sur- 

 face are fine, rounded, spiral threadlets parted by shallow furrows 

 which are broader than the ribs. Colour semitransparent white, 

 under a thin yellow membranaceous epidermis. Spire short, broad, 

 conical, subscalar. Apex small, but rounded. Whorls 6, slightly 

 flattened above ; below this there is a very blunt angulation, and 

 the lower part of each whorl is subcylindrical ; the last whorl is 

 ventricose, contracting on the base to a very short, rather lop-sided 

 snout. Suture impressed. Mouth rather large, oval, rounded at 

 the top, and prolonged below into an oblique, short, open canal. 

 Outer lip thin, but not sharp, very bluntly angulated near the 

 top, of regular curve, open, with a very slight basal cut at the 

 point of the pillar. Inner lip : a thick layer of glaze, with a pro- 

 minent edge continuous with the outer lip, runs down parallel to 

 the belly-margin, and is cut off by the oblique canal at the point of 

 the pillar, which is neither swoln nor thickened. H. 0'33. B. 

 0-21. Penultimate whorl, height 0-07. Mouth, height 0-22, 

 breadth 013. 



This is a perplexing form, in general aspect very like several 

 Admetce. Than A. ovata, E. Sm., from Japan, it is very much 

 higher and more attenuated in the spire ; than A. crispa, Moller, 

 it is much more tumid, and lower iu the spire ; than A. viridula, 



