MOLLUSCA OF THE ' CHA.LLEN&EB ' EXPEDITION". 377 



thin, well rounded, straight and patulous along the canal. Inner 

 lip concave, with a very short direct pillar, which is obliquely cat 

 ofl' and twisted in front ; a very thin narrow glaze lies on body 

 and pillar. H. ll. B. 0-6, Penultimate whorl, height 0-22. 

 Mouth, height 0-44, breadth 0-33. 



It is very possible this and the preceding may be the same 

 species, and may be ultimately united to Buccinopsis canaliculata, 

 Dall ; but the diflerences in form and in epidermis make their 

 separation inevitable till a fuller series of specimens perhaps supply 

 links of connection. 



6. FUSFS (SiPHO) SCALAKIS, U. sp. 



St. 305 A. Jan. 1, 1876. Lat. 47° 48' 30" S., long. 70° 47' 

 W. N.W. Patagonia. 125 fms. Mud. 



Shell. — Small, thin, porcellaneous white, with feeble longitu- 

 dinals and faint spirals, a high, conical, scalar spire, small mamil- 

 lary apex, a short, rounded, contracted base, and a small, lop-sided> 

 slightly reverted, emarginate snout. Sculpture. Longitudinals — 

 there are about 15 rounded, slightly tumid ribs, which originate 

 below the upper suture, and hardly reach the lower, and on the 

 base die out ; they are parted by broad, rounded, shallow furrows ; 

 the surface is all scored with sharp unequal lines of growth. 

 Spirals — near the top of the whorls is a blunt angulation ; above 

 this obsoletely, and below it not very strongly, the surface is 

 scored by broad, flatly rounded threads parted by narrow, very 

 slightly depressed furrows ; these threads and furrows do not 

 appear on the snout. Colour porcellaneous white. Spire high, 

 conical and scalar. Apex small, mamillate, with a very small, 

 slightly depressed tip ; it consists of about two smooth, rounded 

 embryonic whorls. Whorls 7, with a high, slightly declining, and 

 rounded shoulder, defined by a blunt angulation, below which the 

 whorls are somewhat cylindrically conical, contracting slightly into 

 the lower whorl. Sutiire impressed, but rounded and open, the 

 lower whorl lapping up on the upper, and the true suture being 

 linear. Mouth oval, bluntly pointed above, and produced below into 

 the short, open, oblique canal. Outer lip a little receding above on 

 the shoulder, bluntly angulated at the keel, below which point it 

 is arched, with a very slight constriction at the short, open, and 

 slightly reverted snout. Inner lip very slightly concave above, 

 straight on the short pillar, and oblique along the canal, where 

 there is a twist on the point of the pillar ; it is bordered by a nar- 

 row thin glaze, which runs out almost to the extreme point of 



