M0ILTJ90A OF THE ' CHALLENGER ' EXPEDITION. 337 



ridges which, iu crossing the ribs, rise into narrow blunt prickles, 

 which are vaulted but scarcely open in front ; of these ridges 

 there is one on the upper whorls, three on the body-whorl, each 

 accompanied below by its shadow, which is sometimes double ; 

 of these the highest and strongest is remote from the suture, and 

 forms a marked shoulder ; on the snout are two strougish threads, 

 and towards its point four or live much smaller ones. The whole 

 surface is covered with feeble microscopic strise. Colour a rich 

 buff below a darker epidermis, which is strong, horny, and per- 

 sistent. Spire high, scalar, conical. Apex small and prominent. 

 Wlwrls 9 to 10, angular, with a long, sloping, slightly concave 

 shoulder defined by the prominent and sharp keel, below which 

 the whorls contract a little to the inferior suture ; the body- 

 whorl is short, and contracts into a long, conical, straight, narrow 

 snout. Suture slight, irregular, imp)ressed, oblique. Mouth 

 bluish white, with a narrow dirty yellowish edge ; small, deep, 

 oval, angulated above and at the keel, with a long, narrow, deep, 

 slightly oblique canal in front ; exclusive of the canal, the mouth 

 is nearly one third of the whole length of the shell. Outer lip — 

 sharp and wrinkled on the edge, patulous, with many small, close- 

 set, deep-stretching, ridge-like teeth within ; it is straight above, 

 angulated at the keel, convex iu the middle, concave as it 

 approaches the canal, along w^hich it is straight. Inner lip — a 

 thick patulous glaze with a sharp and prominent edge, behind 

 which is a long narrow umbilical chink ; close to the upper angle 

 of the mouth is a long feeble tooth, and in the front of the mouth 

 and deep within are three very slight pillar-folds ; the beginning of 

 the canal is defined by a sharp little tubercle, answering to which 

 is the lowest of the outer lip-teeth. Operculum thick, horny, dark 

 brown, claw-like, with curved lines of growth ; on its inner face 

 are many concentric fine lines, with a broad, thick, rounded, 

 polished, exterior border. H. VJ. B. 0'95. Penultimate whorl, 

 height 0-3. Mouth, height 1, breadth 0-5. 



This species is not at all uncommon in museums under the name 

 of jP. (or Turiinella) carinifera, Lara., and is the species figured 

 by Eeeve as that of Lamarck, which is from the Pacific, and, 

 though similar, is certainly different. In spite of the absence 

 from the Geneva Museum of Lamarck's own specimens, of which 

 {teste his own entry on the margin of his copy of the ' Animaux 

 s. Vert.,' 1st edition, rii. 108, sp. 16, preserved at Geneva) he had 

 three, and in spite of his omitting to mention the strong lasal 



