REPORT ON THE GASTEROPODA. 283 



below, of slow aud regular increase ; the last is small, with a rounded elongated base and 

 a small somewhat longish snout. Suture strongly marked by the constriction above it, 

 and marginated by the puckered thread below. Mouth club-shaped. Outer lip thin, 

 with a sinus strong rather than deep, V-shaped, extending from the suture, and having 

 its apex at the keel. Inner lip thin, concave above, then direct, and then at the canal 

 strongly cut off to the left, and having a slight twist on its edge. H. 0"92 in. B. 0"3. 

 Penultimate whorl, height 0'14. Mouth, height 0*44, breadth 0*16. 



I do not know anything that this is very like. Perhaps in form it may be said to resemble a 

 little Pleurotoma fusca, Homb. and Jacq., but the sculpture is quite different. 



9. Pleurotoma phymatias, 1 n. sp. (PI. XXVI. fig. 2). 



Station 205. November 13, 1S74. Lat. 16° 42' N., long. 119° 22' E. Philippines. 

 1050 fathoms. Blue mud. Bottom temperature 37°. 



Shell. — Bather high and narrow, thin, white, angulated and tubercled on the angle, 

 spiralled, with a short round base, small snout, and openly constricted suture. Sculpture : 

 Longitudinals — there are only harsh, irregular, unequal lines of growth. Spirals — the 

 shell is rather broadly carinated in the middle of the whorls by three fine threads, which 

 are united and made prominent by a series of narrow elongated tubercles — this is where 

 the apex of the sinus occurs ; the whole base and snout are scored with feeble threads, 

 one of which, about half-way down the base, is a little more prominent than the rest ; 

 the shoulder of the shell above the keel has also some spiral threads, of which the 

 one nearest the suture is also studded with small tubercles. Colour greyish yellow. 

 Spire high, conical ; its profile lines are cut into zigzags by the projecting keels of the 

 successive whorls and the contracted sutures between. Apex broken. Wlwrls 5^ alone 

 remain ; they are of slow increase, are biconical, contracting (with a straight outline) from 

 the keel into the suture both above and below ; the last is short, with a slightly tumid 

 rounded base contracting into a small equal-sided snout. Suture very distinct, being 

 contracted, impressed, and sub-marginated below ; it is little oblique. Mouth pear- 

 shaped ; sharply pointed above and below. Outer Up very thin, with a very deep open 

 U-shaped sinus, which is separated from the suture by a large broad triangular shelf ; 

 the edge of the shell sweeps very far forward from the sinus and then advances straight 

 down the canal. Inner lip has a thin glaze on the body ; its line is concave above, then 

 straight down the pillar, the point of which is cut off to the left and very much twisted 

 at the point, leaving the short narrow oblique canal very open. H. 0-81 in. B. - 37. 

 Penultimate whorl, height 0*14. Breadth of first remaining whorl, O'll. Mouth, height 

 0-37, breadth 0"19. 



1 <f>u/j.uria;, one who has tubercles. 



