364 THE VOYAGE OF H.M.S. CHALLENGER. 



more crowded and parted by rounded threads of the same strength aod form as them- 

 selves ; the angle of the whorls occurs about the middle of each, and is sharp above, but 

 feeble and blunt on the body-whorl. Colour porcellanous white, under a straw-coloured 

 membranaceous epidermis. Spire high, conical, subscalar. Apex is very small and 

 (apparently, for the tip is broken) sharp ; two whorls remain, 1^ to 2 have been broken ; 

 they are russet-yellow, the last ends in a sinuated lip ; the upper part of each is scored, 

 with short straight bars above and cancellations below. Whorls 6j besides those of the 

 apex ; above they have a sloping, just appreciably concave shoulder, about the middle each 

 is obtusely carinated ; this keel is sharp above, but very feeble on the elongated rounded 

 body-whorl ; the base is drawn out into a longish triangular snout, which is squarely 

 truncated in front. Suture oblique, fine, but distinct. Mouth elongately pear-shaped, 

 angulated above, and broadly, obliquely channelled below. Outer lip thin, well but flatly 

 curved ; it has a very deep, open sinus, which lies close up to the suture ; below this the 

 lip-edge sweeps very far forward, and again retreats towards the point of the shell. Inner 

 lip : a barely appreciable glaze lies on the body : the line of the lip is concave, the pillar 

 is fine, a good deal narrowed, and cut off in front by a long-drawn, twisted, rounded 

 edge. H. 0*88 in. B. 0-33. Penultimate whorl, height 0'17. Mouth, height 0-42, 

 breadth 0-17. 



18. Clathurella phyxanor, 1 n. sp. (PI. XXVI. fig. 14). 



Station 106. August 25, 1874. Lat. 1° 47' N., long. 24° 26' W. Mid-Atlantic. 

 1850 fathoms. Globigerina ooze. Bottom temperature 36°'6. 



Shell. — Thin, tumid, subequally biconical, white, subangulated, cancellated, with 

 longitudinal and spiral threads, subscalar, with a squat, conical, small, yellow-tipped 

 spire, an impressed suture, a tumid body-whorl, a short rounded base, and a triangular, 

 small-pointed, longish, one-sided snout. Sculpture : Longitudinals — below the suture the 

 whorls are closely scored with little concave bars, the cusps of the old sinuses ; below 

 these bars, above the angle of the shell, there originate oblique threads, which at the angle 

 become nearly perpendicular : on the spire these form little tubercled riblets, of which 

 there are about 25 on the penultimate whorl, but on the body-whorl they become somewhat 

 obsolete ; they are parted by broad shallow intervals ; besides these there are numerous 

 coarse but feeble lines of growth. Spirals — the upper whorls are angulated below 

 the sinus-area ; close to this angulation, both above and below, there are 3 or 4 unequal 

 but rather weak threads ; on the side of the whorls are three flat strongish threads, on 

 the body-whorl these all are less distinct, and the whole base and snout are covered with 

 flat, broad threads, and very slight, shallow, squarish furrows ; where these threads cross 

 the longitudinals they tend, especially on the upper whorls, to rise into small tubercles. 

 1 <j>vl-diiciio, man-avoiding, so called from the depth and distance of its dwelling. 



