466 REV. R. BOOG WATSON ON THE 



the sinus-area is occupied by a broadish, square, impressed fur- 

 row ; below this there is a square-edged shoulder caused by the 

 projection of the ribs at their origin ; this forms a blunt but 

 strongish keel. The rest of the whorl is covered by about 12 fine 

 rounded threads (exclusive of those belonging to the snout, which 

 is broken); the two threads at the keel are close-set ; the others 

 are pretty equal and equally arranged ; on the penultimate whorl 

 there are about 8 of these threads. Colour dead white, pro- 

 bably porcellaneous when fresh ; the apex is buff or sandy- 

 coloured. Spire high, scalar, conical. Apex small, high, conical, 

 with the typical straight bars above, and obliquely reticulated 

 ones below ; the two or three of the very tip are broken. Whorls 

 6 below the apex; they are short and broad, of slow regular 

 increase, with a drooping slightly concave shoulder, keeled, and 

 from the keel contracting conically to the inferior suture ; the 

 last whorl is very short and small, with a rounded convexly 

 conical base : the extreme point of the pillar and snout is 

 broken. Suture obtusely, but angularly, impressed. Mouth 

 oval. Outer lip almost semicircular, with an angle at the keel ; 

 its edge advances very far forward below ; above it forms a very 

 deep, wide, funnel-shaped sinus close up to the suture. Inner 

 lip slightly excavated, with a very small border. H. 0*36. B. 013. 

 Penultimate whorl, height 0*06. Mouth, height Ol, breadth 0*08. 

 (These measurements are of necessity, from the broken state of 

 the mouth, somewhat hypothetical ; but they are at least not 

 exaggerated.) 



58. Pletjrotoma (Defrancta) chtta, n. sp. (x VT ° s > cast.) 

 St. 73. June 30, 1873. Lat. 38° 30' IS"., long. 31° 14' W. 

 West of Azores. 1000 fms. Globigerifia-ooze. Bottom tempe- 

 rature 39°-4. 



Shell. — White, conical, ribbed, w T ith a high, subscalar, small- 

 pointed apex, a short tumid body-whorl, a rounded contracted 

 base, and a small snout. Sculpture. Longitudinals — there are on 

 the last whorl 14 ridge-shaped, round-topped, curved, oblique 

 ribs : they are not strong, originate in small rounded beads at an 

 angulation below the sinus-area, and die out on the base : they 

 are parted by shallow rounded furrows of double their breadth ; 

 on the first regular whorl they appear as simple beads 9 in 

 number ; on the next whorl they assume the form of straight 



