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



3. Cancellaria imbricata, Watson (PI. XVIII. fig. 10). 



Cancellaria imbricata, Watson, Prelim. Report, pt. 12, Journ. Linn. Soc. Lond., vol. xvi. p. 325. 



Station 142. December 18, 1873. Lat. 35° 4' S., long. 18° 37' E. Off Cape of Good 

 Hope. 150 fathoms. Green sand. Bottom temperature 47°. 



Shell. — Oval, with a smallish, high, subscalar, blunt spire, a semicircular mouth, and 

 a rough spirally striated surface ; yellowish white. Sculpture : Longitudinals — on the 

 upper whorls there are some slight rather distant ribs, which pass over on the later whorls 

 into rough imbricated appressed laminae covering the whole surface. Spirals — there are 

 flatly rounded threads parted by intervals of twice their breadth ; below the suture 2 are 

 feeble, 4 in the middle are strong, 5 on the base are narrow and sparse, and 5 to 6 on the 

 snout are slight and close : besides these, there are minute spirals and lines of growth 

 which reticulate crisply the whole surface. Colour porcellanous white, beneath a yellowish 

 surface, which is quite stripped of epidermis. Spire high, rather small, conical, subscalar. 

 Apex blunt and globose, consisting of if rounded embryonic whorls, of which the extreme 

 tip is very much depressed on one side. Whorls 5 in all, well rounded, the earlier small 

 and of slow increase, the last large, with a short base and a small snout. Suture impressed. 

 Mouth rather large, semicircular. Outer lip regularly rounded and open, strongly seamed 

 within by the spirals of the surface. Inner lip : a very thin glaze spreads broadly over 

 the body, but narrows and thickens on the small hollowed and twisted pillar, leaving a 

 very minute chink in front ; there are below the middle of the pillar two strongish, very 

 oblique white teeth ; and the twisted edge of the pillar is prominent and sharp. H. 0'8 in. 

 B. 0-5. Penultimate whorl, height 0-16. Mouth, height 0"46, breadth 0"3. 



The specimen of this species is perhaps not quite full-grown. The whole aspect of the shell 

 suggests an Admctc ; but the teeth on the pillar are stronger than is usual in that group. It is 

 much shorter in the spire, broader in the whorls, and more delicately sculptured than Cancellaria 

 turrita, Sow. 



4. Cancellaria (Admete) specularis, Watson (PI. XVIII. fig. 11). 



Cancellaria (Admete) specularis, Watson, Prelim. Report, pt. 12, Journ. Linn. Soc. Lond., voL xvi. 



p. 325. 



Station 149b. January 17, 1874. Lat. 49° 28' S., long. 70° 30' E. Near entrance 

 of Royal Sound, Kerguelen. 25 fathoms. Volcanic mud. 



Station 151. February 7, 1874. Lat. 52° 59' 30" S., long. 73° 33' 30" E. Off Heard 

 Island. 75 fathoms. Volcanic mud. 



Shell. — Small, ovate, striated, with a shortish, scalar, blunt-tipped apex, a rounded 

 base, very small snout, and semicircular mouth. Sculpture: Longitudinals — there are 

 strongish numerous hair-like lines of growth. Spirals — below the suture is a shoulder 

 marked by an angulation carrying a thread ; the shoulder is indistinctly scored with spiral 



