EEPORT ON THE GASTEROPODA. 161 



the whorls, which on the last is slight ; this angulation is marked on the earlier whorls by 

 a spiral thread, which rises into a little knob on the ribs ; on the last whorl the whole 

 surface (except just below the suture) is covered with close-set, equal, irregular, rounded 

 threads, on which the longitudinal lamellae rise into vaulted scales ; the point of the 

 snout is a twisted cord scored with the old canal-scars. Colour yellowish dead-white, 

 with a ruddy chestnut tip. Spire rather high, conical, subscalar. Apex chestnut, 

 turbinated, small, blunt-pointed, consisting of 3^ rounded polished whorls, which end 

 with a distinct, prominent, reverted, and sinuated edge. WJiorls 8 to 9 in all ; they 

 are conical and shouldered above, angulated about the middle, below which they are 

 cylindrical ; the last is scarcely angulated, rather small, rounded, with a short contracted 

 base produced into a small equal-sided snout, which is nicked at the point. Suture very 

 slight, linear. Mouth oblong, pointed and channelled above, and still more below, where 

 there is a rather broad, open, oblique canal. Outer lip scarcely patulous, well arched, 

 thin on the edge ; there is a slight varix within, and 5 very insignificant tubercles for 

 teeth. Inner lip forms a continuous curve across the body and down the pillar, which is 

 obliquely cut off in front ; the labial callus is a little thickened at the top, and is narrow, 

 with a well-defined edge ; there are one or two feeble tubercles on it in front ; behind 

 the callus at the point is a very slight and superficial umbilical depression. H. 0*46 in. 

 B. 0-25. Penultimate whorl, height 0-09. Mouth, height 0-26, breadth 0*1 1. 



This is an inconspicuous little shell, somewhat more angular and conical than Murex aciculatus, 

 Lam. The spire is not unlike that of Murcx cdwardsii, Payr. ; but the last whorl is much 

 smaller than in that species, and the whole sculpture is different and much more delicate. 



I am indebted to Dr Gwyn Jeffreys for correcting my determination of this shell, which I 

 had considered new. I have long had it from Madeira, and never having seen Brocchi's species, 

 failed to recognise it in his figure, which is stumpy in form, and high and angularly shouldered ; 

 differing in this respect nearly as much from Dr Gwyn Jeffreys' fossil shell, as from my living 

 Madeiran specimens, or the one got by the Challenger at the Azores. Careful examination, 

 however, convinced me that Dr Gwyn Jeffreys' shell is the same as mine, and that they agree very 

 well with Brocchi's description of Murex fusulus. 



23. Murex (Pseudomurex) aedonius, 1 n. sp. (PI. XVII. fig. 5). 



Station 135c. October 17, 1873. Lat. 37° 25' 30" S., long. 12° 28' 30" W. Nightin- 

 gale Island, Tristan da Cunha. 100 to 150 fathoms. 



Shell. — Strong, biconical, scalar, with a high spire, a small apex, and a short wedge- 

 shaped, twisted, barely emarginated snout. Sculpture : Longitudinals — there are on each 

 whorl about 8 broad, coarse, hunchy ribs, which extend from suture to suture, and whose 



1 dti&otiof, belonging to a nightingale. 



(ZOOL. CHALL. EXP, — PART XLII. — 1885.) ft 21 



