MAKSUAI.l. : ADUrnoNS TO BKniSH CONCHOLOGY. 187 



of this form, says that he owes " a sight of the Mediterranean shell 

 to the Marquis di Monterosato," and that it "has an embryonic 

 apex of 2\ whorls, which are dull and roughish." This clearly marks 

 it off from C. tubercularis, and though he does not give a figure he 

 adds — "The figure in 'British Mollusca ' leaves very much to be 

 desired ; it wants the apex, it presents a quite fictitious mouth and 

 pillar, and fails to catch the general sculpture and the ornamentation 

 of the base.'" Neitlier Clark's original specimen, nor either of 

 mine, possess the apex, nor have I seen a British specimen with that 

 part perfect. A new and undescribed species of Cerithiopsis dredged 

 by the ' Porcupine ' on the Adventure Bank in 92f., by the 'Shear- 

 water' in the same district in i2ot., and off the Tripoli coast in i4of, 

 resembles this and C. bilineata in every respect but that of the 

 apical whorls, which are essentially different ; I propose to name it 

 C. papillaris on account of the form of the tubercles. 



Among other forms of C. tuberailaris is one in which the upper 

 row of tubercles in each whorl is more or less aberrant, becoming 

 thread-like towards the apex ; and in another, which is more of a 

 monstrosity, the last whorl has no tubercles, being ornamented with 

 spiral ridges only. Of the four-rowed monstrosity mentioned by 

 Jeffreys I have seen but one British example : it must be very rare ; 

 but I have three specimens from the Tripoli coast, and these have in 

 addition an extra keel round the base. Another unnamed variety, 

 from the Scillies and Torbay, has smaller and more crowded 

 tubercles, with one of the whorls variced ; and a remarkably graceful 

 pyramidal form comes from the same districts. Jeffreys figures the 

 type well ; Sowerby's is too broad, the tubercles are wrongly con- 

 tinued to the base, and the characteristic apex is omitted. 



C. barleei Jeffr. — 12 to 40 fathoms, scarce everywhere except in 

 the Scilly Islands. S.VV. Ireland (R.I. A. cruise) ; Wexford coast, 

 4of. (Walpole) ; Guernsey, 2of. ; Land's End ; Eddystone, 3of. ; off 

 Berry Head, Torbay, and Babbacombe Bay, i2-i5f. ; Freshwater 

 West ; off Cork Harbour, 2 6f. ; Lundy Island and the Irish Channel, 

 2o-4of. ; off Loch Ryan, 2 7f ; Ailsa Craig, 25^ ; lona, 2of. It has 

 not hitherto been recorded from the Hebrides, where it appears to 

 be very rare ; I have only a single specimen from each of the three 

 Hebridean localities I have given. Although personally I have not 

 dredged largely among the Hebrides, I am very well acquainted 

 with their molluscan fauna, having when a young collector received 

 many a parcel of dredged material from Mr. Barlee, Mr. MacAndrew, 

 Dr. Gwyn Jeffreys, and especially Admiral (then Captain Bedford), 

 who was for some time on the survey of the Hebrides. 



I Cerithiopsides from the N. Atlantic, Journ. Liun. Soc.,«i8S5, vol. xix., p. 93. 



