378 PLIOCENE MOLLUSCA. 



Dimensions. — L. 6 mm. B. 2'5 mm. 



Distribution. — Recent .• western Hebrides. 



Fossil : Coralline Crag : near Woodbridge. 



Remarks. — The small specimen from the Coralline Crag here represented seems 

 to agree closely with the one dredged by Carpenter and Thomson in 189 fathoms, 

 abont 50 miles N. of the Butt of the Lewis, which was figured by Jeffreys in his 

 British Conchology and referred by him to P. galerita, a Sicilian species described 

 by Philippi. 1 If Philippi's figure is correctly drawn, however, the latter differs so 

 widely, both in form and sculpture, from the shells now in question that it is 

 difficult to consider they can be the same. The one given below as D. galerita 

 (PL XXXIX, fig. 36) seems to agree more nearly with what Philippi regarded to 

 be the typical form of that species. I suggest the specific name of Jeffregsii for 

 the Crag specimen (fig. 35) and for that described by Jeffreys. 



Those figured in PI. XXVII, figs. 16 and 17 as Drillia icenonnn, with which 

 Wood identified the P. semicolon of pi. vi, fig. 3 a of his Monograph of 1848, are 

 larger and more coarsely sculptured, belonging, I consider, to a different species. 



A granulated spiral ornamentation is a common feature of the fossil Pleuro- 

 tomidae, making the correct identification of many of our Crag specimens, often 

 imperfect or waterworn, a matter of considerable difficulty. D. Jeffreysii, for 

 example, resembles more or less nearly the North German Miocene Pleurotoma 

 Hosiun of Von Koenen, but a careful comparison of specimens of the two shows, I 

 think, that they are distinct. 



Whatever our shell may be, I do not consider it is the P. galerita of Philippi ; 

 Canon Norman quotes a letter on the subject he had received from the Marchese 

 di Monterosato (op. cit.), in which the latter states that Jeffreys' shell is a different 

 species from the Sicilian Fossil. 



Drillia galerita (Philippi). Plate XXXIX, fig. 36. 



1915. Drillia galerita, F. W. Hanner, Plioc. Moll. Gr. Brit,, pt, ii, p. 228. 



Rem,arhs. — On p. 228 I mentioned the occurrence of several specimens from 

 Oakley which I was then disposed to refer to D. galerita, Phil. One of these 

 (fig. 35) I describe above as a new species under the name of D. Jeff'reijsii ; 

 another (fig. 36), which corresponds more nearly with his type form, may perhaps 

 be a variety of Philippi's species. 



1 Euuni. Moll. Sic, vol. ii, p. 172, pi. xxvi, fig. 15, 



