370 PLIOCENE MOLLUSC A. 



A. ventricosa, excavated below; spire conical, regularly diminishing in size towards 

 a blunt point; suture fairly deep ; ornamented by excessively fine and inconspicuous 

 spiral lines extending to the base of the shell, and by the lines of growth ; mouth 

 oval, angulate above, rather longer than the spire; outer lip thin, gently curved; 

 inner lip forming a very thin glaze on the columella which is excavated in the 

 middle ; canal short, rather wide, turning to the left. 

 Dimensions. — L. 40 mm. B. 21 mm. 

 Distribution. — Recent : Banks of Newfoundland. 



Fossil: Bridlington. 

 Remarhs. — On p. 171, PI. XXIII, fig. 20, I described a specimen from the 

 Newbournian Crag of Felixstow as Neptunea ventricosa which corresponded very 

 closely with the recent Newfoundland shell given by Gould as Fusus ventri- 

 cosus, but not so nearly with that represented by Wood, although with some doubt, 

 under the same name. There is a Bridlington fossil, however, at the Sedgwick 

 Museum agreeing with Wood's figure. It bears a note in Jeffreys' writing — - 

 "Fusus (Trophon) ventricosus, Wood, not De Kay," De Kay's species being the one 

 described by Gould (op. cit., p. 373). The body-whorl of the latter is larger in 

 proportion to the total length (four- fifths), is decidedly ventricose, the spire is 

 shorter and obtusely conical, and the canal turns more distinctly to the left. The 

 specimen from Bridlington now given as NepAunea tenuistriata 1 is undoubtedly the 

 recent Newfoundland Fusns st)-i<it/t* of Reeve, a more slender and as I think a 

 distinct form with a longer spire, of which I received some examples from my 

 friend Dr. Sparre Schneider some years ago. One of these is now figured together 

 with the Bridlington fossil. I agree with Jeffreys that they are not the F. ventri- 

 cosus of Gould, but whether the difference is specific or varietal may be perhaps a 

 matter of opinion. I suggest to the student a comparison of Gould's figure 

 together with mine of 1914 (PI. XXIII, fig. 20) on the one hand, with that of 

 Reeve's F. striatus, Wood's Troplion ventricosus of 1872 (op. cit., p. 22), and those 

 now figured, on the other. 



Genus SIPHO, Klein, 1753 (continued from p. 200). 



Klein's generic name Sipho is still used on the continent of Europe in most 

 conchological works. It has been recently claimed, however, that Tritonofusus 

 (Beck, 1847) should be substituted for it 2 on the ground that at a meeting of the 



1 As the specific name striatus had been used for a shell belonging- to this group before the time 

 of Reeve, I suggest for the present form that of tenui striata. 



2 The generic term Tritonofusus was at one time adopted in America in place of Sipho, but it lias 

 already been changed to Colus, as by Dr. Dall (Proc. Biol. Soc. Washington, vol. xxix, p. 7, 191(j), 

 and by Mr. C. W. Johnson (Bost. Soc. Nat. Hist., Occ. papers, vol. vii ; Fauna of New England, 

 pt, xiii, p. 137, 1915). 



