402 A. S. Kennard Sf B. B. Woodward— Pliocene Mollusca. 



We have great pleasure in associating with this species the name of 

 Mr. P. W. Harmer, in recognition of his lifelong work among the later 

 deposits of East Anglia. 



2. Limn^a. Butleyejstsis, n.sp. 



Shell small, ovate-conic, thin ; spire elevated, somewhat turreted ; 

 apex acute; whorls 5 J, convex; suture deep; aperture ovate, slightly 

 contracted on the inner side ; umbilicus nearly closed. Pliocene — 

 Red Crag (Butleyian) : Butley, Hollesley, Suffolk. Norwich Crag 

 (Icenian) : Bramerton, Thorpe, Norfolk. Type in our collection. 



This is the L. truncatula, Mull. (?), of S. V. Wood ( Crag Moll., 

 vol. i, p. 8, tab. 1, fig. 8a), the Z. Rolbollii, Moll., of S. V. Wood 

 (op. cit., supp., p. 3), and the Z. truncatula, Mull, (pars), of 

 Kennard & Woodward (Proc. Malac. Soc, vol. iii, p. 197). 



This species may be distinguished from the polymorphic Z. truncatula 

 in being larger, in having the mouth more oval, whilst the whorls 

 increase much more regularly. It is doubtful if Z. Butlegensis has 

 any real affinity with Z. truncatula, nor can it be looked upon as 

 a possible ancestor of that species. The largest example we have 

 seen measures 12 mm. in height and 6 mm. in breadth. 



The measurements of the type-specimen are: height 10, breadth 

 5 mm. ; length of aperture 5, breadth 3*5 mm. 



3. Limn^a. Woodi, n.sp. 



Shell small, ovate-conic, thin ; spire elevated, little more than 

 half the total length, turreted ; apex rather acute ; whorls 4^, some- 

 what swollen ; suture deep ; aperture ovate, slightly contracted on 

 the inner side; umbilicus nearly closed; body-whorl striated parallel 

 with the aperture. Height 6, breadth 4 mm. ; aperture, length 3'7, 

 breadth 2 - 5 mm. Pliocene — Bed Crag (Butleyian) : Butley, Suffolk. 

 Norwich Crag (Icenian) : Bramerton, Norfolk. 



This is the Z. truncatula {?), Mull., var. B, of S. V. Wood (Crag 

 Moll., vol. i, p. 8, tab. 1, fig. 8b). It may be distinguished from 

 Z. Butleyensis by its much smaller size, shorter spire, and relatively 

 larger body-whorl. It is apparently a rare form, for we have only seen 

 one example ; this, which is in our collection, and is from Butley, we 

 take as the tj*pe. There can, however, be no doubt that the example 

 figured by S. V. Wood from Bramerton, which we have been unable 

 to trace, is identical. 



4. Planoebis pe^icuesoe, n.sp. 



Shell sinistral, discoidal, smooth ; spire depressed, nearly flat 

 beneath; margin slightly carinated; aperture simple, lunate, sub- 

 quadrate, oblique ; outer lip thin, inner lip slightly spreading over the 

 body-whorl. Pliocene — Bed Crag (Butleyian) : Butley, Hollesley. 

 Norwich Crag (Icenian): Bramerton, Southwolrl, Bulcamp, Coltishall. 



This is the P. complanatus, Linn., of S. V. Wood (Crag Moll., 

 vol. i, p. 9, tab. 1, figs. lOa-c) and the P. marginatus, Drap., of 

 Kennard & Woodward (op. cit., p. 197). It bears a superficial 

 resemblance to the recent shell which is now generally known as 

 P. umbilicatus, Mull., but it may be easily distinguished from that 

 species. It is much smaller, the rate of increase of the whorls is 



