W. H. Hudleston—The Yorkshire Oolite. 399 
 Deseription.—Fig. 3a. Specimen from the Coral Rag of Ayton 
(Leckenby Collection). 
MUA PEE, ha ais he Vala 2) aid reRe bie git wane Sree We v9 27 millimétres. 
Length of body-whorl to entire shell.......... 48 : 100. 
SIPITAIPAN OE sc dyarc.e iorw/slorera’s puerainin ete a viv-o'e'arele » 33°, 
Shell conical, smooth, not umbilicated, spire composed of nine 
whorls, very regular in outline, scarcely convex, and devoid of 
visible ornament. Sutures close, not very marked. Body-whorl 
about equal in height to the entire length of the shell. Outer lip 
very straight, which gives the mouth an angular appearance. Shell 
substance thick. 
Fig. 3b.—Specimen from the Coral Rag of Brompton (Strickland 
Collection). Restored it would have a length of about 33 mm., with 
a spiral angle of 33°, and the body-whorl is a little higher in propor- 
tion to the entire shell than in the other specimen. Only four 
whorls remain. It would appear to represent a larger individual of 
the same species as the last. The shell substance ist very thick. 
Relations and Distribution.—The flatness of the whorls, and the 
straightness of the outer lip, in addition to the spiral angle, may 
serve to distinguish this species from any other Pseudomelania in 
Yorkshire of like age. The two specimens figured are the only ones 
known to me. 
14.—PsEvDoMELANIA Buvienrert, auctorum. Plate XIV. Figs. 4a. 
and 4b. 
Bibliography, etc.—Shells more or less answering to the description 
of the two here figured were recorded in the lists of the Corallian 
Rocks of England, and in the Table of Fossils of the Corallian Rocks 
of Yorkshire, as Ps. Buvigniert, D’Orbigny (Terr. Jur. vol. ii. p. 325, 
pl. 325, figs. 3—5). D’Orbigny’s species is, however, only 10 mm. 
long, and in the description the author gives the length as one of 
the characteristic features. In some collections similar forms are 
referred to Phasianella elegans, M. and L. (Gr. Ool. Moll. p. 74, pl. 
xi. figs. 27, 27a.), and the larger of the two specimens figured has 
considerable resemblance, though the differences are not difficult to 
point out. Altogether the name now adopted must be regarded toa 
certain extent as provisional, and even the grouping of 4a and 4b 
under one denomination as more or less open to question. 
Description. Fig. 4a. Specimen from the Coralline Oolite of 
Nawton (my Collection), 
Tenpth (restored). «6.00 oie s ttsss cle delceew ene 27 millimétres. 
Length of body-whorl to entire shell.......... 52: 100. 
Spiral ADO) A ateret ho ce ee cc Neither ol ht Hears Sisal oh okeds 42°, 
Shell short, conical, smooth, not umbilicated. Whorls probably 
about eight in number, increasing regularly under an angle of 42°, 
convex, perfectly smooth and devoid of ornament, sutures distinct. 
Body-whorl tumid and in height very slightly exceeding the rest of 
the spire. Mouth very oval ‘and regular with a slight “callosity on 
the inner side. 
Fig. 4b.—Specimen from the Coral Rag of Brompton (Strickland 
Collection). 
