On a new Species of Paludestrina. 191 
species, except that there is a marked notch at the centre of 
the inner basal cingulum of the upper canines, visible in the 
buccal aspect of the teeth. The very considerable difference 
mare actual size of the teeth is shown in the following 
table :— 
P, perotiss P, Trumbulli, 
mm. mm. 
Upper incisors, combined breadth at base... 3:8 33 
Upper canine, length from cingulum ante- 
THOVLY ics tiecceehs Mejee heart oe eter tenes 55 4:0 
Upper canine, greatest diameter at base, 
oriz ontalllye st. seiccs'are:stere. cae ore spereree . 39 2°8 
Large premolar and first two molars, com- 
binedMenpihw.sioee, fccsciaec bcd ws « 85 6:8 
Lower canine, height from cingulum ex- 
BEDE y hs a sieetieyaceosavnpa! Savoy tasiel ses seeetspale.e Seb 40 
First lower premolar, transverse diameter.. 2°2 15 
First lower molar, transverse diameter .,.. 2°5 19 
Specimens of P. pe. vids from Bolivia (Bridges) and Lagoa 
Santa (Reinhardt) have teeth agreeing closely in size with 
those of the example measured, which came from Cordova 
(White). 
Forearm of the type (the epiphyses not yet fully united) 
73 millim. 
Hab. Paya. 
Type. Skin. B.M. no. 99. 11. 2.1. Collected 7th June, 
1898, and presented by J. Trumbull, Esq. 
XXITI.—Notice of a Species of Paludestrina new to the British 
Fauna. By EpGar A, SMITH. 
In October last year Mr. Lionel P. Adams sent for my 
inspection a number of specimens of a very small species of 
Paludestrina which had been obtained in the canal at 
Dukinfield, Cheshire. 
Three weeks later other specimens were forwarded to me 
by Mr. F. Taylor, of Oldham, who informed me that he was 
the first to discover the presence of this shell at the above 
locality. 
It is certainly quite distinct from the other British species 
and at present has not been identified with any foreign form, 
It has been suggested by Mr. Adams and others that possibly 
it may be an introduction from North mug rou been 
