SCIENCE-GOSSIP. 



28^ 



periphery, and the fimbriae are coarser, longer and 

 more persistent. The specimen shown in figs. 72 

 ii and /', from Sse-Tchuan, Chma, is one of two 

 sent to me by Dr. von. Mnllendorfl ; it measures: 

 major diameter, 75 milHmetres ; minor diameter 

 65 millimetres ; altitude, 375 millimetres. 



Plectopylis livchuspira (figs. 73i<-t'), from Mount 

 Licos, Cebu, I'hilippine Islands, was described by 

 Dr. von Mollendortt in the " jahrbuch der Deuts- 

 chen Malakazoologischen Gesellschaft," xiv. (18S7), 

 p. 273, and the shell was figured in the same work, 

 t. 8, f. 9. The armature, however, was not illus- 

 trated, and 1 believe the fi,yurcs now given are the 

 first which have appeared. The shell is dextral, 

 widely and deeply umbilicated, depressed-conical, 

 light corneous, finely ribbed above and striated 

 below. The spire is conical and the suture im- 

 pressed. There are six narrow rounded whorls, 

 which increase slowly and regularly ; the last, 

 considerably wider than the penultimate, has a 

 thread-like keel at the periphery, is angulated 

 round the umbilicus and does not descend in front. 

 The aperture is diagonal, lunate ; the peristome 

 white, a little thickened and reflexed, the margins 

 being slightly convergent and united by a scarcely 

 raised sinuous ridge at the parietal callus. The 

 parietal armature consists of two long, parallel, hori- 

 zontal folds, which revolve over nearly half a whorl, 

 the upper one being the stronger and united to the 

 ridge at the aperture, while the lower one is thinner 



Plectopylis tiochospiya, \-a.r.bohoknsis{}). Two speci- 

 mens kindly lent to me by Rlr. Ponsonby, labelled 

 with the manuscript name, "Plectopylis troclwspiiu 



Fig. y^.—PleLtopylii. tioclioipnu var. bohoUnhis. 



var. boJioliiisis (Mollendorfi)," certainly represent a 

 distinct variety. They are smaller than the type, and 

 the umbilicus is narrower. The armature is nearly 

 identical, but the palatal folds are connected at 

 their posterior terminations by a very slight trans- 

 verse sinuous ridge, plainly discernible externally 

 through the shell-wall. 



(To be lunltnncd.) 



d c 



Fii?- 75-—T'tectopylis tyoclwspini. 



and terminates at a short distance from the ridge ; 

 a very thin, short horizontal fold occurs posteriorly 

 a little below the upper fold (see fig. 73^, which 

 shows the parietal wall of the shell with its folds). 

 The palatal armature is composed of five short, 

 thin, horizontal folds, which descend a little 

 anteriorly (see fig. j^d, which shows both the 

 parietal and the palatal armatures from the 

 posterior side). The specimen figured is in the col- 

 lection of Professor Oscar Boettger, of Frankfort, by 

 whom this shell — which measures ; major diameter, 

 4 millimetres ; minor diameter, 35 millimetres ; 

 altitude, 2 millimetres — was obligingly lent to me. 



Plectopylis tiochospira is allied to P. qiuulntsi {ante 

 p. 71, f. 54), but it is larger and much lighter in 

 colour ; there are also certain difJerences in the 

 armat.u.re. 



(1) Plectopylis tiocho^pira var. bvlioltiisis, n. var. (tif;. 74), 

 Hitlers from the type in bein^ smalU r and having a narrower 

 umbilicus. Major diameter, 3-25 millimetres ;minoi diametEi , 

 ,S ndllimttres; altitude, 175 mlllmetres. Habitat. Bchol 

 Island, Philipi)iiie Islands. Tyjie in Mr. Ponsonby's col- 

 lection. 



