SCIENCE-GOSSIP. 



171 



parietal wall with its folds). The palatal arma- 

 ture is in two series, the anterior one consisting of 

 four elongated horizontal folds, the second and 

 third being separated by a wider space than the 

 others, while the posterior series is composed of 

 thirteen or fourteen minute denticles arranged 

 close together, some a little elongated. The shell 

 figured is in the British Museum. It measures — 

 major diameter, 8 millimetres ; minor diameter, 

 6-5 millimetres ; altitude, 4-5 millimetres. 



Plectopylis feddeni (figs. 6A,a-d), from Prome, in 

 the Pegu district of Burma, was described by Mr. 

 W. T. Blanford in the " Journal of the Asiatic 

 Society of Bengal," xxx. (1865), P- 75- The shell 

 was figured in Hanley and Theobald's " Con- 

 chologia Indica" (1875), t, 131, ff. 1-3, while 

 Lieut. -Colonel Godwin-Austen has illustrated the 

 parietal armature ("Proceedings Zoological Soc- 

 iety " (1874), t. 74, f. 7), and as I have been unable 

 to obtain a specimen, I have copied these figures. 

 According to Mr. Neville's Hand List, p. 71, the 

 Calcutta Museum possesses specimens from Thyet- 



the anterior side of the first vertical fold, is found 

 a small denticle. Above and below there is a 

 similar free horizontal fold (see fig. 64(f). The 

 palatal armature consists of five folds, which are 

 at first horizontal but become vertical posteriorly ; 

 the first and second are longer than the rest. The 

 measurements are stated to be — major diameter, 

 16 millimetres; minor diameter, 13 millimetres; 

 altitude, 45 millimetres. 



(To he continued.) 



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Fig. 6^.— Plectopylis feddeni. {a-c, after Hanley and 

 Theobald ; d, after Godwin-Austen.) 



myo. The description and figures referred to 

 show that the shell is sinistral, discoid, very 

 widely umbilicated, thin, whitish, irregularly and 

 obliquely sculptured ; the spire is plane and the 

 suture impressed. There are six and a-half to 

 seven narrow whorls, which increase slowly and 

 regularly, and are a little convex above; the last 

 is much wider, rounded at the periphery and base, 

 and abruptly descends in front. The peristome 

 is a little thickened and reflexed, and the margins 

 are united by a raised flexuous ridge. From 

 the middle of the ridge a horizontal, entering, 

 interrupted fold is given off. The parietal arma- 

 ture consists of three vertical folds, of which 

 the posterior one is longest and free, and gives off 

 posteriorly at its lower extremity a short ridge ; 

 the two anterior ones are equal in length and are 

 united by two horizontal folds, of which the upper 

 one continues anteriorly to the ridge at the aper- 

 ture, while the lower one is very short and projects 

 only a little way beyond the first vertical fold ; 

 between these two horizontal folds, and close to 



