304 LAND AND FEESIIWATEB 



pale brown ; spire depressedly conoid, apex blunt ; suture im- 

 pressed ; whorls 3, very tumid and well rounded on the periphery ; 

 aperture nearly circular ; peristome tliin ; coluniellar margin 

 thickened and slightly reflected and extending as a callus on to 

 the last whorl. 



This shell is more globose than P. raiccyla and not so high in 

 the spire which tapers more rapidly. It is also costulate as in 

 the Pujnsoma figured on Plate CXXXII. fig. 2, a single specimen 

 of which was sent to me by Mr. Sykes, and cannot now be found. 

 Mrs. Longstafi: writes: — "Numerous on palm, Florence Hotel 

 Garden, Kandy. Animal, body light grey, only one pair of ten- 

 tacles, dark. Tail pointed." 



I was fortunate in seeing the radula in the first specimen I 

 examined. Nothing could be seen of the genitalia. The mantle- 

 zone was simple, with no shell-lobes. 



There are not many teeth in the row, only some 15 or 16 ; all 

 are large (juadrate plates. The central tricuspid, the adraediaus 

 and laterals bicuspid, the inner cusp long, the outer small and 

 basal. The jaw was crumpled up, and being so minute was not 

 well seen, but it appeared to be smooth. 



I am much indebted to Mrs. Longstaff for placing this species 

 in my hands, and I have named it after its discoverer. 



At page 241 I referred to species of MacrocTilmnys found in 

 Mauritius. When drawing the shell, and describing the animal 

 of the Cachar form of M. indica (p. 264), I thought it a good 

 opportunity, for the sake of comparison, to figure the shell of the 

 animal 1 described in the Proceedings of the Malacological Society, 

 vol. vi. (1905) p. 320, pi. xviii. figs, i-iv, there referred to as 

 Sp. A, Mauritius. This description shows how similar the 

 anatomy is to the above-named i¥. indica : only a noticeable 

 difference is found in the formula of the radula, which has nearly 

 double as many admedian teeth, and a greater number in the 

 row, viz. : — 



46 . 20 . 1 . 20 . 46 or 66 . 1 . 66, 



as against 20 . 1 . 10 . 1 . 10 . 20 or 31 . 1 . 31 



of the above Indian species. Another species very close to 

 specimen A was taken by Monsieur Dupont in a farm-yard in 

 Port Louis. In this the formula is 



24 . 2 . 15 . 1 . 15 . 2 . 24 

 or 41 . 1 . 41, 



a reduction of the admedian teeth. M. Dupont also sent two 

 specimens of a form from the Comoro Islands which T take to be 

 ]\I. renitem, Morelet. It was interesting to find it had the same 

 radula formula as the last-mentioned, and that the shells were 

 similar: therefore I consider all three to belong to the Comoro 

 Island form {M. renilens). Specimen A, with a larger shell and 

 rather different radida, I describe as follows : — 



