40 ENDODONTID^E. 



very tumid and well rounded on the periphery ; aperture nearly 

 circular ; peristome thin ; columellar margin thickened and 

 slightly reflected and extending as a callus on to the last whorl." 

 ( Godwin- Austen.) 



Hab. Ceylon : Kaudy (Mrs. Longstaff). 



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

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

 the Pupisoma figured on plate 132, fig. 2, a single specimen of 

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

 Mrs. Longstaff writes : " Numerous on palm, Florence Hotel 

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

 tentacles, 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. 



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

 all are large quadrate plates. The central tricuspid, the ad- 

 medians 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/ (Godivin- Austen.) 



Genus SPHYRADIUM, Charpentier. 



Sphyradium, Charpentier, Neue Denkschr. Allg. Schweiz. Gesells. 



Naturw. i, 1837, 2nd art. p. 15 (as section of Pupa) ; Sterki, 



Nautilus, x, 1896, p. 75. 

 Paludinella, Lowe, P. Z. S. 1854, p. 206. 

 Edentulina, Clessin, Deuts. Excurs. Moll. Fauna, 1876, pp. 189, 208 



(non Pfeiffer, 1856, sect. Ennea). 

 Columella, Westeiiund, Fauna Palaarct. iii, 1887, p. 125. 



Range. Europe ; North America ; India. 



Shell cylindrical, pupoid ; aperture radial ; peristome simple, 

 straight, with thin margins. 



Anatomy unknown. 



" Jaw low, composed of distinct plates. Radula with the teeth 

 comparatively small, their cusps very short and small ; transverse 

 rows of teeth in edentulum varying from 116 to 127, each row 

 containing r+21 (20). The centrals are tricuspid, the laterals 

 all bicuspid except the last, which is a minute nodule; in the 

 others there is no difference of laterals and marginals, but that 

 the plates of attachment become shorter towards the margins and 

 evanescent in the outer teeth. The radula is 0-55 mill, long, 

 0-14 wide." (SterJci.) 



The species constituting the group Sphyradium were for a long 

 time regarded as pertaining to Pupa until Dr. Sterki, in 1896, 

 from an examination of the radula and jaw of S. edentulum, came 

 to the conclusion that Sphyradium was more nearly allied to 

 Punctum. On concihological grounds he had already previously 

 held the opinion that it had no affinity with Pupa. He alludes 



