434 LAND AND FRESHWATER 



sharpness SO remarkable in A. sti/Ufer and Jiehes, hwi, is rather a 

 broad tumid space separating two narrow constrictions. The 

 sutural tube is variable in length, sometimes being nearly as sharp 

 as in A. straiif/ulafus, in other specimens as long as iu A. stylifer ; 

 the latter being the usual case, the former the exception, but both 

 occur in perfectly fresh and full-grown s])ecimens. 



"From A. sirangulalus the species is distinguished by its greater 

 size, more depressed form, more oblique aperture, by the recur- 

 vation of the peristome at its junction with the penultimate whorl, 

 t-he larger sutural tube, the greater distance of the ridge crossing 

 the constriction from the mouth, and the closer sculpture. From 

 jrrosectus and sti/Ufer the characters of the peristome, which is 

 simple in sti/li/er and expanded at the columellar margin in pro- 

 sectus, besides the smaller size of A. expatrialus ; from hehes and 

 f/emjnula the sliohtiy prominent ridge not recurved and the 

 depressed form, atford abundant grounds for distinction. A. spira- 

 cellum of Borneo is probably closely allied, but we are only 

 acquainted with that shell by its description. Judging therefrom, 

 A. expatriaUis should be distinguished by its smaller size, more 

 narrow umbilicus, greater bluntness of the ridge in the constriction, 

 and, in general, by the greater length of the sutural tube, a character 

 which, however, is evidently, from its variability in this species, of 

 less value than has hitherto been supposed. 



" The species occurred near the base of Neddoowuttom ghat, and 

 a little above the village of Goodaloor. The animal is small and 

 colourless; the body very short; the sole undivided; tail short 

 and rather pointed ; tentacles short, yellowish ; muzzle blunt, not 

 elongated." 



Wra. Elanford's shells from the typical locality are in the IS'atural 

 History Museum and now before me (No. 58.06.4.4), six in number. 

 Also two specimens (58 a) from the Shevroy Hills, both larger than 

 the typical, the largest measuring 5'5 mm. major diameter. Both 

 these have short sutural tubes, but the ridge crossing the constriction 

 varies in elevatioTi throughout. Another lot from the Shevroys is 

 No. 25.06.5.5, two specimens, both fine large shells, ridge well 

 developed, sutural tube short. 



In the Beddome Collection (No. 277.12.iv.16) there are 16 

 examples from the Shevroys, the ridge well formed and mostly the 

 same large size, 5-5 mm. 



In the same collection are examples from a new locality, the 

 Annamullies, Nos. 275 and 276, 19 and 16 respectively ; the largest 

 measures 6-0 mm. in major diameter, ridge is quite high and 

 sutural tube short in all. 



From South Canara there is a single specimen in the Blanford 

 Collection (No. 34.06.5.5), the costulation near the sutural tube 

 not quite so strong as in typical shells. 



