Mr. E. L. Layard's Rambles in Ceylon. 307 



from a daikish horn-colour, with one or more hnes on the body- 

 whorl, to a deep tortoiseshell, with black lines. The animal is brown, 

 with a livid foot ; tentacula short. 



Another, allied to the foregoing, but larger, I have received in an 

 imperfect state from Monegahagalla, in the hilly zone 's. I wait to get 

 living examples to describe it. 



Another, nearly aUied to C. Listen, from the Mauritius, but a less 

 solid shell : diameter 4^ lines, height 4^ lines ; umbilicus closed ; 

 whorls five, rounded, smooth ; spire rather long, subacute ; peri- 

 treme white, double, the outer edge reflected ; operculum corneous, 

 retractile. The prevailing colour is a lightish ground, with dark 

 brown transverse wavy lines ; apex blackish. I have seen numerous 

 examples of a dirty white, immaculate ; the apex blackish, as in others. 

 A cousin of mine, Mr. Charles P. Layard, obtained this in great abun- 

 dance in the Saffragam district, in the Curuwitty Pass. At the same 

 time, he procured four specimens of a very curious species : diameter 

 5 lines, axis 3 lines ; spire exserted, covered with a dark brovm epi- 

 dermis, which is ribbed ; ground colour of shell hght yellowish brown, 

 marked with close-set, dark, wavy lines ; peritreme double ; opercu- 

 lum retractile '^. 



Leaving this division we enter the flattened form, of which La- 

 marck's Planorbulum is an example. This species, as far as I can 

 judge from description, without comparison of actual specimens, I 

 have received from the hilly zone. Unfortunately none that I have 

 are in good preservation ^o. 



We have also from the same locaUties a lesser species, but all I 

 have seen are faded. 



Of the curious Pupseform group of Cyclostoma, of which Benson's 

 C funiculatum is an example, we have two species, both found in the 

 same localities in the Saffragam district, which is rich in raollusca. 



The smaller species^' measures : diameter S\, length 10 lines ; it is 

 thick in the middle and tapers off towards the apex ; and the mouth, 

 which is circular and furnished vdth a deep circular sinus, communi- 

 cating with a canal running along the base of the whorls and visible 

 in all stages of growth ; the peritreme is white, broad and reflected ; 

 general colour of shell reddish brown ; the whole surface is finely 

 striated and granulated, the granulations being more visible as the 

 growth of the shell increases ; the operculum is unlike any other I 

 have seen, resembling in fact the thread of a wood-screw, varying 

 from two to three revolutions ; it is horny and retractile ; shell abun- 

 dant under moss and stones. 



The larger species ^^ measures 6 lines in diameter, 14 in length, and 

 tapers gradually to the apex ; aperture, canal and peritreme as in the 

 last species ; operculum horny, dense, and retractile to a level with 



^ C. orophilum, Bens., Annals, vol. xi. p. 106. 

 •* Those two species have not been received. 



*" C. annulatum, Pfr., which has been received, is probably the form here 

 alluded to. 

 "^' Cataulus Tkwaitesi, Pfr. 

 -^ Cataulus pyramidatus, Pfr. 



