194 LAND ANT) FERSHAVATER 



long tube, tapering backward from a knob-liko swelling at the 

 generative aperture ; the vas deferens unites witli it at the end, 

 bending over just above where the retractor muscles fringe, as it 

 were, the main sheath. The vas deferens is an extremely fine thread, 

 but becomes larger as it approaches its junction with the oviduct. 



The spermatheca is very ample and lengtheued, rather sAvollen 

 towards the posterior end. In this respect it differs from that of 

 P. secessa, which is a globose sac terminating a long narrow tube. 

 Another difference may be noted in the retractor muscle of the male 

 organ : in secessa it is low down towards the generative aperture ; 

 in this species it is higher up. But it is possible, and I think even 

 more than probable, that similar fine muscle-attachments exist in 

 secessa, but in these small forms minor details of this sort are 

 difficult to see, and likely to be destroyed or rendered brittle 

 in the preservative medium. 



Under Microcystis snavis, Mr. 0. Collett writes * : — " This species 

 occurs sparingly here. The animal, when alive, gives a dark olive 

 tint to the transparent shell. This is from the dark colour of the 

 integument covering the branchial chamber and the neck-lobes. 

 Habitat among ferns and moss in shady localities," 



Philalanka ciecumsctjlpta, Sykes. 



Macrochlamys ? circumsculjyta, S3 kes, Proc. Malacol, Soc. Loud, 

 vol. ii. no. 5, p. 235, July 1897, pi, xvi, figs, 3, 4 ; vol. iii. no. 2, 

 p. 65 (1898). 



Original description : — '■'■ Testa perforata, convexo-depressa, nitida, 

 cereo-hyidina ; spira hreviter conoidea, apice ohtusa ; sutura im- 

 pressa ; anfr. 5, convexi, arete convolati, obsolete spiraliter lirati, 

 ultimus non descendens, hasi infatus ; apertura liinaris ; peristoma 

 rectum, aciitum, margine columeUari ad perforationem dilatato, sidi- 

 rejlexo. 



" Diam. max. 5, min. 4*7 mm. ; alt. 2 mm, 



'■^ Hah. Watawala, Ceylon {Collett). 



"This species is nearly related to the Helix thwaitesi of Pfeiffer 

 (which is also obsoletely spirally lirate), but may be at once distin- 

 guished by the fact that its breadth is greater in proportion to the 

 number of whorls. The umbilicus is also slightly smaller in the 

 present species, the spire is not so much raised in proportion, and the 

 nucleus is larger. The sculpture is stronger than in Helix thwaitesi, 

 and a few of the stronger lines of growth intersect the revolving 

 lirje, thus giving the shell a decussated appearance under a lens." 



In the specimen preserved in spirit which I dissected there were 

 five distinct lirate lines on the whorl, the three next to the suttire 

 being the strongest. The specimen was a very fine one, measuring 

 5*75 mill, major diam., 5 minor diam. 



The mantle-zone and covering of the visceral sac is quite black, 

 with a chocolate tint. There are no shell-lobes. The right dorsal 



* Journ. R. Asiiit. Soc. Ceylon Brancli, vol xv. (1897). 



