IGO PROCEEDINGS OP THE MALACOLOGICAL SOCIETY. 



duabus liris, unica ad peripheriam, altera basali, omata, in regione 

 timbilicari Itevi impressa ; sutura impressa ; apertura subcircularis. 

 Diam. max. 1"1, alt. 1 mm. ; spec. maj. diam. 1'5, alt. 1*2 mm. 



Hal. — Amongst moss on Eton estate, Pnnduloya, at 4,000 feet 

 (0. CoUettj. 



This species may easily be separated from the other known species 

 of Ceylon by the fact that it is smooth save for the two distinct 

 spiral lirse on the last whorl, of which only one appears on the earlier 

 whorls, and by the difference in its coloration. 



The operculum is very remarkable : seen from without it appears 

 as a ring of foliaceous laminae standing up and surrounding a deep 

 central pit. 



This species may be the Jerdonia trochlea of Hanley & Theobald,^ 

 but not that of Benson,'^ figured by PfeifEer^ from a specimen belonging 

 to H Benson. The two figures represent quite distinct species, and 

 as Pfeiffer's was taken from a Bensonian specimen, it is the more 

 likely one to be correct. 



3. Thysawota hispida, n.sp. PI. X, Pigs. 2a-c. 



Testa trochiformis, periostraco fusco, rugoso, induta, basi impressa, 

 umbilicus angustus, pervius ; apex mediocris, applanatus ; anfr. 6-6|-, 

 convexi, lira unica spiraliter sculpti, ultimus basi carinatus, lira 

 carinaque pilis longis dense notatae, apertura lata, lunaris ; peristoma 

 simplex, marginibus callo tenuissimo junctis. Diam. max. 8, alt. 5 mm. 



ir«J.— Haputale, at 4,500 feet, Ceylon (0. Collett). 



This species appears to be closely related to Thysayiota Guerini, Pfr., 

 from the Nilgherries, but differs somewhat in shape, as also in size ; 

 the single spiral thread clothed with club-shaped hairs (Pig. 2c) is 

 specially noteworthy. The basal carination is continued, and marks 

 the suture of the upper whorls. 



4. Helix biciliata, Pfr. — Practically all that we know of the 

 Helix Mciliata, Pfr., is contained in his original description;* there 

 are also the figures given by Hanley & Theobald.^ Pfeiffer records 

 the habitat as ' Ceylon,' and refers to ' coll. Skinner.' As this 

 collection passed into the hands of Miss Linter, I inquired if she 

 possessed the species : she kindly informed me that no trace of it 

 could be found in the catalogue of the collection. 



Eecently I have had from Mr. Collett two very interesting 

 specimens, in good condition, which I refer to this species. Provided 

 we assume that when Pfeiffer speaks of " carinis duabus," one may 

 be almost in the suture, they agree fairly well with his diagnosis, 

 save that on examining the base under a lens, I find palatal and 



1 Conch. Ind., pi. cxxxv, figs. .5, 6. 



- Ann. & Mag. Nat. Hist., ser. ii, vol. viii (1851), p. 189. 



3 Concli. Cab., Cyclostomacea , p. 380, pi. xlix, figs. 29, 30. 



* Proc. Zool. Soc, 1855, p. 112 (cf. Men. Helic. Viv., iv, p. 68). 



* Conch. Ind., pi. clix, figs. 1, 4. 



