STKES : NEW LAND-SHELLS FEOM CEYLON. 71 



microscopice pluribus lineis spiralibus sculpti, ultimus ad peripiieriam 

 carinattis, basi sub-convexus, radiatim striatus, nitidulus ; sutura 

 subimpressa, apertura ovato-lunata ; peristoma simplex, rectum, 

 margiiie columellari ad perforationem leviter reflexum. Alt. 2'5, 

 diam.. max. 2'5mm. 



Hah. — Uda Pussellawa, Ceylon (H. B. Preston). 



The sculpture is not visible until the periostracum has been rubbed 

 ofP, and at first I was under the impression that the species was 

 smooth. 



21. EuPLECTA PE^EMiNENs, n.sp. PI. V, Figs. 5, 6. 



Testa subperforata, depresso-conoidea, tenuiuscula, superne confertim 

 costulata, lineis impressis spiralibus regulariter granulata, corneo- 

 brunnea, versus apicem lineis spiralibus validioribus quam costulis 

 Bculpta ; spira concava, apice elevato, acuto ; anfr. 6-6-|-, plano- 

 convexi, mediocriter accrescentes, ultimus non descendens, acute 

 carinatus, basi convexus, radiatim striatulus, nitidus ; apertura 

 obliqua, angulato - lunaris ; peristoma simplex, rectum, margin© 

 columellari ad perforationem subreflexo. Alt. 15, diam. max. 

 28-5 mm. 



Sal. — "Watawala, Ceylon (Collett). 



This is the Helix acuducta, Benson, of Mr. Collett, in his interesting 

 paper ' on the land-shells of Ambagamuwa. From an examination 

 of Benson's specimen, preserved at Cambridge, which agrees fairly 

 well with his original description, I arrive at the following differences : 

 H. acuducta is slightly lighter in colour, does not possess the drawn-out 

 apex, the whorls do not increase so rapidly, the sculpture is not so 

 strong, the protoconch is nearly smooth, and only shows the spiral 

 lines very indistinctly. To sum up, the true H. acuducta is a shell 

 in form, etc., rather of the group of E. Isalellina, Pfr., and H. Colletti, 

 Sykes. 



The shell figured in the Conch. Ind. (pi. iv, fig. 5) is very probably 

 the present species. Another specimen, measured in a similar manner, 

 gives alt. 14'5, cliam. max. 25 mm. ; it is slightly darker, and, the 

 spiral lines being weaker, does not appear so granular : this smaller 

 shell is the one figured, the larger specimen having met with an 

 accident. 



Dr. Jousseaume in 1894^ described from Ceylon two species which 

 he called Plectopylis Eugenii and P. Lamcahensis ; he makes no 

 mention of any armature or teeth, and probably they really belong 

 to !Sitala or Ealiella; indeed, the former, judging from figures and 

 descriptions, may be Kaliella Leithiana, Godwin-Austen,^ a species 

 Dr. Jousseaume does not mention in his list. 



Mr. Collett found in Ambagamuwa typical examples of 

 P. clathratula, and also the following interesting form. 



1 Journ. Roy. As. Soc. (Ceylon Branch), vol. xv. 



2 Mem. Soc. Zool. France, vol. vii, pp. 277, 278. 

 ^ Moll. India, vol. i, p. 71, pi. xvi, fig. 6. 



