Mr. W. H. Benson on new Land Shells fiom Ceylon. 91 



to acceptance witli Lamarck's genus Anostoma, like which the 

 mollusk to use M. Petit's words, "arrivmg at a certain stage ot 

 Tow^K abandons in the formation of the shell the regular course 

 followed by the animals of the genus //e/ia;. 



The separation of such a singular gi'oup is, at all events, a great 

 convenience in conchological research. 



3. Streptaxis Cingalensis, nobis. 



Testa arcuatim rimato-perforata. depresso-OTata, solida, abbreviata 

 lata, obsolete costulato-striata, albido-cornea, ^^l^*"; P«];^;Xs 

 elevatiuscula, sutura crenulata, apice convexmsculo ; anfract bus 

 6 convexis, ultimo ad latus deviante, basi convexa ; apertura sub 

 triausulari 3-dentata, marginibus callo lamellam mtrautem vah- 

 dam^emittente junctis, dextro reflexo, antrorsum arcuato un^da^- 

 tato, superne profunde sinuate, columellan reflexo, ad basm um- 

 dentato ; umbiUco intus striato, Unea impressa circumscnpto. 



Diam. maior 11, minor 8, alt. 5 mill. . 



S in pago Hewagam Corle Ins.d^ Ceylon, inter nmas saxorum. 



Nearly allied to the last, but differing in the dentition of the 

 aperture, in the umbilicus, and in the less flattened form. Ihe 

 replication of the sinus at the top of the aperture simulates 

 another tooth at right angles with the laminar plat on the 

 parietes, a character observable also in S. Pen-otett, and to 

 Th ch i. Layardiana also shows a tendency. t is intermediate 

 between those two species in the dentition of the ^per nre>^* 

 wants the additional tooth which occurs at the base, withm the 

 aperture, in the first-named species, from which it is moreovei 

 much further removed in form than from S Layardiana. 



Mr. Layard has communicated the foUowmg note on the ani- 

 xnal — " Epiphragm glassy, animal yellow, with a red line on the 

 back extending up the two superior tentacles, at the tip of which 

 the eyes are sifuat^ed : all four tentacles clubbed ; when crawhng 

 the shell is carried nearly level with the back. 



The coloux-ing of the animal reminds me of the hues observable 

 in the Pup. of the Isle of France, as well as ^^ /he Indian and 

 Galle speiies, P. hicolor of Hutton It has already been e^ 

 marked by others that Streptaxis has an obvious affinity with 

 the Mauritian Pupa Pagoda in the formation of the shell. 



3. Helix ceraria, nobis. 

 Testa obtecte perforata, ^epressa, nitidula, cerea radiatim rugo^^^^ 

 striata striis spiralibus remotmscuhs decussata, luteo- uhicla, 

 versus apicem mbescente, spira convexiuscula, apice obtusato ; 

 ISactibSs 4, superne planulatis, ultimo lato, cannato, subtus 

 Suixo ; ape tura magnli, late lunata, peristomate simphci, acuto, 



