246 The land and freshwater shells of India. [No. 4. 



Ctclostomid^e. 

 Pterocyclos. Benson. 



1.* P. pullatus, B. — Akowtong (on the Irrawaddi R.) Not un- 

 common. 



2.* P. cetra, B. — Maulmein and Phaiethan (on the Tenasserim 

 R.) Not common. 



Cyclophorus. Montfort. 



3. C. aurantiacus, Schum. — Tenasserim valley, not common. 



4.* C. Theobaldianus, B. — Tenasserim valley, Maulmein, Thaiet- 

 mio. This shell is no where common. In the Tenasserim valley 

 it equals C. aurantiacus in size, but is easily distinguished by its 

 more depressed form, colourless peristome, and nexuous striation. 

 It has the greatest range of any Cyclostomatous shell of the provinces. 



5.* C. Haughtoni, mihi. — n. s. Testa, simili C. aurantiaco solida 

 nitidiuscula ; carinata, superne saturate castanea ; in decorticatis 

 speciminibus, spira lineis albidis ziczac variegata. Carina, catenata, 

 alternate albida et castanea. Periomphalo albido, fasciis nonnullis 

 castaneis spiralibus lineato. Peristomate vix pallidissime ochraceo, 

 ore interiori csBrulescente — Maulmein. 



Size — ! — •* > diameter in inches. This shell I have much 

 1.35 Minor J 



pleasure in naming after Capt. Haughton, to whom I am indebted 



for some fine shells. It occurs abundantly at the " farm caves," and 



is at once distinguished from all other Tenasserim Cyclophori, by 



its parti-coloured funiculate keel, which is not the result of abrasion, 



but is best seen in specimens covered by the epidermis. 



6. C. expansus, Pfr. — Tenasserim valley. Not rare. This 



.... 1.70 0.80 



shell varies much in size, Irom to 



1.26 0.65. 



7.* C. affinis, mihi. — n. s. Testa, subgloboso-turbinata, umbili- 



cata, solidiuscula, castaneo-marmorata, baud nitida, vix carinata ; 



peristomate reflexo, forti, expansiusculo-distorto, pallidissime flaves- 



1.60 1.40 

 cente, intus cserulescente r— — - to ^— r^- Maulmein. 



This shell has no very marked character, unless a distortion in 

 the peristome, one-third from its sutural margin, should prove con- 



