174 BURMA, ITS PEOPLE AND PRODUCTIOXS. 



Aeiophanta tjndosa, ay. Bl. Slinn Hills, east of Ava. 



,, BLAXFOUBr, Thcol). Upper Salwccn Valley. 



,, EETROKSA, Goulcl. Teuasseiim. 

 A. saccata, Pfr. jur. 



,, Satfenia, Gould. Ti-nasserira. 



,, ater, Theob. Jlaulraain. Hills west of Toung-ngoo. 



RnrsoTA Hauohtoni, B. Aiidaraans. 



TEOcnoiiOEPHA AULoris, B. Andamans. 



,, CASTKA, B. Arakan. Pegu. Tenasserim. 



,, PKRCOMPKESSA, "W. Bl. Bliamo. 



,, SANis, B. Andamans. 



Helicaeion, FcruKsnc. 



These are mostly largo slug-like forms, v;\i\\ the shell sometimes membranous 

 or rudimentary, and only seen about after, or during heavy rain. The auiuial is too 

 largo for retraction ■within its shallow dejjressed slull. 



,, BiRMANORXiM, Phil. Mcrgui. 



,, Cheistian.e, Theob. Andamans. 



,, ciGAs, B. Eyouk-hpyoo (Novill). 



,, MAGNiFicus, God.-Aus. Momieu, Yuuan (Nevill). 



,, Pegue^jsis, Theob. Pegu. Tenasserim. 



,, EESPLENDENS, Ncv. Sawady and Bhamo. 



,, VENUSTUS, Theob. Martaban and Arakan Hills. 



Cetptosoma, Theoluld. 



Differs from Udkarimi in the animal being completely retractile -within its shell, 

 and in forming a stout epiphragm during [estivation. 



,, OVATUS, H. Bl. Pegu (small var.). 



,, PE.ESTAKS, Gould. Yuuan. Arakan. Pegu. Tenasserim. 



Hyalijiax REixnARDxr, Miirch. The Nieobars. 



,, sp. Andamans. 



LiMAX viRiiiis, Theobald. 



A beautiful little apple-green slug, found crawling on mangrove leaves {Rhizo- 

 phora). The type specimen has been lost, and its systematic jwsitiou is uncertain. 



Famili/ Helicidse. 

 No caudal mucous pore or tentacular lobe. 



VITRININiE. 

 Helicolimax Attaeanensis, Theob. Banks of the Attaran. 



This slug (-with Sesara Ataranensis) -was discovered by myself near the ])erf orated 

 hill on the Attaran, and is the sole member of its sub-family at present known in 

 Burma. A second species, Vitrinopsis nueleata, Stol., was found by Stoliczka at 

 Pinaug. 



nELICIIX.E. 

 Plectoptlis, Benson. 



This is a very well-marked gi'oup of flat closely-wound shells, the typical forms 

 of which range from tlie Naga Hills to Tenasserim. In Ceylon they are represented 

 by Von'lla, which externally resembles them, but is improvided with the curious 

 pylaic barriers, or intricate plaits, which partially close and bar the last whorl. For 

 full remarks on this interesting group, see Godwin-Austen, Proc. Zool. Soo. Lond. 

 1874, p. G08, and 187.5, p. 43. It is suggested {I.e.) that these pylaic barriers are 

 of service to the animals, by excluding insects, and so tending to promote the 

 survival of the forms thus endowed ; but these teleological arguments must bo 



