2 lirDEOC'ENID.i:. 



1. Hydrocena (Georissa) saritta {Bensoji). 



Hydrocena {Georissa) saritta (Benson), A. M. N. H. ser. 2, viii, 1851, 

 p. 188 (as Cyclostoma) ; Pfeiffer, Mon. Pneimi. i, p. 314 (as L'yclo- 

 stoma) ; H. & T., C. I. pi. 117, fig. 2 (as Hydrocana). 



Original description: — Testa subiniperforata, ovato-coniea, liris 

 spiralibus crebris, sulcis angustis divisis, rnunita, ferrugineo-albida, 

 apice rubente, sutura bene impressa, apice obtuso ; anfractibus 4 

 vakle couvexis; apertura vix obliqua, ovata, ^ ioagitudinis iequante, 

 peristomate ac-uto, expansiiisculo, niarginibus disjiinctis, cokiniel- 

 ]ari superne angulato, paviete calloso. 



Alt. 2, diam. 1*25 nin). 



JIah. Chei-ra Poonjee, Garo Hills. 



2. Hydrocena (Georissa) liratula, StoUczl-a. 



Hydrocena (Georissa) liratula, Stoliczka, J. A. S. B. xl, 1871, pt. 2, 

 p. 157, pi. 0, tig. tJ. 



Orif/inal description : — Testa globoso-conica, solida, imperforata, 

 cariieo-luteola; anfractibus 3-3|, convexis, siitura profunda sim- 

 ])lici junctis, primo apicem subobtusum foruiante mammillato, 

 lajvigato, hiteolo vel rubeseente, cseteris supra (infra suturani) 

 panlulum depressiusculis, spiraliter liratis, liris acutis, simplicibus 

 fere aequidistantibus, in anf. penultimo 6-7, in ultimo 9-10, basi 

 c-onvexa, centraliter minute multistriata ; apertura semilunari, 

 altitudine fere spiram sequante, baud dilatata ; labro simpliei, 

 furvato, intus striate, labio incrassato, albido, adiiato, intus recti - 

 usc-ulo, Isevi. Operculum testaceum, tenue, diaphanum, latiuscule 

 semilunare (nucleo excentrico), striis incrementi rugulosis vestitum, 

 intus ad nucleum appendiee tenui, longo, lateraliter sub marginem 

 (•olumellarem projiciente, instructum. 



Alt. 2-2, alt. ult. anf. ad aperturam fere 1, diam. maj. I'S, diam. 

 min. 15 mm. 



Aperture : diam '7 ram. 



Jiab. Dainotba, near Mouhnein. 



Animal sordide rubeseente albiduni, rostro lato, nigricante ten- 

 taculis brevissiuiis, vix projicientibus, latis, medio fere contlu- 

 entibus, oculos parvos supra, ad basin et paulo lateraliter sites, 

 gerentibus ; pede breve, subovato pallido. 



" It is mostly allied to the Ivhasi bill species G, saritta, 



Bens., but is more globose and a little more numerously spirally 

 ribbed " 



3. Hydrocena (Georissa) illex (Benson). 



Hydrocena (Georissa) illex (Benson), A. M. N. 11. ser. 2, xvii, 185G, 

 p. 231 (as Hydrocena) ; Pfeilfer, Men. Pneuni. ii, p. Itil (as Hy- 

 drocmia) ; II. & T., C. I. pi. 117, fig. 4 (as Hydroccena). 



Original description : — Testa vix perforata, ovato-acuta, miuutis- 

 slme striata, spiraliter confertira tenuisulcata, succinea, trans- 



