98 LAND AND FRESHWATER 



type species of the genus. Its size promised to give results of value, 

 and these I have now the pleasure of publishing, while by a greater 

 eulargement of anatomical detail the generative organs are better 

 shown than in those of the same species given by Semper. He 

 depicts the genitalia unravelled and extended in a way they are 

 not seen in nature, and it is this natural position, bound and 

 confined by strong muscular bands into the space it has to fill, 

 "which gives this genus its distinctive character when compared 

 closely with the anatomy of other genera. This examination has 

 rather led me to doubt whether any near relationship will be found 

 with species like E.'l climacterica and E.'l viduaoi the N.E. frontier*. 

 I would here, in support of this view, point out how very different 

 is the sculpture of these last when examined under a high power. 

 In siibopaca the transverse sculpture is produced by undulations of 

 the shell-growth itself, and in the Ceylon forms (and it is very 

 characteristic of many) the furrows and ridges pass into a decussate 

 surface (Plate LXXXVI. fig. 7), the latter breaking up into papillate 

 eminences, sometimes distant, more often close like pin-points. I 

 cannot recall any shell with exactly this kind of sculpture on the 

 Eastern Frontier, but several are found in Southern India. 



I should much like to obtain Scraper's second species, E. lat/ardi, 

 which is evidently not quite the same animal as E. snhopaca. 



EuPLEO'XA PARTITA, PfeifFer. (Plate LXXXVII. figs. 1-1 e.) 



Helix partita, Pfeiflfer, P. Z. S. 1853, p. 125 ; id.Mon. Hel. vol.iv. 

 p. 55 ; Keeve, Conch. Icon. pi. clxxxviii. fig. 1311 {H. subopaca, 

 pi. clxxxvii. tig. 1302) ; Hanley, Conch. Ind. p. 36, pi. Ixxxv. figs. 5, 6. 



MacrocMamys (sec. X) piartita, Theob. Supp. Cat. p. 18. 



Nanina partita, Nevill, Hand-list, p. 28, =suhopaca. Reeve. 



Macrochlamys partita, Clessin, Nomen. Helic. 1881, p. 44, 

 =-suhopaca. 



= H. marcida, Bs. ? non Shuttl. 



Nanina partita, Tryon, Man. Conch. 1886, vol. ii. pi. xxxii. 

 figs. 25, 26 ; suhopaca, fig. 27. 



Original description [ = 11. marcida, Bens.? non Shuttl.): — 

 " H. testa perforata, convexo-depressa, solidula, siiperne confertissime 

 et incequaliter suharcuato-costulata, sericina,fulvo-cornea; spira mar/is 

 minusve elevata, vertice subtili, proniinulo ; sutura hvi ; anfractibus 

 5|, convexiusculis, sensim accrescentihus, idtimo vix latiore, non 

 descendente, basi lawitiscido, suplanidato ; apertura parum obliqua, 

 lunari ; peristomate simplice, recto, marginibus vix convergentibus, 

 columellari declivi, ad perforationem subincrassato, rejlexiusculo. 



" Diam. maj. 13, min. 11|, alt. 7 mill. 



" /3. major ienuior, ptallide cornea. 



" Diam. maj. 15, min. 13, alt. 7| mill. 



* Since writing this, vidua has come to band, and is described further on in 

 this Part. 



