PLECTOPTLIS. CAMJEXA. 149 



in figs. 78a-c, which are reproduced from the photograph kindly 

 supplied by Dr. Merrill. The following particulars are taken from 

 Dr. Bagg's notes which accompanied the photographs : " Helix 

 repercussa, Gould. Burmah. Catalogue No., 236 ; original No., 

 A 564. Major diameter, 1J inch [=28*5 millimetres]; minor 

 diameter, inch [=22 millimetres] ; altitude, -f% inch [ = 8 milli- 

 metres] ; greatest diameter of aperture, T 7 6 inch [ = 11 milli- 

 metres]." Gould states that the species was taken in the Mergui 

 Archipelago. 



Subfamily CAM^NIN^E. 



Genus CAM-SNA (Afters), Pilsbry. 



Camcena, Albers, Die Heliceen, 1850, p. 85, in part; Martens, 

 Die Heliceen, ed. 2, I860, p. 165 ; Pilsbry, Man. Conch, ser. 2, 

 vi. 1891, p. 197 ; viii, 1893, p. 265 ; ix, 1894, p. 101 ; ibid., Proc. 

 Acad. Nat. Sci. Philadelphia, 1892, p. 398 (anatomy). 



Eucochlias. Theobald in Nevill, Hand List, i, 1878, p. 81. 



TXPE, Helix cicatricosa, Miiller. 



Range. Southern China to Burma and southward. 



" Shell rather large, varying from depressed-globose or conoidal 

 to elevated and short pupiform ; dextral or sinistral, solid, yellow 

 or brown usually encircled by chestnut bands or lines. Surface 

 closely malleated or ivrinlcled all over ; whorls about 5-5|, the 

 upper ones flattened, the last subglobose or carinated ; peristome 

 expanded or reflected, its ends not converging, colurnellar margin 

 dilated over or partly over the narrow umbilicus. The columella 

 is rounded. The nuclear shell is rather large (about one-fifth the 

 diameter of the shell), consisting of 2-2| whorls, its junction 

 with the aftergrowth marked by a (generally) distinct line. The 

 young shells are acutely carinated. 



" Animal having the sole very indistinctly tripartite ; lateral 

 edges of foot with no trace of a foot-margin, sides of foot granulated 

 in irregular pattern, the tail rather long, rounded above, ivith an 

 indistinct slightly impressed longitudinal median line; anteriorly 

 there are a few indistinct longitudinal grooves from mantle to 

 head. Mantle-margin with a small triangular right body -lappet, 

 and a longer left one. 



" Jaw arcuate, strong, typically with numerous, strong, sepa- 

 rated ribs. 



" Dentition : Central and lateral teeth having the mesocones only 

 developed, the cusps large, cutting-points small. Marginal teeth 

 with a long, oblique, bifid mesocone united at the base with 

 the ectocone, which becomes bifid on the outer teeth. 



" Genitalia : Vestibule short ; penis stout, continued above in 

 an epiphallus, in which the retractor and then the vas deferens is 

 inserted, and terminating in Jlagellum ; penis corrugated within, 



