ALYC.EUS. 265 



Conch. lud. 1874, pi. 96, figs, o, G; Theobald, Cat. Shells Brit. 



India, 187o, p. 40 ; Sowerby, in Reeve, Conch. Icon, xx, 1877, 



Alycceus, pi. 2, figs. 14 «, 146 ; Xevill, Hand List, i, 1878, p. 294; 



Godwin-Austen, Land & Freshw. Moll. India, ii, 1914, p. 342, 



pi. 134, figs. 4-4 c ; large var. ibid. p. 343, pi. 133, figs. 3-3 c. 

 Alycceus {Charax) plectocheUus, Benson, op. cit. p. 177. 

 Ali/caeus (Charax) plectochihs, Kobelt & Mollendorff, Nachr. 



beats. Malak. Ges. xxx, 1898,p. 129 ; id.. Cat. Pneum. 1899, j). 49. 

 Ali/caeus {Dicharax) jj/ectoc/dlus, Kobelt, Das Tierreich, Lief. 16, 



1902, p. 375. 



Original description : — " Tt^sta aperte umbilicata, depresso-turbi- 

 iiata, confertiin stinatiila, striis iionnullis ad suturam elevatis, 

 nitente, subpellucida, riit'esceuti-albida ; spira brevi, depresso- 

 couoidea, apice obtuso, sutura impressa; aufractibus 3^ convexis, 

 ultimo rotundato, profunde constricto, tubulum mediocrem 

 gereute, strictiu'a crista aiigusta elevata, intns cavo-sulcata, peri- 

 stoma expansum simulante, ab apertura separata; apertura vix 

 obliqua, subcirculari, peristomate diiplici, margiue columellari 

 leviter inerassato-reflexo, dexti-ali vakle iucrassato-|)orrecto, fortiter 

 acutaugulatiai crispo-plicato, plicis quinque aperturam ai-ctantibus, 

 margiuibus callo prominente aiigulato juiictis. Operc. ? 



" Diam. major '2k, miuor 2, axis vix 2 mill." 



Hah. India: Euiigun Valley; Darjeeling (Blanford, Main- 

 vmring); Damsang Peak, Western Bhutan, large var. 



" The dimensious given are those of the largest of four speci- 

 mens. The strenuously vandyked plication of the incrassate edges 

 of the porrect dextral side of the peristome is a remarkable 

 feature in this minute species. It recalls the curious frill in 

 Pterocyclos hilahiaUis, Sow., but in a more exaggerated guise, not- 

 withstanding the smallness of the shell. The edges of the folds 

 are thickened and slightly reflected. Its smaller size, sculpture, 

 and wider umbilicus, and, above all, the mode of constriction, 

 prove that it is not an exaggerated form o£ crenulatus. The 

 deceptive appearance of the ridge or crest at first induced me to 

 class the shell with Diorifx; but a closer investigation of the niode 

 in which the ridge was attached to the true peristome, and a view 

 of the internal sulcus, revealed the true position of the species." 

 {Be7is07i.) 



"The operculum of this specimen [large var.] is multispiral, 

 smooth and black." {Godwin- Ansien.) 



39G. Alycaeus polygonoma, Blanford. 



Alycceus polyf/coioina, Tdauford, J. A. S. B. xxxi, 1862, p. 140 ; id., 

 op. cit. xxxiv, 1865, p. 99; Pfeiffer, Mon. Pneum. Siippl. 2, 

 1865, p. 51; Haulev & Theobald, Conch. Ind. 1874, pi. 96, 

 figs. 2, 3: Theobald, Cat. Shells Brit. India, 1876, p. 40; 

 Sowerby, in Reeve, Conch. Icon, xx, 1877, Alycceus, pi. 2, fig. 11 

 ipolyyonus) ; Xevill, Hand List, i, 1878, p. 293 ; Godwin-Austen, 

 Land & Freshw. Moll. India, ii, 1914, p. 423, pi. 141, fig. 5. 



Alycaeus {Charax) polygonoma, Kobelt »fe MciUendorif, Nachr. 

 Beats. Malak. Ges. xxx, 1898, p. 129 ; id., Cat. Pneum. 1899, p. 49. 



