216 LAND AJJU ihESHWATEK 



mate, convex, a little inflated ; finely striated, decussated by 

 microscopic spiral lines. Last whorl not descending, slightly 

 excavated in the umbilical region. Aperture slightly oblique, 

 lunate ; peristome thin, straight, acute ; margins distant, sub- 

 parallel, the columellar margin a little reflected and nearly covering 

 the very narrow umbilical perforation. 



" Diam. maj. 7, min. 6 mm. ; alt. 4"5 mm. 



" Hah. Lu-chu Islands. 



" Type in my collection. Ten specimens. 



" This Macroclilawys is, I believe, the first recorded from the 

 Lu-chu Group." 



The animal of Hellv macropleuris has never been described ; it has 

 been placed in Kaliella by Theobald, in Microcystis ? by Geoffrey 

 Nevill, in Thysanota by Clessin. It may possibly belong to the 

 Thysanotinse, but certainly not to the two first-named genera. 



The shell is so distinctive, I think it desirable to create a genus 

 for its reception. This I name Eahida (" a son of Euddha "), and 

 include in it the species H. bascanda, Bs. ; also H. poly ideuris, 

 ^V. T. Blf., from Arakan, a sijecies very close to hascuuda of the 

 Kbasi Hills. 



Genus Rahula, nov. 



Type H. macropletirh, Bs. 



Shell elongately pyramidal or conically trochiform ; basal side 

 flat, deeply umbihcatcd, subangulate around the umbilicus ; apex 

 pointed or rounded; costulation strong, close or distant, more or 

 less absent on the aj)ical whorls. Whorls G-8, more or less carinate 

 on the keel of the last. 



Rahula macropleuris, Benson. (Plate CIII. fig. 1.) 



Hdix macropleuris, Bs. A. M. N. H. 3 859, ser. 3, vol. iii. p. 265 ; 

 Pfr. Mon. Hel. vol. v. p. 183 ; Hanley, Conch. lud. p. 37, pi. Ixxxvii. 

 fig. 10. 



Kaliella (sec. B) macropleuris, Theob. Suppl. Cat. p. 20. 



yanina (Microcystis '}) macroplcnris, Kevill, Hand-list, i. p. 42. 



Thysanota macropleuris, Clessin, !Nomen. Helic. p. 82. 



Helix macrop>leuris, Pfr. Mai. Bliitt. 1859, p. 24. no. 700 a. 



Hah. Rissom Peak, 6410 ft. 



Shell figured. 



Major diam. 3-75, alt. 4-75-5-8 mm. 



Original description: — '\Testa subaperte umbilicaia, attenuato- 

 ptyraniidata, oblique minute arcuato-striata, superiie costis remotis 

 eievatis arcuatis munita, decoriicata, albida, nitidula ; spira p)yra- 

 viidali, superne attenuata, apice papillari, 2^('i>illct Iceviori, stitura 

 carinato-maryinata ; aiifractihus f< coure.riusculis, ultimo non 

 descendente, Jiloso-carinato, suhtus jilamdato, versus aj^erturam 



