CHLOR.KA. 215 



Shell imperforate, varying from depressed-globose to lens shaped, 

 generally solid ; whorls 4-5, the last descending in front or not; lip 

 decidedly reflexed, at least below. Entire surface showing under 

 the lens excessively fine close spiral lines; lacking /lydrophnnons 

 marking*. Type ('. siren, pi. 55, figs. 15, 16, 17. 



Foot, jaw and radnla (pi. 54, fig. 3, benguetensift) as in Helico- 

 styla. 



Genital system (pi. 54, figs. 2, 4, benyuetemis) ; penis as in Heli- 

 costyla, without flagellum (benguetensis, liugeli), or having a very 

 short one (sirena). Dart sack oval, containing a long lance-shaped 

 dart (pi. 54, fig. 4, benguetensis^). Mucus gland single, lengthened, 

 composed of irregularly grouped large follicles. Duct of sperma- 

 theca moderately long. 



Distribution: Luzon, Marinduque, Mindoro, Cebu, Tablas, Min- 

 danao, Sibuyan, Luban and Guimaras, Philippines; living upon 

 trees. 



This group is more allied to Eulota than to Helicostyla in the 

 soft anatomy and dart ; but the species have assumed the arboreal 

 habits and bright coloring of the latter genus. 



Group of C. fibula. 



C. fibula Brod., vii, 94. C. amoena Pfr., vii, 98. 



C. hanleyi Pfr., vii, 95. C. sirena Beck, vii, 98. 

 v. hugeli Pfr. v. cebuana Mlldff. 



bifasciata Lea. v. guimarasensis Pils. 



C. benguetensis Semp., vii, 96. C. pelewana Mouss., vii, 99. 



C. geotrochus Mlldff., vii, 97. C. gmeliniana Pfr., vii, 100. 



C. antonii Semp., vii, 97. C. hennigiana Mlldff., Nachr., '93, 



173. 



Group of C. dryope. 



C. dryope Brod., vii, 100. C. coerulea Mlldff., vii, 101. 



prasina Koch. C. cristatella Mlldff, Nachr., '93, 



173. 



Group of C. paradoxa. 



C. paradoxa Pfr., vii, 102. C. constricta Pfr., vii. 103. 



/. immaculata Pils. restricta Pfr. 



C. undina Pfr., vii, 102. xtenopsi* Moq. 



