CHLORITIS. 117 



Genus CHLORITIS Beck, 1837. 



Ckloritis BECK, Index Moll. subg. 24, p. 29. GRAY, P. Z. S. 

 1847, p. 172, type If. ungulina. v. MART., in Alb., Die Hel. 1860, 

 p. 161, type H. ungulina L. Erigone ALB., Die Hel. 1850, p. 92 

 (for discordialls Fer.). Semicornu " Klein," H. & A. ADAMS, Gen. 

 Rec. Moll, ii, p. 202, 1855. Cf. PILSBRY, Man. of Conch, vi, p. 

 242; viii, p. 270; and v. MOELLENDORFF, P. Z. S. 1891, p. 335, 

 33Q.-\-Siilcobasis Tap.-Can., Auxtrocliloritis Pils., Trichochloritis Pils. 

 and Plecteulota Mlldff. 



Shell varying from discoidal and biconcave to depressed subglo- 

 bose with convex spire ; the apical whorl flattened or sunken, and 

 showing under a lens regularly arranged granules or hair-pointy, 

 which often persist over the whole shell. Aperture lunate, the lip 

 reflexed. Type C. ungulina L., pi. 29, figs. 1, 2, 3. 



Animal (of C. porteri} with undivided sole, the edges of the foot 

 lacking a foot border ; sides irregularly granulated ; tail rounded, 

 above with an impressed longitudinal median line ; back from mantle 

 to head having a few longitudinal grooves. Mantle edge bearing a 

 small right body-lappet. 



Jaw strong and ribbed. 



Radula having the middle cusp only developed on central and 

 inner lateral teeth, the cutting points about as long as the basal 

 plates; side cusps completely absent, but represented by small cut- 

 ting points. Lateral teeth with a long, oblique, bifid mesocone and 

 a small ectocone. 



Genital system characterized by the lack of dart sack or other 

 accessory organs on the female side, the spermatheca duct rather 

 long and closely bound to the uterus. Penis without appendix, its 

 cavity containing at the apex an imperforate fleshy papilla (pi. 28, 

 fig. 2), situated beside the opening of the epiphallus ; epiphallus 

 (pi. 28, figs. 1, 2, C. porteri} long, the penis retractor inserted upon 

 it; terminating in a flagellum and vas deferens. 



Distribution, Northern Australia and Solomon Is., north to south- 

 ern China. No fossil forms are known. All of the species live 

 upon the ground, as far as known. 



The genus Chloriti* was originally proposed for flat, biconcave 

 Helices ; but modern systematists have widened the group to con- 

 tain allied forms having the spire convex. Early in 1891 the 

 writer discussed the group, fixing upon the previously unnoticed 

 character of a quincuncially granulated apex as the true generic 



