CHLORITIS. 119 



blending at their confines into one another. The typical forms of 

 the first two represent the more divergent and presumably modern 

 lines of differentiation. 



Section Chloritis (restricted). 



Shell with the spire sunken, flat or somewhat convex with flat 

 earlier whorls. Type C. ungulina, pi. 29, figs. 1, 2, 3. 



But two species of the typical group of Chloritis have been inves- 

 tigated anatomically, C. dinodeomorpha Tap.-Can., Ann. Mus. Civ. 

 Genov. xix, 1883, p. 168, and C. leei Cox, Hedley, Proc. Linn. Soc. 

 N. S. W. (2), vi, p. 687. They agree essentially with Austrochlo- 

 ritis, q. v. 



Jaw arcuate, having about 8 strong ribs separated by narrow 

 intervals (pi. 32, fig. 43, C. leei). Central and inner lateral teeth 

 unicuspid ; marginal teeth having a long bifid mesocone and an 

 ectocone. Genitalia lacking appendages on the female side, the 

 duct of the spermatheca long. Penis long, the retractor apparently 

 inserted at its apex ; epiphallus very long, dilated where it receives 

 the vas deferens, and ending in a flagellum (pi. 28, fig. 10, C. dino- 

 deomorpha, after Tap.-Can. ; pi. 32, fig. 42, C. leei, after Hedley). 



Distribution, New Guinea and Moluccas (typical forms) ; Solo- 

 mons, New Ireland, Louisiades and Celebes (divergent forms). 



(Group of ungulina.) 



C. ungulina Linn., vi, 243. C. biomphala Pfr., vi, 244. 



v. minor Fer. C. martensi Pfr., vi, 244. 



C. unguiculina v. Mart, vi, 244. C. cheratomorpha Tap.-Can., vi, 



[245. 



( Group of circumdata.) 



C. circumdata Fer., vi, 246. C. maforensis Tap.-Can., vi, 247. 



molli^eta Pfr., vi, 246. v. micromphalus Pils., vi, 247. 



C. lansbergiana Dohrn, vi, 247. 



(Group ofunguicula.) 



C. unguiculastra v. Mart., vi, C. ceramensis Pfr., vi, 249. 



v. buruensis Mart. [248. C. unguicula Fer., vi, 249. 



v. amboinensis Mart. yo/dii Morch. 



v. pilosa Mart. C. gruneri Pfr., vi, 250. 



C. flexuosa Pfr., vi, 249. C. exacta Pfr., vi, 250. 



