136 THERSITES-PAPUINA. 



Hadra. Central and inner lateral teeth having the ecto- and ento- 

 cones completely fused with the mesocones, which attain or project 

 beyond the posterior edges of the basal-plates. Outer laterals hav- 

 side side cusps developed, the meso- and ento-cones forming a long 

 compound cusp as in Chloritis, etc. Marginal teeth (fig. 11) tricus- 

 pid, or having the ectocones bifid (figs. 11, 12 show central with two 

 adjacent laterals, 10th to 13th lateral and transition teeth, 22d, 23d 

 and 32d to 35th marginal teeth ; after Wiegrnann. PL 51, fig. 9, 

 shows a central and lateral tooth from another individual, in which 

 the ectocones are developed). In T. convieta the jaw has 7 stout 

 ribs, dentition as in solorensis (See Binney, Dent. Pulm. Moll. pi. x, 

 f. G.) 



Genitalia (pi. 51, fig. 10, T. solorensis, after a drawing by Mr. 

 A. Protz) with a short flagellum on the penis, the spermatheca-duct 

 inserted high on the vagina. No penis retractor is shown in the 

 sketch, but it is probably present; and it is likewise probable that 

 1 the penis proper terminates with the swollen portion seen at about 

 the middle of its length, and that it contains a papilla there; the 

 narrower upper part, as far as the entrance of the vas deferens, be- 

 ing an epiphallus. 



The snails of this section have a smaller, more compact and cre- 

 taceous shell than ffadra, with a different scheme of color. The 

 anatomy offers no deviation of any importance from that of Hadra 

 and Chloritis. 



(Species of N. Australian coast and adjacent islands). 



T. reinga Gray, vi, 185. T. convieta Cox, vi, 187. 



T. richardsonii E. A.Sm., vi, 185. T. plectilis Bens., vi, 188. 

 T. leptogramma Pfr., vi, 186. paleata Rve. 



T. dringi Pfr., vi, 186. T. carcharias Pfr., vi, 189. 



T. tescorum Bens., vi, 187. T. (?) torulus Fer. vi, 189. 



T. elachystoma v. Mts., vi, 187. 



(Species of So lor, Flores, and other islands N. of Timor Sea). 



T. colona v. Mts., vi, 190. T. floresiana v. Mts., pi. 27, f. 14, 15. 



T. solorensis v. Mts., vi, 190. T. supracostulata Schep., viii, 283. 



Genus PAPUINA von Martens, 1860. 



Papuina MTS., Die Hel. (2d edit.), p. 166, type H. lituus Less. 

 PILSBRY, Man. Conch., (2), vii, p. 3. Eugenia ALB. Mss. Insu- 



