MOSS & WEBB : ANATOMY OF CHLORITIS, 35 



figured by Mr. Hedley.^' The genital organs of the last 

 mentioned species — Plate VI., figures 8 & g — agree with those 

 of C. stirophora in all the particulars italicized above ; it should be 

 noted, however, that the duct of the spermatheca is " swollen 

 below" as recorded for the genus Thersites. The "talon" is 

 well shown and as Mr. Hedley's drawing does not bring out this 

 particular point and the spermatheca was broken off in his 

 specimen, new figures have been given (Plate III, figures 

 8 & 9). 



There are some features in which the two species under 

 consideration differ, not only from the description given by 

 Mr. Pilsbry for Thersites, but for the genus Chlovitis as a whole, 

 and which, perhaps, should be taken as being peculiar to the 

 section Sulcohasis. 



SULCOBASIS. CHLORITIS. 



Tail above with a median roiij of "Tail above, with an impressed 



lavge tubevcles (in C stirophora. longitudinal median line " (p. 



The foot was cut away in 117, this is italicized by Mr. 



the other species), some of Pilsbry). 



ivhich are cleft to form a 



double row, while others present 



a trilobed appearance. No sign 



of a papilla in the penis cavity " Penis cavity containing at 



whic' was found in both the apex a fleshy papilla" 



species to have the interior (p. 117). 



K'alls wrinkled as figured and 



described by Mr. Hedley * in 



C. rehsei. 



On the other hand the spiral sulcations upon which the 

 name Sulcobasis was founded are not to be seen on the undersides 

 of the specimens of C. stirophora that were examined. 



It may be taken as proved that the species stirophora is a 

 true Chloritis and that Sulcobasis has more title to be retained as 

 a separate section. 



* The Land Molluscan Fauna of British New Guinea, 2nd supplement. Proc. Linn. 

 Soc, N.S.W., Voh IX., sen 2 (June 27th, 1894), p. 384 Plate XXVL, tig. 25. 



