250 F. Stoliczka — Notes on Terrestrial Mollusca. [No. 3, 



shorter one, over the base ; the upper portion of the right shell 

 lobe is linguate, very narrow and long, the lower short, thick, 

 partially reflected over the lower part of the inner lip. The left 

 dorsal lobe is short and thick above, the right thinner, but larger 

 and extending over the neck. 



Semper says that the genital organs of honesta are perfectly similar 

 to those of the supposed sphndens, Hutton, mentioned on p. 246. I 

 have not been able to trace the arrow sac, but there is in full grown 

 specimens a sac connected with the genital system, which contains a 

 peculiar horny, curved, hollow organ (pi. xvii, fig. 13). The anterior 

 end is trumpet shaped, for some distance from that end the sides are 

 provided with various, branched, horny appendages and the whole 

 terminates with a sac, filled with very thin, variously twisted 

 strings, containing intermixed elliptical, transparent, solid bodies. 

 I have not been able to trace in the present species the exact posi- 

 tion of this strange organ, but one of a similar kind occurs in 

 Sesara infrendens,. and in this it is certainly an appendage of the 

 oviduct. The physiological function of the organ itself I am at 

 present unable to indicate. 



The jaw is rather narrow, smooth, with the sides slightly curved 

 outward, and with an obtuse median projection in the middle 

 of the front edge ; the general form resembles that of Microcystis. 



The radula is long, composed of about 80 transverse series of 

 teeth ; about 23 median teeth in each series being considerably 

 broader than the outer ones, which are on either side about 30 or 

 35 in number. The centre tooth is symmetrical, tricuspid, the 

 following turn outwards on each side, and the last teeth have two 

 subequal short cusps. 



The great development of the lobes of the mantle, and particu- 

 larly the form of the jaw, the inequality in the teeth and the 

 presence of the peculiar appendage in the genital system indicate 

 distinctions which may be sufficient for separating the present 

 species generically from Macroclilamys, and in this case Mr. W. 

 Ulanford's name Durgella would most probably be applicable to it. 

 This name has been proposed for Benson's Helix levicula from 

 Tenasserim, as type, and would indicate a close relation, both in the 

 form of shell and the characters of the animal, to Helicarion. Whe- 



