154 kecokds of the austbaman museum. 



Papuina hindei, Cox. 



(PI. xxviii., figs. 7, 8, 9.) 



Cochlostyla Hindei, Cox, Proc. Linn. Soc. N. S.W. (2), ii., 1888, 

 p. 1063, pi. xxi., figs. 1, 2. 



Ilelicostyla hindei, Pilsbry, Man. Conch., ix., 1894, p. 229. 



The most eastern point to which on assured, that is anatomical, 

 grounds, the tribe of Belogona has been traced, is Waighiou, 

 Dutch New Guinea, in the form of Helicostyla conformis, 

 Ferussac. On other and doubtful grounds this tribe is assumed 

 to occur as far east as the Solomon Islands, in Crystallopsis, Ancey. 

 With a view to deciding on more exact limits, I wrote to Madame 

 Kolbe, of Ralum, New Britain, enclosing a coloured drawing of 

 Cochlostyla hindei, and requested her to procure the animal for 

 study. Madame Kolbe, always a generous friend to this Institution, 

 kindly responded by forwarding some well preserved material. 

 The result of an examination of this is as follows : — 



Jaw (tig. 7) thin, ends rounded, saiooth, centre crossed by 

 weak ribs. 



Radula (tig. 9) of the type which Pilsbry has described for P. 

 vexillaris, with rows meeting in the centre at an acute angle, and 

 with enlarged and broadened cusps. 



Genitalia (fig. 8) without accessory organs on vagina. Tentacle 

 retracted between the branches. Penis-sac long, flattened, with- 

 out internal papilla. Retractor muscle attached to floor of lung 

 cavity. Epiphallus long, slender and twisted. Spermatophore 

 on long slender duct. 



This dissection must certainly eff'ect the transference of Coch- 

 lostyla hindei, from Helicostyla to Papuina as those genera are 

 arranged in Pilsbry's classic "Guide to the Study of Helices." On 

 this point the absence of a dart sac is conclusive and is supported 

 generally by the structure of the male organ and of the dentition. 

 Credit must be given to Brancsik, who in describing ZT. heiinburgi, 

 synonymous as Pilsbry suggests with the species before us, correctly 

 indicated its systematic position by referring it to Geotrochns. 

 I regard P. hindei as related to P. xanthochila, Pfr. 



