•42 TROCEEDINGS OF THE BIALACOLOGICAL SOCIETY. 



Docoglossa. 



i. Style present in various forms ; Pelseneer/** The only case 

 I am acquainted with is that of Patella (Gibson, Trans. Roy. Soc. 

 Edinburgh, xxxii, 1885), to which Professor Pelseneer has kindly 

 drawn my attention. I have been unable to discover other cases in 

 the fairly copious literature of this group. 



Rki2}idoglossa. 



ii. Style present in Fissurella ; Haller ° (1888). There is apparently 

 no special sac in this form, the style being pyloric in origin and 

 IDOsition. 



iii. (?) Style present in Trochus turritus (probably = T. matoni, 

 Peyr.) ; Collier (1829). There is neither style nor sac recorded by 

 Haller " (1894) and Randies (1905) in their more exhaustive 

 examination based upon several species, and though this case has 

 figured in several textbooks, I am inclined to think some other form 

 is indicated, as may well be the case in such an early writer as Collier. 



TcBnioglossa. 



iv. A coecum more or less pyloric in position present in Ampullaria ; 

 Bouvier.^ No style is recorded, and Bouvier does not discuss the 

 possibility of this coecum being a style-sac. But from its position 

 it would seem likely to have this function. 



V. A style present in the " conoid " part of the intestine (i.e. 

 pylorus) in Cyclostoma ; Garnault.'' 



vi. A style present in Lithoglyphas ; Von Ihering." It is found 

 " im magen " ; but no further details are given. 



vii. A style present in Bithynia ; Moquin Tandon." It is found 

 "dans I'estomac", and no further details are given. But 

 the figure of B. tentaculata given by Simroth seems to show 

 a definite sac. 



viii. A sac present in Rissoa; Simroth. ^^ No style has been 

 recorded as far as I can find, but the figure given by Simroth seems 

 to show a definite sac. 



ix. A style and sac present in Paludestrina, Robson ^'^ (1920- 

 22). 



X. A style and sac present in Hypsohia, Robson^® (1921). 

 The sac is in communication with the pylorus by means of a narrow 

 slit in ix and x. It is impossible to say whether such a connexion 

 occurs in vii and viii, as only the surface anatomy is figured. 



xi. A style and sac completely (?), separated from the pylorus in 

 Bythinella dunheri ; Bregenzer.^ 



xii. A style and sac found completely separated from pylorus 

 in Adeorhis; Woodward 21 (1899), Turritella; Randies " (1902), 

 Typhobia, Sjyekia, Tanganyicia, Nassopsis, Paramelania, Chytra, 

 Limnotrochus, Bythoceras ; (Moore,^^ 1898-9, Disby ^), Pterocera 

 (Huxley,i° Woodward,^! 1893). 



I have been unable to find any satisfactory references to the 



