430 On the Anatomj/ r/ P.iliile.striiia jeiikiusi. 



ill the same tubules as ripening oocytes and also in the lining 

 e|.itlielia of such tuhul-^s (PI. XV. (igs. 7 A & B). 



Tlie oviduct, which passes down the columella area in 

 company with the genital artery, is exceedingly slender and 

 usually thin-walled. At its distal end it becomes rather con- 

 voluted and thicker. It opens into the vagina very close to 

 and probably in association with the spermatheca. The latter 

 is an organ corresponding in shape and position with the 

 spermatheca of normal female gastropods, and there can be 

 little doubt that it represents that organ. In the present 

 instance, of course, it is fnnctionless. The persistence of 

 such an organ in a parthenogenetic female is very interesting, 

 and not without importance in relation to the general question 

 of parthenogenesis. A spermatheca is found in a few other 

 Taiiiioglossa, e. g., Cyclostoma (4) and Paladina (3). In otiier 

 genera usually considered close to Paludestrina there isnoacces- 

 sory organ in the female genital complex ; but there appears to 

 be some evidence for its presence in P. ulvce (see below). 



The albumen-ghind is a large organ readily observable in 

 the living animal lying at about the junction between the 

 fifth and sixth whorls. It opens into tlie brood-pouch by a 

 vertical slit-like aperture adjacent to the commencement of 

 the vagina. 



The vagina is very difficult to locate exactly, owing to 

 contraction ; it appears to be a tube passing forwards beneath 

 the brood-pouch on the rigiit-hand side, and opening into the 

 mantle-cavity near the anus. The communication between 

 the vagina and biood-])ouch would appear to be a fairly wide 

 aperture rather anterior to the openings of the albumen- 

 gland and oviduct (PI. XV. fig. 8). 



The brood-pouch is a very capacious cavity when fully 

 extended. It is excavated in the pallial integument of the 

 riglit-h;\nd side. On the left it is bounded by the rectum. 

 AVhcn funclioiial it occupies the whole right-hand side of the 

 last whorl and almost reaches the penultimate whorl. In 

 this eondition it is cajiablc of holding wrll over forty young. 



Lthmann (6) has described the male aiul female genitalia of 

 ]/. hailhica { = P' ulvd), but neither his description nor his 

 illiisirations are very satisfactory. If his account is to be 

 followed, the brood-pi>uch lea Is on into the vagina, which is 

 not the coudilion seen in jen/cinsi. On the other hand, he 

 .says : " (die Scheide) . . . von welclier eiii kurzer Blasensliel 

 mil ruiiducher Blase ausijeht" which seems to agree with the 

 spennatheca described above for jeukinni. lie also ligures 

 and describes an apparently distinct and well-marked 

 alUumeii-glaiid. 



It should be pointed out that among other Ta'nioglossa 



