272 PEOCEEDINOS OP THE MALACOLOGICAL SOCIETY. 



largely lined by glandular cells containing- a granular secretion. The 

 flagellum, which Lehmann describes and figures as arising. from the 

 base of the j)enis in this species/ seems to be absent. 



The genital atrium and the free oviduct are not quite so short as 

 they are in most species of Vertigo. The glandular part of the oviduct 

 is larger than in V. moulinsiana, and the gland-cells lining it do not 

 contain a deeply staining secretion as in that species, but are less 

 unlike those lining the spermoviduct behind it. The part of the 

 darkly pigmented hermaphrodite duct that serves as a vesicula 

 seminalis is more swollen than in the last species. The hermaphrodite 

 gland, prostate gland, spermoviduct, and vagina are similar to those 

 of F. moulinsiana ; and so are the receptaculum seminis and its 

 duct, the receptacular duct being very much longer than that shown 

 in Lehmann' s figure. 



Vertigo suhstriata (Jeffreys). 



Five specimens collected by Mr. Charles Oldham at Dolgelly, 

 Merionethshire, in October, 1922. — The penis is entirely absent in all 

 the specimens. A rather long vas deferens is present near the oviduct* 

 but it appears to end blindly. This species resembles the last in its 

 hermaphrodite gland, spermoviduct, and glandular oviduct ; but 

 the non-glandular free oviduct is very short, and the swelling of the 

 hermaphrodite duct that serves as a vesicula seminalis seems to be 

 much smaller. 



Vertigo pygm ma (Drap . ) . 



Five specimens collected by Dr. Boycott at Branscombe, South 

 Devon, in August, 1922. — Male organs are present in all the specimens. 

 As in V . antivertigo, the vas deferens is remarkably long, with the 

 last part of it slightly broader than the rest, forming an incipient 

 epiphallus. The penis is very long, and its walls contain numerous 

 gland-cells. No appendix or flagellum was found. Lehmann's 

 figure of the male organs of this species ^ seems to be more accurate 

 than that of Moquin-Tandon,* the transition from the penis to the 

 epiphallus or vas deferens being abrupt rather than gradual in all 

 the species of Vertigo that I have been able to examine. 



The genital atrium is very short ; the free oviduct is also short, 

 and the glandular part of the oviduct is slightly smaller than in 

 the last two species. The swelling of the hermaphrodite duct that 

 forms the vesicula seminalis is large. The hermaphrodite gland, 

 prostate, spermoviduct, and vagina resemble those of V . moulinsiana 

 and antivertigo ; and, as in these species, the receptaculum seminis 

 is situated on the outer side of the posterior end of the spermoviduct, 

 and therefore has a very long duct, far longer than is shown in the 

 figures of Moquin-Tandon and Lehmann. 



1 Die lebenden Schnecken u. Muscheln der Umgegend Stettins u. Pommern, 

 1873, p. 150, pi. xiv, fig. 52. 



2 Op. cit., pi. xiv, fig. 53. 



» Hist. Nat. Moll. France, Atlas, 1856, pi. xxviii, fig. 42. 



