254 Proceedings of the Royal Physical Society. 



Genital Area. — Lying midway between the posterior groups of epimera. 

 Length, 43 mm. ; breadth at the anterior end, '23 mm., at the posterior end, 

 •47 mm. Anterior plates elongate, with interrupted inner margin, each 

 with 51-64 acetabula. Posterior plates more or less rounded, each with 

 62-75 acetabula. Acetabula pyriform. Free area, between the plates and 

 the outer margin of lips of vulva, with many fine pores. 



Male and life-history unknown. 



Distribution. — England ; found by Mr C. F. George, M.R.C.S., in the 

 parish of Manton, near Kirton in Lindsey, Lincolnshire, in 1902, and by 

 Mr C. D. Soar, F.L.S., in the Norfolk Broads in 1905. 



[Issued separately, 2Uh April 1912.) 



