544 MR. F. K. BEDDARD ON THE [JunC 23, 



possessed of three sharp, slender, hackwardly-curved denticles, with 

 a base forming a broadly expanded plate divided at its posterior 

 extremity into a pair of prongs, whicli doubtless extended, as in the 

 existing species, beneath the succeeding tooth, thereby gaining 

 additional firmness and strength. The figures indicate a tooth twice 

 the diameter of the anterior teeth of the existing species. The 

 author knew of no living or fossil representative of the teeth, and 

 gave the figure with a short notice, without description or appending 

 to it any distinctive name. There can be no hesitation therefore in 

 associating the fossil with the existing genus, and it may not be 

 inappropriate to append the name of Mr. Lawley and distinguish it 

 specifically, Chlamydoselachus lawley i. 



The figures will be found in ' Nuovi Studi sopra ai Pesci ed altri 

 Vertebrati fossili delle colline Toscane,' di Roberto Lawley, published 

 at Florence in 1876, pi. i. figs. 1-lc. I am indebted to Mr. Gr. A. 

 Boulenger for tlie opportunity of comparing them with the teeth of 

 the recent Chlamydoselachus in the British Museum. 



6. Contributions to the Anatomy of Earthworms. — No. IV.' 

 By Frank E. Beddard, M.A., F.R.S.E., Prosector to 

 the Society, and Lecturer on Biology at Guy's HospitaL 



[Keceived June 23, 1887.] 



IV. Description ©/"Cryptodrilus fletcheri, n. sp. 



Of this species, which is a native of Queensland ^ I have studied 

 two specimens ; one of these was fully mature with a well-developed 

 clitellum, the other specimen was immature without any traces of a 

 clitellum. 



In the larger individual the clitellum occupied five segments, 

 commencing with the thirteenth and ending with the seventeenth ; 

 the glandular epithelium of the clitellum extends all round the body 

 on these segments with the exception of a ventral area on the seven- 

 teenth, corresponding to the part occupied by the ventral setse and the 

 space lying between them ; this space was occupied by an elongated 

 genital papilla, which is rather wider at the two extremities than in 

 the middle. The four succeeding segments are furnished each with 

 a similar papilla of equal size to that on the seventeenth segment and 

 of identical appearance. 



These structures closely correspond to the "dumbbell-shaped 

 areas" described by Mr. Fletcher in another species of the same 

 genus, C. rusticus ; and the evident similarity lead me at first to believe 

 that the species described here was identical with C. rusticus. I 

 shall, however, have occasion in the sequel to refer to differences 

 between the two species ; and a careful comparison of Fletcher's 

 description of C. rusticus with my specimen shows that in the 



1 Ante p. 372. 



* I obtained the specimens through the kindness of Mr. S. Prout Newcombe. 



