544 MR. F. E. BEDDARD ON THE [JuilC '2'.^, 



possessed of three sharp, slender, backwardly-cuived denticles, with 

 a base forming a broadly expanded plate divided at its posterior 

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

 existing species, beneath the succeeding tooth, thereby gaming 

 additio"ial 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 

 o'ave the figure with a short notice, without description or appending 

 to it any dtstinctive name. There can be no hesitation therefore m 

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

 inappropriate to a|)pend the name of Mr. Lawley and distinguish it 

 specifically, Chlamydoselachus lawleyi. • i i ■ 



Tiie 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 ilr. G-. A. 

 Boulenger for the opportunity of comparing them with the teeth of 

 the recent Chlamydoselachus in the Eritish 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. 

 [Received June 23, 1887.] 

 IV. Description o/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. 



