296 W. B. BENHAM. 



Family V. — EuDRiLiDyE. 



Fig. 13. — Eudrilus. a. Genital system. Modified from 



Beddard's figure of E. sylvicola in ' Proc. Zool. Soc./ 1887, 



p. 381, in accordance with his subsequent descriptions and 



figures of the female apparatus, which are peculiarly arranged. 



It will be seen that the ovary (o^) in Somite xiii is enclosed in a sac, the 

 neck of which communicates with the true oviduct (OD.) ; into the latter also 

 open an albumen-gland (gl.), a large spermatheca (sp.), and the ovisac (o.-),' 

 which functions also as a second ovary, and lies in Somite xiv. pko. is the 

 prostate, into which the sperm-ducts open about halfway along its length. 

 X. is one of two glands communicating with B.C., the bursa copuiatrix, which 

 contains a chitinous penis : the bursa opens externally at p. in xvii, a dotted 

 ring- indicating the male pore. b. Alimentary system. Modified from 

 Perrier's figure of E. decipiens in ' Nouv. Arch. Mus. d'Hist. Nat.,' viii, 

 1872, pi. ii, fig. 2G, in accordance with Horst's more recent description in 

 ' Notes from the Leyden Museum,' ix. G. The gizzard, ca. Calciferous 

 diverticula. Commencement of the sacculated intestine in Somite xv. The 

 nephridia are original ; they present no caecum, but the duct is continuous 

 with the tubule as in Lumbricus. c. External view of a normal somite of 

 E. decipiens, showing (a) setae and nephridiopores ; (b) Somite xvii of the 

 same species, showing the male pores — as black oval dots — occupying the 

 position of the inner couples of setae, which are absent ; (c) is a normal 

 somite of E. sylvicola, in which the nephridiopores are in line with the 

 inner couple of setae, instead of with the outer couple, as in other species. 

 Distribution : South America and New Caledonia. 



Fig. 14. — Teleudrilus. a. Genital system. Notice the 

 peculiar recurved ciliated rosettes ; the median position of the 

 male pore in Somite xix (represented as a dotted semicircle p.) 

 and sperraathecal pore in Somite xvii is peculiar. 



The female organs present some difference from the typical arrangement, 

 analogous to that in Eudrilus in that there is a connection between the 

 oviduct and spermatheca, but a less direct communication in that genus. 

 0. Ovary. OD. Oviduct, os. Ovisac.^ sr. Spermatheca. B.C. Bursa copu- 

 iatrix, opening externally at p in xix. It is in communication with the sperm- 

 ducts, prostates (pko.), and a sac (s.), probably glandular, b. Alimentary 

 system. After Rosa's figures of T. raggazii in 'Ann. ^Mus. Civ. d. Stor. 

 Nat. di Genova,' vi, 1888, pi. ix. G. Gizzard, ca. Calciferous diverticula, 

 s. The commencement of sacculated intestine, c. represents the exterior of 

 Somites xviii, xix, and xx, showing setse, nephridiopores, and median male 

 pore in Somite xix. 



Distribution : Scioa, Africa. 



Fig. 15. — Pontodrilus. a. Genital system, pro. Pros- 

 tate, sp. Spermatheca. b. Alimentary system. Note absence 

 of gizzard, s. Sacculated but non-typhlosolar intestine. Note: 

 the nephridia do not commence till Somite xv. c. shows 

 the exterior of Somites xvi, xvii, and xviii, with setse, 

 nephridiopores, and male pores. After Perrier's figures for 

 P. marionis in 'Arch, de Zool. Exper. et Gen.,' ix, 1881. 



Distribution : Europe (France). 



' The index line does not go quite far enough ; it should extend to the 

 small round sac at the end of the tortuous tube 

 ^ This is very feebly indicated in the diagrams. 

 8 The index line should extend to the round dotted area. 



