224 On some Earthworms from India. 
the body of the spermatheca is,a small appendage on either 
side; this appendage is formed of three short sacs uniting 
before their opening into the duct of the spermatheca; in 
colour they are very different from the spermatheca itself, 
being of a chalk-white, owing apparently to the thin- 
ness of the walls and to the presence of spermatozoa within ; 
the main part of the spermatheca is reniform in shape, 
the efferent duct arising from the “ hilus,” and of a yellowish 
colour. ‘The whole of this portion of the organ is covered by 
abundant blood-capillaries. Fig. 9 shows one of the sperma- 
thecee, viewed laterally, with its trifid appendage and the 
‘segmental tufts” of the segments on either side of it. 
The only other Intraclitellian genera in which prostate glands 
(so commonly found in the Postclitellian forms) exist are 
apparently Hudrilus and Pleurocheta; in the former genus 
Perrier* has described and figured two long sacs, which appear 
to represent prostates, and in Plewrochewtat they are well 
developed. In having the form of a simple coiled tube the 
prostate glands of 7ypheus are of a more primitive character 
than those of Perichwta, which are complex lobulated glands ; 
in Pontodrilus t, however, the prostate has the same rudimen- 
tary structure. 
Hab, Neighbourhood of Calcutta. 
EXPLANATION OF PLATE VIII. 
Fig.1. Typheus orientalis, from beneath. cl, clitellum; a, male gene- 
rative apertures ; b, genital papille ; sp, apertures of spermathece. 
Natural size. 
Fig. 2. Typheus orientalis, dissected. a, aggregate of segmental tufts ; 
b, specially thickened mesenteries; ¢, pharynx, between which 
and the buccal cavity lie the cerebral ganglia; d, esophagus ; 
e, gizzard; f, intestine; g, testis; 4, prostate gland; 2, penial 
sac: sp, spermathece; v, dorsal vessel, giving off six lateral 
hearts. ‘T'wice the natural size. 
Fig. 3. Perionyr M‘Intosli. m, male aperture; f, female aperture ; sp, 
orifice of spermatheca. Natural size. 
Fig. 4. Genital papilla of T'ypheus. xX 4. 
Fig. 5. Seta of Pericheta armata, X 800. 
Fig. 6. Penial seta of the same, terminal portion. x 300, 
Fig. 7. Spermatheca of the same. X 2. 
Fig. 8. Spermatheca of Perionyx M‘Intoshit. Natural size. 
Fig. 9. Spermatheca and neighbouring segmental tufts of Typheus. 
xs 
Fig. 10. Seta of the same. xX 3800. 
Figs. 11aand b. Penial sete of the same, terminal portion. x 300. 
Fg. 12. Intestinal glands of the same. x 4. 
* Perrier, Nouv. Arch. du Muséum, t. vill. p. 74, pl. ii. fig. 26 vs. 
+ Beddard, loc. cit. p. 501. 
t Perrier, Arch. de Zool. Exp. t. ix. 1881, pl. xiv. fig. 17. 
