DESCRIPTIONS OF EARTHWORMS. 29 



the posterior of them only partly glandular; the prostate- 

 pores upon segments XVII and XIX, on an elevated, 

 elliptical area, connected by a groove, that on segment 

 XVIII is faintly curved towards the median line. The 

 oviducal pores separate, hardly visible, at the mesial side 

 of the ventral setae, a little more anteriorly. First dorsal 

 pore in the intersegmental groove III/IV. The sperma- 

 thecal pores in the groove between segments VII and 

 VIII , VIII and IX , in the series of the ventral setae , 

 connected by a glandular ridge. 



The penial sac contains two setae of different shape, 

 but of about the same length (0.6 mm.). The larger of 

 them is 0.014 mm. thick, slightly curved over the fourth 

 distal part of its length and furnished with several distant 

 tubercles; the other seta is much more slender, quite 

 plain , ending abruptly in a fine apex like in B. culminis 

 Mich. Each prostata consists of a rather large, linguiform 

 gland, with a knee-shaped bend in the middle, and opening 

 unto the exterior by a curved , much thinner, muscular 

 duct. Each spermatheca is a pyriform pouch separated by 

 a constricted part from the wide, globular duct, which is 

 about equal in size ; the latter bears in its middle a small 

 spherical diverticulum, furnished with a short duct. In diffe- 

 rent individuals however the shape of the spermathecae is 

 somewhat variable, sometimes it is more elongated, resem- 

 bling those of B. palmicola'). The 11th, 12th and 13th 

 septa are specially thickened. The buccal cavity is usually 

 everted ; the two gizzards lie in segment IX. There are 

 three pairs of calciferous glands in segments XV — XVII; 

 only the two anterior ones contain lime crystals. 



In the segments behind the clitellum the nephridia are 

 arranged in five rows on either side of the median line, 

 the first of them between the ventral and dorsal rows 

 of setae. 



As already stated above, our specimens most resemble 



Eisen: loc. cit. pi. XLIX, fig. 52 k and h. 



Notes from the Leyden Museum, Vol. XXI. 



