ENCHYTR^EID^E 



79 



Sperm-ducts thin and very much coiled, confined to the anterior 

 part of somite XII. The funnels slender and the ciliated mouth turned 

 dorsally. In the upper part of the penial bulb the sperm-duct is thick 

 and muscular, but at the center or below the center the duct becomes 

 thin and loses its muscularity. The glandular cells ot the bulb are 

 of two kinds. One kind is confined to a thin lining of the sperm-duct 

 proper (pi. xui, fig. 3) . The other kind consists of the regular penial 

 glands which open on the surface of the penial papilla. 



Testes. The lobes of the testes are oblong pear-shaped, and 8 to 

 10 in number. In the sectioned specimens the testes were in degen- 

 eration and only one or two lobes were seen. 



Intestine is covered with a thin layer of chloragogen glands. 

 Ventral glands (pi. xin, fig. 4). There are two cellular accumu- 

 lations on the ventral ganglion, one in XIV and the other in XV. 

 They are both of the same size. Seen in cross-section they are found 

 to be many times wider than the ganglion, but do not rise much above 

 its general level. 



Nephridia. There are at least three rows of nuclei. The inner 

 duct is more densely wound at the neck near the anteseptal than in the 

 posterior part of the lobe. The figure (fig. 46) gives a general idea 

 of the windings ; the boundaries of the cells could, however, not be 

 made out. 



Lymphocytes. None of the specimens contained any lymphatic 

 cells in the anterior part of the body, the only part which was sec- 

 tioned. Nor could I find any in the dissected specimens. 



LUMBRICILLUS MERRIAMI sp. nov. 



pi. xn, fig. 5 ; text-figs. 47 and 48. 



Definition. Length about 12 mm., width .6 mm. Somites 55 to 

 62. Body transparent, the anterior somites dorsally hardly distinguish- 

 able. Prostomium blunt and rounded. Setae : laterals, 5, 4, 4, 4, 4, 

 4> 3> 3* 3 3^ 3> 4> 3> 2 > 2 i 2 > 2 ? ventrals, 4, 5, 5, 5, 5, 5, 5, 6, 6, 4, 

 > 4> 3 > 3 3> 3 3' 3- Head-pore between prostomium and I. Sexual 

 papillae small, but distinct. Clitellum XI XIV, not prominent. 

 Septal glands in IV to VII. Brain almost square or a little longer 

 than broad, posteriorly deeply emarginated, anteriorly slightly convex. 

 Spermathecae with large basal gland rosette and with the stalk pyram- 

 idally covered with glands. Apical ampulla small and conical, about 

 one-third of the whole spermatheca. Sperm-ducts only about twice 

 as long as the funnel, narrow. Funnel about three times as long as 

 wide, with small recurved collar. Penial bulb comparatively large, 



