88 EISEN 



Sperm-ducts are thin, long, and much coiled, and confined to so- 

 mite XII. The funnels are thicker than in L. santczclarce, and also 

 shorter. The penial bulb is globular. The sperm-duct enters on the 

 outer side and remains free inside the bulb for a considerable distance. 

 Only the lower fourth is covered with long and thin glands (pi. xm, 

 fig. i ) . There are also two sets of penial glands opening close to the 

 sperm-duct, but enclosed in the penial bulb. In L. santceclarce the 

 glands cover the sperm-ducts along three-fourths of their entire length 

 inside the penial bulb. 



Testes are strongly racemose and the lobes are rounded and pear- 

 shaped. The lobes are more rounded and less pointed than in L. 

 santczclarce. Each lobe is covered with its own sperm-sac. 



Ventral glands . This species possesses ventral glands attached to 

 the ventral ganglion in each one of somites XIV to XVI. The glands 

 are larger, increasing posteriorly, and extend far out into the ccelom 

 (pi. xm, fig. 2), being four to five times as long as the ganglion is 

 wide. In the posterior one of these somites the glands enclose the 

 ganglion almost completely. 



Lymphocytes. These do not exist in all specimens. Thus the 

 specimen sectioned did not contain any lymphocytes, while in a dis- 

 sected one there were many. 



Nephridia. The duct very thick and comparatively short, varies 

 considerably in the respective nephridia. There may be segregated 

 two types, one with thick duct, and one in which the duct is narrower 

 and also a little longer. 



LUMBRICILLUS FRANCISCANUS BOREALIS var. nov. 



Text-fig. 58. 



Definition. Length 15 mm., width 1.25 mm., all contracted speci- 

 mens. Somites 62. Setae sigmoid, the outer one in the ventral fascicles 

 and the inner one in the lateral fascicles much smaller than the other : 

 laterals, 4, 5, 5, 5, XIII, 3, 4, 4, 4, 3 ; ventrals, 6, 7, 7, 7, XIII, 4, 

 4, 4, 4, 3. Head-pore between prostomium and somite I. Clitellum 

 XII and XIII. Copulative papilla small. Salivary glands large, IV 

 to VI. Brain almost square, broader anteriorly; anteriorly slightly 

 emarginated, posteriorly considerably emarginated. Spermatheca with 

 a duct and an ovoid ampulla, the former surrounded along its whole 

 length with glands, broadening toward the base. Sperm-ducts nar- 

 row, confined to somite XII. Sperm-funnels broad and slightly 

 curved. Penial papilla more oblong than in the species. The lobes 

 of the testes are oblong, pear-shaped, with rounded sperm-sacs. Ven- 



