ENCHYTR^ID^ 



8 = 



5, 6, 5, o (XII), 5, 5, 5, 4, 4, 5, 4, 4, etc. ; second specimen : lateral, 



3' 3' 4^ 4i 3i 4^ 4^ 4i 4» 4? o (XII), 3^ 3^ 4^ 4» 3^ 4^ 3^ etc Clitellum 

 well marked. ^ XI, XII, and XIII. Sexual papilla small. Septal 

 glands typical. Brain almost square or slightly oblong, posteriorly 

 almost straight with a shallow emargination, the anterior arms thick. 

 Dorsal vessel rises posterior to clitellum. Spermathecas with a thick 

 apical ampulla and with a narrow duct, which is covered both at its 

 base and all along its sides with accessory glands ; the ampulla connects 

 with the intestine. Sperm-ducts narrow, coiled in XI. Sperm-funnels 

 thick and curved. Pcnial bulb oblong. Testes large, with many lobes 

 capped by comparatively large sperm -sacs. Ovaries multilobed, large t 



Figs. 53 and 54. Lumbricillus ritteri. 



Ventral glands in XIII to XVII, the individual glands being compara- 

 tively small, about four or five times as wide as the ganglion. Ne- 

 phridia with short anteseptal, posterior to which is the thick, opaque, 

 granulated neck of the main nephridial body. Color of formalin 

 specimens white, clitellum pink. 



Locality. — Farragut Bay, Alaska, June 5, 18S9, Prof. W. E. 

 Ritter. 



Characteristics. — The spermathecas , the brain, and the ventral 

 glands are all characteristic of the species. The spermathecae possess 

 glands not only at the base, but also along the muscular duct. 



Testes. — Testes large and completely fill the somites in which they 

 are situated. Consist of some twenty to twenty-five lobes each, each 



