278 FRANK E. BEDDARD. 



rig. 19. Lougitudiual section tlirough a portion of penis, v. d. Vas 

 deferens, with its external orifice. £1. Principal longitudinal blood- 

 vessel, ft. Nephridia. Sv. Sucker, with penial seta protruding. 



Fig. 20. Seta : a, less highly magnified ; b, more highly magnified, to 

 show sculpturing at the tip. 



Fig. 21. Penial setae, a. Seta from below ; b, e, in profile, d. Extremity, 

 more highly magnified in profile, e. The same from beneath. 



Fig. 22. Epidermis (e.) and subjacent glandular cells (jl.) of penis ; the 

 ducts of the latter are seen to have pushed their way between the 

 epidermic cells. 



Figs. 23— 26.— Alvania Millsoni. 



Fig. 23. Ventral view of genital segments. ^. Male pore. p. Penial 

 processes. The clitellar segments are indicated by roman numerals. 



Fig. 24. Another specimen, in which the penial processes are not 

 developed. 



Fig. 25. A portion of one of the ventral calciferous pouches, e. Lumen 

 of gland-tubes. G. Cells of peritoneum (?) lying between them. BL 

 Blood-capillaries. 



Fig. 26. The female reproductive apparatus of one side. $ . Oviducal 

 pore. 0. d. Oviduct, c. Caecum of oviduct. R. o. Receptaculum 

 ovorum. b. Sac crossing over intestine and fusing with that of 

 opposite side. Sft. Sperraatothecal sac. Sp. or. Its orifice, o. s. Sac 

 surrounding ovary, partially cut away to show ovary lying within it. 



