556 O LI GOGH A ETA 



EISEN in his species; this latter fact leads me to doubt the justice of placing this 

 species near to K. spegazzinii, or even perhaps in the same genus ; but until further 

 details are forthcoming it is useless to speculate as to its position in the system. 



(2) Kerria halophila, BEDDABD. 

 K. halophila, BEDDARD, P. Z. S., 1892, p. 355. 



Definition. Length, 25-50 mm. ; breadth, i mm. Clitellum, XIV-XIX. Spermiducal gland- 

 pores behind or in front of the ventral setae of segments XVII and XIX ; the sperm- 

 duct-pores are just to the outside of the same setae of segment XVIII. Gizzard in 

 VII. Septa separating segments V/IX thickened. The nephridia of the posterior 

 segments are invested by a thick peritoneal coating. Hab. Upper reaches of Pilcomayo 

 river, in very saline water. 



(3) Kerria macdonaldi, EISEN. 



K. McDonald!, EISEN, Proc. Calif. Acad. (2), iii, 1892, p. 294. 



Definition. Length, ' one inch by one line ' in diameter. Clitellum, XIV-XX. Male pores 



just to outside of outer seta of ventral pair. First septum divides segments IV/V ; 



next four are thickened. No gizzard; intestine begins in XII. Septal glands in 



V-VIII. Spermathecae in Till, IX, ivith trifid diverticnlum, opening by outer setae. 



Hab. Near San Jose del Cabo, California. 



This species is dealt with in a very complete fashion by EtSEN ; his paper upon 

 this and the following species being fully illustrated. Its principal difference from 

 K. halophila is, in the fact, that there are two pairs of spermathecae with diverticula ; 

 of these, however, EISEN states that they are sometimes absent and occasionally 

 reduced to a single lobe ; he mentions, as a noteworthy point, that the sperm was 

 always found in the pouch itself and not in the diverticula a circumstance which 

 does not fall in with what has been observed in other worms whose spermathecae 

 possess diverticula. Close to the opening of the spermiducal pores are a bundle of 

 delicate leaf-like processes of the integument. There are two pairs of sperm-sacs 

 situated in segments x, xi ; in one individual another in xii was to be seen. Though 

 this species agrees with the last in the fact that it has only a single pair of funnels, 

 one individual had two pairs. The nephridia appear to commence in segment iv; 

 those anterior to segment ix are smaller ; those of ix larger ; those of the two 

 following segments again small ; the posterior glands are large and closely invested 

 with large peritoneal cells. The setae of this species are figured and described as 



