SYSTEMATIC DESCRIPTION OF SPECIES. 99 



with a wave-length of 3 . 5 to 4/z. It occurred both in 

 the peripheral blood and in the internal organs, and 

 was actively motile. 



SPIROCH^ETA PELAMYDIS. 



(Neumann, 1909.) 



These spirochaetes were found in the blood and organs 

 of Pelamys sarda. They are shorter and thicker than 

 Sp. gadi, measuring 9 to ioft in length, occasionally as 

 much as 18 to 20/1. The wave-length of the curls is i 

 to 1.9/1. Movement is active. 



SPIROCH^TA JONESII. 



(Button, Todd, and Tobey, 1906). 



These spirochaetes from the fish, Clavias angoknsis, 

 measured i8/ in length by 0.6/1 in breadth. They ap- 

 peared round at one end and pointed at the other, a fea- 

 ure which suggests transverse division. They occurred 

 both isolated and in clumps. 



SPIROCH^ETA HARTMANNI. 



(Gonder, 1908.) 



This small spirochaete was found by Gonder in the 

 intestine of Pinna squamosa and P. nobilis. It meas- 

 ures 6 to I4/* in length by i/i in breadth. It is said 

 by Gonder to multiply by longitudinal division, on the 

 strength of certain forked forms observed. It has 

 pointed ends and periplastic appendages. 



SPIROCH.ETA BUFONIS. 



(Dobell, 1908.) 



This organism was found by Dobell in the rectum 

 of the toad (Bufo vulgaris) . It resembled Sp. buccalis, 

 and measured 8 to io// by i.5/x. It -had an undulating 

 membrane. The same writer describes another form 



