Two new exotic species of the genus Chordodes. 383 



interspersed among tlie tubercles of the 3rd order are small groups 

 of three or foiir tubercles eacli, wliich differ frorn their neighbors 

 nierely in their darker color aud sligthly greater size. Accordingly, in 

 these tubercles we have a tifth kind of cuticular tubercles. 



Tubercles are absent on the tip of the head. 



Form. The anterior end of the body is attenuated and some- 

 what pointed, while the tip of the head is obtusely rounded. The 

 body is cylindrical without superficial grooves, and thickest in the 

 posterior half. The extreme distal end is narrower than the part 

 immediately preceding, with a deep median groove upon the termino- 

 ventral aspect; to each side of this groove is a rounded, longitudinal 

 ridge, these ridges extending only for a short distance upon the 

 ventral surface of the body. Anterior to this groove, upon the ventral 

 surface of the body, lies the cloacal aperture, which is slightly elon- 

 gate in form. At each side of this aperture, and at a little distance 

 from it, is a longitudinal row of hairs, which are shorter and more 

 delicate than the hairs of the longest papillae (tubercles). Leaving 

 out of consideration these rows of hairs, the posterior end has the 

 shape characteristic for the males of this genus, which serves to easily 

 distinguish them from the males of the allied Gordius (cf. Janda, in : 

 Zool. Jahrb., V. 7, Syst., 1893. 



Color. Head a pale yellowish- white, and the ventral surface 

 of the body in the region of the cloacal aperture the same color. 

 Elsewhere of a yellowish-brown, thickly mottled with deep reddish- 

 brown spots of irregulär size and shape, which are easily seen with 

 the naked eye. 



This is apparently an immature individual, since spermatozoa are 

 absent in the vasa deferentia in the middle body region. 



Length 223 mm ; greatest diameter 1,25 mm. 



This species is apparently closely related to C. bouvieri of Villot, 

 but diifers from it in that the hairs of the tubercles of the Ist order 

 are much dicker and longer, and are not directed downwards (cf. the 

 figure given by Villot, in: Ann. Sc. Nat., 1887, Zool.). The hairs 

 of the largest tubercles in our new species have nearly the massive 

 form characteristic for those of C. ornatus (cf. Grenacher, in: Z. 

 wiss. Zool., 1868). 



24th May 1897, Wistar Institute 

 of Anatomy, Philadelphia, 



