548 



meet above the esophagus. Ovaries, oviducal funnels, oviducts, and 

 ovisacs have the usual positions and relations. No trace of sper- 

 mathecai has been found in the several series of sections carefully 

 examined for them. 



Hei.odrii.us (Bimastus) i^ongicinctus n. sp. 



Definition. — Color of antero-dorsal part of living worm, rose- 

 red. Length of extended s[)ecimens, 65-92 mm. Maximum diameter, 

 3.5 mm. at the clitellum. Somites, 98-122. Prostomium epilobic, 

 j/2-/<?. Set?e closely paired; aa: ah: he: ed: dd = 10 : i : y]^. : j4 : 2,0. 

 First dorsal pore V/VI. Clitellum, XXIII-XXXII or XXXIII ( = 

 10 or II somites) ; incomplete ventrally. Tubercula pubertatis lack- 

 ing. Spermiducal pores on XV conspicuous, with surrounding glandu- 

 lar areas encroaching slightly on XVI. Septa VI/VII and XIV/XV 

 somewhat thickened and VII/VIII-XIII/XIV more strongly thick- 

 ened. Sperm sacs, two pairs, one pair in XI, and the other in XII. 

 Si)ermathecre lacking. 



The type and paratypes are in the collection of the senior author. 

 The description of this species is based on specimens found in 

 the lawns and i)arkings of Urbana, Illinois. 



EXTERNAI, CHARACTERS 



The rose-red coloration is most pronounced on the antero-dorsal 

 surface, the other parts being distinctly paler. The clitellum is flesh- 

 colored. The length of the type specimen is /2 mm. and its maximum 

 diameter 3.5 mm. at the clitellum. The diameter of the preclitellar 

 part is slightly less than this, but somewhat exceeds that posterior to 

 the clitellum. There are 98 somites in the type specimen and 98-122 

 in the paratypes. Each somite is divided by an indistinct median 

 annulus, and the anterior half of the somite has a somewhat fainter 

 coloration than the posterior. The length of the anterior somites does 

 not exceed that of the posterior ones. The relative distances between 

 the setie indicated by the formula aa: ah : he : ed: dd =^ 10: 1: yYz'. 

 yi : 30, apply to the arrangement both anterior and posterior to the 

 clitellum. In one specimen, he is relatively greater and dd corre- 

 spondingly less. 



The clitellum is on XXIII-XXXII or XXXIII, and is saddle- 

 shaped. Its ventral margins converge slightly from XXIV to XXXI 

 and on XXVII-XXXI reach /;, which is the ventral limit of the cli- 

 tellum. No traces of tubercula pu])ertatis are recognizable. The paired 

 spermiducal jjores are on X\\ slightly dorsad of h. Each is sur- 



