2 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 71 



Male. — The male is al)out 7.2 mm. long by about 218/i, in maximum 

 width in the region of the spicules where the body is decidedly 

 swollen. The externo-lateral ray (pi. 1, fig. 2) is more slender than 

 the latero-ventral ray which is the thickest of all rays; the externo- 

 lateral ray comes next in thickness; the medio-lateral and postero- 

 lateral rays have about the same thickness; the externo-dorsal is 

 next in thickness, and the ventro-ventral is the most slender of the 

 paired rays; the tips of the paired rays, that is, all rays other than 

 the dorsal ray, come close to the edge of the bursa, those of the 

 medio-lateral and postero-lateral raj^s being most closely approxi- 

 mated to each other; the dorsal rays (pi. 1, fig. 3) bifurcates, each 



terminal branch ending in two 



.^^^^I^T#;>^, blunt digitate processes; each ter- 



ji: s^ minal stem of the dorsal ray 



gives off a branch in its posterior 

 i; : portion having a more or less hori- 



M I zontal direction along the trans- 



pi ■ i verse axis of the worm. The spic- 



% I ules (pi. 1, fig. 4) are from 304 to 



p '§ 320/x long and are provided with 



% ,■ seven tooth-like processes di- 



rected toward the median line in 

 .^./ its posterior portion. 



-^' Female. — The female is slightly 



-" over 11 mm. long by about 200^ 



Fig. 1. — CooPERiA NODULOSA. Top view • • • i,i rm 1 



oj, jjjj^jj m maximum width. Ihe vulva 



(pi. 1, fig. 5), located at a distance 

 of 2 mm. from the tip of the tail, is transversely elongated and is 

 covered by a prominent cuticular linguiform flap. The combined 

 lengths of the ovejectors, including the sphincters, is about 440/*. 

 The tail (pi. 1, fig. 6) is about 210/x long and tapers to a point. The 

 eggs are from 40 to 51/x long by 31/x wide. 



Host. — Buhalus huhalus. 



Location. — In nodules in mucosa of small intestine. 



Locality, — Los Baiios, Laguna, P. I. 



Tyye spedniens. — U. S. National Museum No. 24863. 



Pamtypes. — U. S. National Museum Nos. 24864 and 24865. 



Genus COOPERIA 



The genus Gooperia was proposed by Ransom (1907) who assigned 

 to it four species as follows: Coopeiia curticei (Railliet, 1893) 

 { = Cooperia curticii Giles, 1892); Gooperia punctata (Schnyder, 

 1907) ; Gooperia oncopJiora (Railliet, 1898) ; and Gooperia pectinata 

 Ransom, 1907. Since 1907 the following species have been added to 



