2 PROCEEDINGS OF THE NATIONAL MUSEUM vol.73 



lobes and an indistinct dorsal lobe. Ventro-ventral and latero-ven- 

 tral rays slightly thicker than the other rays and with their tips 

 divergent; externo-lateral, medio-lateral, and postero-laterai rays 

 about equal in size, parallel proximally and diverging distally; ex- 

 terno-dorsal ray arises from the base of the dorsal ray and is more 

 slender than the other rays; dorsal ray thick, forming two branches 

 distally and with each branch bifurcate; on each side of the dorsal 

 ray, immediately in front of the two branches, a small lateral pro- 

 jection is present. Spicules similar, short, twisted, and with a rela- 

 tively long, twisted, median process. Gubernaculum double and 

 heavily chitinized. Telamon present. Tail of female terminates 

 in a slender tip and is also provided with three spike-like processes. 

 Vulva in posterior fourth of body; ovejectors and sphincters well 

 developed; uteri divergent. Eggs oval, with thin shells of uniform 

 thickness, and not embryonated within the uterus. 



Type species. — BradypoStrongylus panmnensis, new species. 



BRADYPOSTRONGYLUS PANAMENSIS, new species 



Specific diagnosis. — Brady postrongyhis: Cuticle of cephalic ex- 

 tremitjT^ inflated and coarsely striated transversely. (Fig. 1.) The 

 expanded cuticle is about SS^a long and 50/* in diameter. The head, 

 exclusive of the cuticular expansion, measures 32/x in diameter. The 

 oral aperture is simple. The esophagus is about 770/x long and 52/i, 

 in diameter at the posterior extremity. The nerve ring is situated 

 about 270/i, from the anterior end. Cervical papillae not apparent. 



Male 9.5 mm. long with a maximum diameter, in front of the pre- 

 bursal swellings, of 156/x. The bursa (fig. 2) is large, elongated 

 dorso-ventrally, and composed of two large lateral lobes and an indis- 

 tinct dorsal lobe. The rays of the bursa, with the exception of the 

 externo-dorsals, terminate near the edge of the bursa. The ventro- 

 ventral and latero-ventral rays are slightly thicker than the other 

 rays and divergent; the externo-lateral, medio-lateral, and postero- 

 lateral rays are about equal in size and with their tips well separated : 

 the externo-dorsal rays are more slender than the other rays and 

 terminate some distance from the edge of the bursa; the dorsal ray 

 is heavy and bifurcates to form two branches distally ; each branch 

 in turn bifurcates to form an incurved median branch and a long, 

 slender, widely divergent, lateral branch. A small, cone-like lateral 

 prominence is present on each side of the dorsal ray, immediately in 

 front of the primary bifurcation. The cuticle in front of the bursa is 

 expanded laterally and supported by strong prebursal papillae. The 

 spicules are equal, 205/x long, twisted, and with a twisted filamentous 

 process arising from the inner aspect of each spicule. (Fig. 3.) 

 The gubernaculum is double and consists of two slightly curved, 



