AUT. 4 NEW HELMINTH PARASITES PEICE 6 



parallel, well cliitinized pieces, each measuring 44/x in length. The 

 telamon is composed of two feebly chitinized parts embedded in the 

 wall of the cloaca; the anterior part appears as a relatively wide 

 band showing a deep notch in the antero-dorsal border and a similar 

 notch in the postero-ventral border; the posterior part is composed 

 of a narrow band extending across the dorsal wall of the cloaca and 

 the two ends of this band appear to unite or fuse with a V-shaped 

 structure embedded in the ventral wall. (Fig. 4.) 



Female 14 mm. long and 220/* in diameter. The vulva is a trans- 

 verse slit located about 3.5 mm. from the end of the ta,il. The tail 

 (fig. 5) terminates in a slender filamentous tip and is also provided 

 with three spike-like processes. The terminal filament is about 23/* 

 long and the spines about 16/i long. The anus is located about 185/i 

 from the tip of the tail. The ovejectors (fig. 6) are strongly muscu- 

 lar and with a combined length, including sphincters, of 585 to GOO/*. 

 The eggs (fig. 7) are oval, 66 to 69/x long and 33 to 40/* wide. 



Host. — Three-toed sloth, Bradypus sp. 



Location. — Small intestine. 



Locality. — Central America (Penonome, Panama). 



Type specimens. — United States National Museum Helmintho 

 logical Collections No. 27002. 



The female of this species closely resembles that of the genus 

 Anoplostrongyliis., a genus proposed by Boulenger (1926) for cer- 

 tain trichostrongyles of bats ; the male, however, appears to be more 

 closely related to Ornithostrongylus Travassos, 1914, and in the key 

 given by Yorke and Maplestone (1926) it would run out at that 

 genus. The dorsal ray, spicules, and gubernaculum appear to be 

 sufficiently different from those of either of the above genera to war- 

 rant the creation of a new genus. 



GRAPHIDIUM BROWNI, new species 



SpecifiG diagnosis. — Graphidium : Cuticle of the anterior extremity 

 slightly inflated and coarsely striated transversely. (Fig. 8.) The 

 cuticular expansion is about 77/t. long and 38/x in diameter. The body 

 shows numerous fine, wavy striations, and is also finely striated 

 transversely. The oral aperture is surrounded by three small incon- 

 spicuous lips. The esophagus is 650/i long in the male and 740/1 

 long in the female, slender, slightly enlarged posteriorly, and is 32/i 

 wide about the middle and 58/1 wide at the enlarged posterior por- 

 tion. The nerve ring is situated 237 to 260/c from the anterior end. 

 The excretory pore opens ventrally 340 to 390/i from the anterior 

 end. Cervical papillae not apparent. 



Male 8.5 mm. long and with a maximum width of about 130/x in 

 front of the bursa. The bursa (fig. 9) is composed of two lateral 



