NEMATODE PARASITES OF BIRDS 339 



stability of nomenclature to assume that he did. Otherwise Tetra- 

 meres certa would have to fall if the older specific name dubia of 

 Leidy is available and in consequence Tetrameres dubia Travassos, 

 1917, would fall as a homonym. To avoid this needless rearrange- 

 ment I am interpreting Filaria dubia Creplin as a good combina- 

 tion and Filaria dubia Leidy as therefore a homonym. 



Hosts. — Primary: Albatross (Diomedia ewulans); secondary: Un- 

 known, probably similar in a general way to that of T. fissispina 

 (p. 343) ; 



Location. — Glandular stomach or proventriculus. 



Male 12 to 18 mm. long by 375 to 500/*. wide. Body filiform, at- 

 tenuated anteriorly. Mouth trilabiate. Caudal extremity strongly 

 rolled inwardly, sigmoid at the end, mucronate and alate; alae half 

 oval, narrowing to the end of the mucro. (The character of the tail 

 of the male is unusual for a Tetrameres and raises a doubt as to the 

 male specimens described belonging with the female in this genus.) 



Female 7 mm. long by 7 to 8 mm. wide. Body subglobular, divided 

 into zones; tail conical, projecting abruptly from body. 



Life history. — Probably similar in a general way to that of T. 

 fissispina (p. 343). 



Distribution. — South Atlantic. 



TETRAMERES COCCINEA (Seurat, 1914) Travassos, 1914d 



Synonym. — Tropidocerca coccinea Seurat, 1914m. 



Hosts. — Primary : Phoenicopterus roseus, LJubulcus lucidus, and 

 Platalea leucorodia; secondary : Unknown, probably similar in a gen- 

 eral way to that of T . fissispina (p. 343). 



Location. — Glandular stomach or proventriculus. 



Morphology. — Tetrameres (p. 334). 



Mcde unknown. 



Female 2.2 mm. long by 2.5 mm. wide. Body globular (tig. 403 a), 

 cochineal colored, strongly striated transversely and with 4 longi- 

 tudinal furrows corresponding to the dorsal, ventral, and lateral 

 lines. Head and tail ends conical, tapering prolongations. Buccal 

 cavity (fig. 403&) circular. 20/x long: pharynx 350/*, surrounded in 

 its middle by the nerve ring; cervical papillae in front of nerve ring, 

 at a distance of 120 and 180/t respectively from the anterior end; 

 excretory pore ventral, 18/* behind posterior border of nerve ring; 

 esophagus, 1.4 mm. long, penetrates into the globular mass of the body. 

 Intestine greatly distended, tilled with brown-black detritus. Anus 

 at a short distance from tip of tail. Vulva 480/t anterior to anus. 

 Ovejector (fig. 403c) remarkable for the shortness of vestibule and 

 sphincter; they form a turnip-shaped organ 450/x long. Sphincter 

 very straight. Trompe, Y-shaped, almost 1 mm. total length, the 



