4 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 78 



140^1 to 145fi from posterior end. Tail with narrow alae, provided 

 with four pairs of preanal and three pairs of postanal papilla, all 

 slender, and narrower at the base than at the tip. In some specimens 

 an additional very narrow preanal papilla and a postanal papilla 

 are visible. Tail bluntly pointed. Spicules unequal, the shorter one 

 trowel-shaped, l'S5fjL to 145/i, long and 15;a broad, the longer one 385/x 

 to 400^ long and only about Tju. to 8/x, broad for the greater part of 

 its length, although it widens out to about 10;a or 12/a at the proximal 

 end. 



Female 14 to IG mm. long with a diameter of about 285ju,. Vulva 

 situated at approximately the center of the body. Vagina extends 

 backward about 250/x and then forks into an anterior and a posterior 

 uterus filled with eggs. The ovaries are moderately convoluted, the 

 loops of the anterior one extending forward to the region of the 

 junction of the anterior and posterior portions of the esophagus, 

 those of the posterior one extending almost to the posterior end of 

 the tail. Tail very short and conical, the anus situated about IIO/a 

 from the tip. Eggs oval, measuring about 42/^ by 26jli, with thick 

 shells but without the terminal filaments described by Leiper (1908) 

 for C. farionis. 



Host. — SalveliniLS fontinalis. 



Location. — Stomach. 



Locality. — Near Elizabethtown, Adirondack Mountains, New York. 



Type specimens. — United States National Museum, helminthologi- 

 cal collection No. 8098 ; paratypes No. 8099. 



These worms, members of the family Thelaziidae, were found by 

 Mr. P. D. Harwood in considerable numbers in the stomachs of brook 

 trout from Roaring Brook near Elizabethtown ; all of nine specimens 

 from that locality were infected. Nine other brook trout from Lily 

 Pad Pond, in the same general neighborhood, w^ere negative. A 

 number of specimens of brown trout, Trutta fario, found in the 

 same locality as the brook trout, were negative. This is the first 

 record of a Cystidicola parasitic in the stomach; the type species, 

 C. farionis., is an inhabitant of the air bladder, occasionally being 

 found in the esophagus. The air bladders of these fish contained no 

 parasites. 



LITOMOSOIDES, new genus 



Generic diagnosis. — Filariidae; Filariinae: Body slender and cy- 

 lindrical, W'ith cuticle very finely striated except at the extremities, 

 where it is smooth. Head bluntly rounded, the mouth without lips 

 or papillae. Oral vestibule a slender tube provided with thick chitin- 

 ous walls; esophagus of moderate length, not divided into two por- 

 tions, and straight except for a slight bulbous enlargement at the 

 anterior end, into the anterior part of which the vestibule extends, 



