PARASITES OF GALVESTON" BAY FISHES — CHANDLER 141 



Dilepls kemfi Southwell, 1921, from a cormorant in Assam. In this 

 the hooks are similar, but the scolex and suckers are markedly 

 smaller. 



CYSTICERCOIDES MENIDIAE, new species 



Specific diagnosis. — Small oval cysticercoids 200/a to 300/1. long 

 and 150ja to 185/>i broad. Evaginated scolex about 155/x broad and 

 135/^ long, with poorly defined suckers but provided with 20 (or 

 18?) hooks in a double row^, the short hooks 50/x long, the long ones 

 about 70/x. 



Host. — Menidia menidia. 



Location. — Intestinal wall and mesenteries. 



Locality. — Galveston Bay, Tex. 



Type specimen. — U.S.N.M. Helm. Coll. no. 39530. 



Remarks. — A few of these small tapeworm cysts were obtained 

 from a silversides along with specimens of the gasterostome Rhipi- 

 docotyle transversale. It is probably the larvae of an avian parasite 

 of the family Dilepididae, but I have not been able to identify the 

 hooks with those of any North American species. 



Class NEMATODA 



Family ASCARIDAE Cobbold, 1864 



Subfamily Anisakinae Railliet and Henry, 1912 (emend. Baylis, 



1920) 



CONTRACAECUM COLLIERI, new species (= C. MICROPAPILLATUM?) 



Plate 10, Figures 6-S 



Speci-flc diagnosis. — Body reddish, robust, bluntly rounded at head 

 end, conical at caudal end. Length 18 to 26 mm, with maximum 

 diameter of 600/x to T50/x. Head without distinct lips, but truncated 

 and with pair of slight liplike elevations, one of which bears boring 

 tooth, which is not pointed but resembles a knoblike papilla. 

 Shortly behind head body conspicuously annulated for distance of 

 about 200/^, beyond which annulations (pi. 10, fig. 7) become indis- 

 tinct. Diameter through posterior part of striated region about 

 240/A to 250,a. Esophagus 2 to 3 mm long with diameter of about 

 75jLi, followed by appendix about 450jtt to 590/i long. Anterior diver- 

 ticulum of intestine 1.45 to 1.9 mm long. Anus 180/Lt to 200/* from 

 posterior end of body. 



Type host. — Gyprinodon variegatus. 



Location. — Body cavity. 



Locality. — Galveston Bay, Tex. 



Type specimen. — U.S.N.M. Helm. Coll. no. 39531. 



