ART. 13 TEEMATODE PARASITES OF MARINE MAMMALS PRICE 23 



Description. — Stephanoprora: Bodj^ elongated, 2.08 mm to 

 2.64 mm long by 288/x to 352/* wide at acetabulum. Cuticle of an- 

 terior part of body closely beset with spines arranged in alternating 

 transverse rows ; these rows are close together in the region anterior 

 to acetabulum, but caudad of this point they are more widely 

 separated and finally disappear in the region of the anterior testis. 

 Oral sucker subterminal, 74/* to 92/x in diameter, surrounded by a 

 well-defined reniform collar, 213/i to 237/* wide. The collar bears 

 22 spines arranged in a single row, which is interrupted dorsally 

 by a space almost as wide as the oral sucker. Four of these spines, 

 two on each ventral lobe, are slightly smaller and more aboral than 

 the marginal spines; they measure 29/* to 37/t long by 11/* to 14/i 

 wide; the marginal spines are 37/i to 44/* long by 11/* to 15/i wide. 

 Acetabulum almost circular, 185/* to 222/t in diameter, situated 370/* 

 to 560/1 from anterior end of body. Prepharynx 37/* long; pharynx 

 81/* to 110/t long by 74/1 wide; esophagus 92/i to 166/t long; intestinal 

 ceca slender. Genital pore situated about midway between intestinal 

 bifurcation and anterior margin of acetabulum. Cirrus pouch 

 ovoid, 185/1 to 222/t long by 48/i to 129/i wide, containing a large 

 seminal vesicle, pars prostatica, and short cirrus. Testes tandem 

 in position, situated in equatorial zone; anterior testis globular, 

 166/* to 229/1 in diameter; posterior testis ovoid, 203/* to 259/1 long 

 by 148/1 to 222/t wide. Ovary transversely oval, 85/t to llO/i long by 

 100/t to 122/t wide, situated cephalad of anterior testis and to right 

 of median line. Vitellaria consisting of large follicles and extend- 

 ing from level of posterior margin of anterior testis to near pos- 

 terior end of body. Uterus short and with few coils. Eggs 74/i 

 to 77/t long by 52/t to 55/t wide. 



Host. — Zalop h us calif orniatviis. 



Location. — Small intestine. 



Distrlhufion. — North America — United States (Washington, 

 D. C). 



jSpecimens.— U.S. 'N.M. Helm. Coll. No. 28147. Collected by E. W. 

 Price, June 1, 1928, from a California sea lion, which died in the 

 National Zoological Park. 



^to^ 



Family TROGLOTREMATIDAE Odhner, 1914 



Family diagnosis. — Body compact, more or less flattened ventrally 

 and convex dorsally. Cuticle with pointed spines. Body muscula- 

 ture as well as that of suckers weakly developed. Excretory vesicle 

 Y shaped or tubular. Pharynx present; esophagus short; intestinal 

 ceca extend to near posterior end of body. Genital pore near 

 acetabulum, either immediately in front or behind, median or slightly 

 to the left. Cirrus pouch absent except in Troglotrenna; pars prosta- 



