TWO NEW TREMATODES 217 



Type specimens: U.S. Nat. Mus. Helminthol. Collections Nos. 

 37447-37448. 



Description (based on 4 specimens from Africa and 5 from New 

 Zealand) : Length of body 4.662 to 8.170 mm, maximum width 0.774 

 to 1.505 mm. Haptor 1.290 to 2.940 by 0.795 to 1.290 mm. Oral sucker 

 wider than long, 0.210 to 0.312 by 0.296 to 0.366 mm. Preoral mem- 

 brane lacking or very slightly developed ; inner surface of sucker with 

 very prominent papillae. Suckers of haptor with membranous flange; 

 inner surface with very evident papillae and also some parallel ridges. 

 Sclerites of anterior pair of suckers somewhat smaller than other two 

 pairs. Hooks of sclerites with rather abrupt curve; hooks of anterior pair 

 of sclerites much smaller than those of other sclerites (Fig. 8), this dif- 

 ference being even greater than the difference in size of sclerite (Fig. 8). 

 Length of large sclerites disregarding curvature, 0.343 to 0.538 mm; 

 length of smaller sclerites, 0.319 to 0.444 mm. Appendix 0.702 to 1.720 

 mm long; with a pair of elongate suckers 0.156 to 0.351 mm in length. 

 Hookets of appendix remarkably constant in size, 57 to 61 /a in length 

 (usually 57 to 59 jx), with fairly short subequal roots (Fig. 9). 



Pharynx spherical or subspherical, 0.078 to 0.098 mm in diameter; 

 esophagus and ceca with lateral branches, inconspicuous and well con- 

 cealed by vitellaria, entering the appendix and the haptor. 



Atrial pore median, about % to ^i body length from anterior 

 end of body. Vaginal pores a short distance posterior to atrial pore, about 

 halfway between midline and sides of body. Testes numerous, about 50 

 to 65 in number, close together in posterior third of body. Vas deferens 

 glandular, sinuous, in midline to base of cirrus ; cirrus cylindrical, some- 

 what wider in its anterior portion. Ovary beginning as a lobed structure 

 near midbody, becoming a spirally coiled tube extending backward to 

 testicular field, then bending forward to a point about ^ the distance 

 back to its base, where it narrows to form the oviduct (Fig. 10). Ovi- 

 duct sinuous, receiving the common yolk duct, then, as the uterus, forming 

 a short posterior loop before extending forward, ventral to vas deferens, 

 to the genital atrium. Genito-intestinal canal present, relatively long and 

 usually sinuous among the loops of the ovary, extending anteriorly, con- 

 spicuous when filled with yolk cells. Seminal receptacle lacking. Vitelline 

 follicles distinct, filling most of body from just posterior to the vaginal 

 pores to near posterior end of body but not quite reaching the haptor 

 and not entering appendix. The common yolk duct arising at anterior 

 edge of ovary and relatively long (Fig. 10). Vaginae straight and parallel 

 to each other, entering transverse yolk duct separately near anterior edge 



