NO. 7 XKW DlGKNl.rrC TKKMATODF.S PRICE 5 



in the subfamily Lecithostaphylinae. It is possible that Mesohcitha 

 Linton (syn., Mcsorchis Linton) may l^elong to this subfamily, but 

 more study is necessary before this can be determined with certainty. 



Family ALLOCREADIIDAE 



Subfamily ALLOCREADIINAE 



PLAGIOPORUS FUSIFORMIS, n. sp. 



Plate I, fig. 4 



Description. — Body fusiform, 1.27 .to 1.7 mm long by 475 to 680 fx 

 wide at level of acetabulum, slightly flattened dorso-ventrally. Cuti- 

 cula delicate, unarmed. Oral sucker 120 to 152 ju, in diameter; acetab- 

 ulum 220 to 340 IX long by 280 to 576 fi wide, in equatorial zone. 

 Prepharynx 20 to 40 /a long ; pharynx 40 to 60 ju long by 40 to 80 /t 

 wide ; esophagus 200 to 240 ju, long ; intestinal ceca simple, extending 

 to level of posterior testis. Excretory aperture terminal ; excretory 

 vesicle tubular, extending anteriorly as far as level of anterior testis. 

 Genital aperture near left margin of body and about midway between 

 pharynx and intestinal bifurcation. Cirrus pouch slender, about 300 ^i 

 long, its base lying in median line dorsal to acetabulum, and con- 

 taining a slender unarmed cirrus, prostate cells, and a slender, 

 somewhat convoluted seminal vesicle ; a distinct pars prostatica ap- 

 parently absent. Testes elongated transversely, tandem and in con- 

 tact, in anterior part of posterior third of body ; anterior testis about 

 80 /A long by 240 IX wide ; posterior testis 120 /x long by 240 /x wide. 

 Ovary trilobed, about 60 ^ long by 180 /x wide, pretesticular, mostly 

 to right of median line. Seminal receptacle and Laurer's canal present, 

 the latter opening in the mid-dorsal line at level of ovary. Vitellaria 

 extending from level of genital aperture to about half way between 

 posterior testis and posterior end of body. Uterus with relatively 

 few coils, preovarial ; metraterm extending from near center of acetab- 

 ulum to genital aperture. Eggs oval, 70 to yz fx long by 36 fx wide, 

 with thin, yellowish shells. 



Host. — Eel (Xciwinysta.v sp.) (J-S 447 and 448). 



Location. — Litestine. 



Locality.— Station 84 (lat. i8°39' >^'- ^ong. 65° 17' W.). 



Type specimen. — U.S.N.M. Helm. Coll. no. 8716; paratypes 

 no. 8717. 



Plagioponis fusiformis appears to be more closely related to P. 

 serotinus Stafford than to any of the other species so far placed in 

 the genus, but diff'ers from that species in tlie length of the ceca which 



