NO. 7 NEW DIGKNF.TTf TKK.M .\T< )DKS PRJCK 3 



extending from anterior margin of acetal)ulnm to near ends of in- 

 testinal ceca. the follicles more nnmerons in acetabular zone; vitel- 

 line reservoir large, median, anterior to ovary. Uterus simple ; no 

 eggs present in available material. 



Host. — MoiiocantJius Jiispldus (Linn.) (J-S 443). 



Location. — Intestine. 



Loca.//YY.— Station 82 (lat. i8°32'48" N., long. 65°23'45" W.). 



7^ype specimen. — U.S.N.M. Helm. Coll. no. 8713. 



Pycnadena pirifonnc differs from /-". lata (Linton) in having the 

 acetabulum more anterior and the genital aperture more anterior and 

 nearer the l)ody margin ; the vitellaria are less well developed than 

 in P. lata, but as the specimen upon which P. pirifonnc is based is 

 more immature than Linton's specimens, the lesser development of 

 the vitellaria may be only a]:»parent. 



The genus Pycnadena Linton (syn., Didyinorcliis Linton) has been 

 included with Fellodistoniuni Staft'ord, Steringophorus Odhner. Rlw- 

 dotreiiia Odhner, Stcringotrenia Odhner. Bacciger Nicoll. and Lin- 

 toniiirn Stunkard and Nigrelli {=Gastris Lithe) in the subfamily 

 Fellodistominae by Stunkard and Nigrelli (1930). The writer doubts 

 whether Pycnadena should be included in this subfamily, or even in 

 the family Fellodistomidae, since there are several characters in 

 which it differs from all the other genera, these being the pretesticu- 

 lar uterus, presence of a seminal receptacle and more profuse de- 

 velopment of the vitellaria. However, at present it is left in the sub- 

 family as a doubtful member until more material is available for study. 



Family ZOO(".( )N1DA1': 



Subfamily LFCITHOSTAPH YLIN AF 



LECITHOSTAPHYLUS ATHERINAE, n. sp. 



Plate I. fig. 3 



Descriplion. — Body spearhead-shajjed. 1.22 to 1.36 mm long by 

 425 to 544 fi in maximum width near equator. Cuticula armed with 

 line .scalelike spines. Oral sucker subterminal. 152 to 160 fx. lotig by 

 100 to 133 fi wide: acetabulum 80 to 100 /x lotig l)y 108 to 120 fx 

 wide, 425 to 510 /x from anterior end of body. Prepharynx 20 to 40 fx. 

 long ; pharynx 80 to 88 /x long by 60 fi wide ; esophagus very short 

 or absent ; intestinal ceca relatively wide, extending to, or slighth- 

 beyond, level of posterior poles of testes. Genital aperture pre- 

 acetabular. 320 to 400 /* from anterior end of body, to left ol median 



