384 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 2 



about in midbody. Posttesticular space 0.60D to 0.900. Cirrus sac with a 

 long, slender, anterior portion extending from the pore diagonally back- 

 ward to acetabulum then almost directly backward to posterior border 

 of acetabulum where it may make a short coil or loop and joins a large, 

 swollen, posterior portion. Seminal vesicle large and much coiled within 

 the posterior portion of the sac, sinuous in the narrow portion; pros- 

 tatic cells large and fairly numerous in the basal region of the sac. 

 The cirrus sac reaches entirely or almost to the anterior edge of the ovary. 

 Ovary globular, smooth, wider than long, slightly to the right, directly 

 anterior to the anterior testis. Shell gland at the left posterior edge of 

 ovary; seminal vesicle pyriform, dorsal to ovary. Vitelline follicles large, 

 from anterior border of ovary to posterior end of body, dorsal, ventral, 

 and lateral to ceca, uninterrupted, a few follicles dorsal to testes and 

 ovary. Uterus preovarian ; eggs thin shelled, variable, 70 to 83 by 32 to 

 48 [x, usually 73 to 82 by 36 to 46 /x. Excretory vesicle extending forward 

 to the ovary; a pair of collecting tubules median to ceca between ovary 

 and posterior end of body. 



The specific name is from meco {= long) and pera (= pouch) and 

 refers to the very long cirrus sac. 



Co?nparisons. No other species of Podocotyle has the vitellaria termi- 

 nating at the ovary. The peculiar shape and the far posterior extent of the 

 cirrus sac are also unique. Although P. pearsei Manter, 1934 and P. pet- 

 alophallus (Yamaguti, 1934) have only indistinctly lobed ovaries, P. 

 mecopera is the only species with entirely smooth ovary. 



Podocotyle breviformis, new species 

 (Plate 40, figs. 66-68) 



Host: Anisotremus (?) species 



Location: Intestine 



Locality: Tagus Cove, Albemarle Island, Galapagos 



Number: 7 specimens from one host 



SPECIFIC DIAGNOSIS OF PODOCOTYLE BREVIFORMIS 



Body thick, subcylindrical, about 3 times longer than wide, 1.44 to 

 2.025 long by 0.510 to 0.675 in greatest width; forebody (in preserved 

 specimens) ^4 ^o % t)ody length, tapering to oral sucker; hindbody tap- 

 ering gradually to a rounded posterior end. Oral sucker circular, 0.210 

 to 0.270 in diameter; acetabulum wider than long, 0.382 to 0.520 in 

 transverse diameter, with transverse aperture; sucker ratio approximately 



