DIGENETIC TREMATODES — MANTER AND VAN CLEAVE 323 



less than twice the diameter of oral sucker. Prepharynx short; 

 pharynx 0.061 to 0.095 mm. in length by 0.075 to 0.124 mm. in 

 width; length of esophagus one to two times length of pharynx; 

 intestinal bifurcation a short distance anterior to acetabulum; 

 ceca ending blindly a short distance anterior to posterior end of 

 body. 



Genital pore (gp, pi. 12, figs. 8, 9) muscular, slightly to left of 

 midline at midpharyngeal level. Testes (t, pi. 12, fig. 8) large, 

 tandem or slightly diagonal, close together, smooth or slightly 

 irregular in outline. Posterior testis usually with a slightly in- 

 dented outline. Cirrus (cir, fig. 9) very short; prostatic vesicle 

 (pv) small and ovoid; seminal vesicle (sv) sinuous, somewhat 

 more swollen posteriorly, extending dorsal to acetabulum to mid- 

 acetabular level or to near posterior edge of acetabulum; cirrus 

 sac lacking. Ovary 3- or 4-lobed (ov, fig. 8), partly to the right 

 and partly anterior to anterior testis. Uterus beginning to left of 

 ovary, mostly preovarian. Seminal receptacle and metraterm lack- 

 ing. Vitelline follicles (v, fig. 8) large, extending from posterior 

 end of esophagus to posterior end of body; lateral, dorsal, and 

 ventral to ceca ; anterior to acetabulum they are lateral and dorsal 

 but only scantily dorsal to ceca; confluent posterior to testes; al- 

 most confluent anterior to acetabulum. Eggs 61 to 71/a (rarely to 

 80)^) by 27 to 49^; collapsed eggs 61 to 68/x by 27 to S2ix; un- 

 collapsed eggs near ovary and probably more nearly representing 

 the size of living eggs, 68 to 71ju, by 42 to 49/1,. Excretory vesicle 

 extending forward almost to ovary. 



Host. — Umbrina roncador Jordan and Gilbert, yellowfin croaker. 



Location. — Intestine. 



Types. — Holotype and paratype, U.S.N.M. Helm. Coll. No. 37146. 



Discussion. — P. umbrinae differs from all species in the genus, 

 except P. gibbonsiae, in that the vitellaria extend anterior to the 

 acetabulum. It is the only species in which the seminal vesicle does 

 not extend posterior to the acetabulum. The acetabulum is rela- 

 tively larger than in P. japonicus, P. elongatus, or P. tortugae, 

 and relatively smaller than in P. vulgaris. It differs from P. gib- 

 bonsiae in its lobed ovary, smaller pharynx, more flattened body, 

 and much smaller eggs. 



Genus HELICOMETRINA Linton, 1910 



HELICOMETRINA EXONGATA Noble and Park. 1937 



Plate 13, Figure 10 



Hosts. — Clinocottus analis australis Hubbs,^ tide-pool woolly 

 sculpin; Gibbonsia elegants (Cooper),^ ocellated sawfish; Gibbonsia 

 metzi Hubbs,^ weed sawfish. 



" New host record. 



