ART. 4 



FOUR NEW TREMATODE WORMS PRICE 



9 



ingeri they are separated by a distinct space; the vitellaria extend 

 from a short distance cephalad of the anterior testis to the level 

 of the posterior margin of the acetabulum in U. scahridum^ whereas 

 in TJ . shillingeri these glands extend from a short distance caudad 

 of the ovary to the level of the anterior margin of the acetabulum. 

 The eggs are similar in both species, but those of U. shillingeri are 

 somewhat longer than those of U. scohridum. 



Urotrema scabrldum was originally described by Braun (1900) as 

 a parasite of Brazilian bats, and this species or a closely related form 

 has been collected by the writer from bats in Texas. This fact, 

 coupled wit)i the fact that only a single specimen of U. shillingeri 

 was found in a large number of viscera examined, suggests that the 

 occurrence of this species in the muskrat is only accidental, and that 

 its normal host is some insectivorous mammal such as a bat. 



Family NOTOCOTYLIDAE Liihe, 1909 

 Subfamily Notocotylinae Kossack, 1911 



PARAMONOSTOMUM PSEUDALVEATUM, new species 



Figure 4 



Specific diagnosis. — Paranionostomum : Body ovoid, 387ju, to 496/x 

 long by 310/A to 341/* wide, slightly attenuated anteriorly and 

 rounded posteriorly; the dorsal surface 

 is convex and the ventral concave. Cuti- 

 cle smooth and apparently without spines. 

 Oral sucker 38ju, to 52/* in diameter, ter- 

 minal. Esophagus 10/i, to 15/i, long; in- 

 testinal ceca simple, the terminal portions 

 passing between the testes. Testes oval, 

 l\2>n to 120/i long by 53/* to 57/* wide, with 

 slightly undulating margins, situated ex- 

 tracecally and opposite each other at the 

 posterior end of the body. The vas 

 deferens extends forward in the median 

 line and expands anteriorly to form a 

 convoluted seminal vesicle which lies free 

 in the parenchyma at the base of the 

 cirrus pouch and to the right of the me- 

 dian line. Cirrus pouch piriform, 74/* to 

 97/* long by 37/* to 60/* wide near its base, 



containing a well-developed prostate and an unarmed cirrus. The 

 genital pore is situated at the posterior margin of the oral sucker. 

 The ovary is irregular in outline, 75/* to 90/* long by 67/* to 97/x 



Figure 4. — Pakamonostomum 

 pseudalveatdm. ventral 



VIEW 



