687 



the other, for back from the sucker, in or beyond the middle of the 

 post-acetabular portion of the body. The uterus Hes behind the 

 testes instead of in front of them, and is thrown into numerous 

 short, transverse folds between the coeca, extending to the posterior 

 end of the worm, instead of few transverse folds between sucker and 

 testes. Less important differences are the slightly larger size, the 

 narrower body, the small ventral sucker, the genital pore being near 

 the ventral sucker, so that the penis-sac extends over or beyond the 

 latter, small ovary to left of sucker, shorter vitellaria, prominent 

 pharyngeal glands, smaller eggs (0,042 X 0,022 mm living). 



69) Cephalogouimiis americanus, 



Intes. Rana virescens Kalm. (Com. Frog). Rana clamata Daud. 

 (Spring Frog). 

 (Centralbl. Bakt. etc. XXXII. Bd. 1902. p. 719—725.) 



70) Pneumonoeces longiplexiis. 



71) Pneumonoeces breviplexus. 



72) Pneumonoeces varioplexus. 



73) Pneumonoeces similiplexus. 



74) Pneu?no?ioeces medioplexus. 



Lungs of american frogs and toads. 



In the same issue of the Zool. Jahrb. (Heft 3—6 1902 p. 895— 

 912) in which I described these species Looss (p. 732) substituted 

 the generic name Pneumonoeces for Haematoloechus. Ostiohi?n for- 

 mosum Pratt (Mark Anniversary Vol. 1903) is doubtless the same 

 worm as Pneumonoeces medioplexus, 



75) Gorgodera amplicava Looss. 



76) Gorgoderhia attenuata. 



11) Oorgoderina simplex Looss. 



78) Gorgoderina opaca. 



79) Gorgoderina translucida. 



Urinary bladder of american frogs and toads. 



In the Zool. Jahrb. Heft 3 1902 p. 420 I recommended the separ- 

 ation of the European species Gorgodera cygnoides Zeder and the 

 american species G. amplicava Looss^from the other four american 

 species, and in the same issue (Heft 3 — 6 p. 851) Looss proposed 

 the generic name Gorgoderina for the american species G. simplex. 



80) Halipegiis occidualis. 



Mouth, Rana catesbiaìia Shaw (Bull. Frog), Rana clamata Daud. 

 (Spring Frog). 



New species: occidualis., western. This worm was first reported by 

 Xickerson (Zool. Bull 1898. p. 261—264) and later by myself 



