6 SMITHSONIAN MIS( F.LLANEOUS COLLECTIONS VOL. QI 



in P. fusiforiiils extend only to the level of the posterior testis, where- 

 as in P. serotinus they extend to the posterior end of the hody. 



In coni])aring" the species of the genus Pla(/ioponis Staflord with 

 those included in the genus Lehonria Nicoll the writer is convinced 

 that the latter are congeneric with P. serotinus, type of Plagioporus. 

 Stafiford's ( 1904 ) description of P. serotinus is rather meager, but all 

 of the generic characters are clearly indicated ; therefore, the writer 

 transfers the species Lehouriu. adiicta Nicoll. L. accrinae Pigulevsky. 

 L. alacris (Looss), L. coo peri Hvmter and Bangham. L. crassigiila 

 I.inton. L. elongata Goto and Ozaki. L. idonca Nicoll. L. isaitschiko'mi 

 Layman, L. nicolli Isaitschikov. L. obducta Nicoll, L. tuniididmn 

 (Rudolphi), and L. varia Nicoll to the genus Plagioporus, the new 

 combinations being, respectively. P. aducta (Nicoll), P. acerinac 

 (Pigulevsky), P. alacris (Looss). P. coo peri (Hunter and Bangham). 

 P. crassigula (Linton), P. elongata (Goto and Ozaki). P. idonea 

 (Nicoll). P. isaitschikoivi (Layman). P. nicoUi (Isaitschikov). /'. 

 obducta (Nicoll), P. tuniiduluui (Rudolphi). and P. varia (Xicoll). 



From the above species, which up to the present time have been 

 included in the genus Lebouria, Plagioporus fusifonnis may be dis- 

 tinguished by the distinctly fusiform shape of the body and by the 

 very large, equatorially placed acetabulum. In the extent of the in- 

 testinal ceca posteriorly, this form resembles P. nicolli and P. coo peri 

 more than the others ; P. fusifonnis may be differentiated from P. 

 nicolli in that loops of the uterus pass between the ovary and testes 

 in the latter species, a condition not occurring in P. fusiforuiis or in 

 any of the other species of the genus. P. fusiforuiis differs from P. 

 cooperi in having a larger and more equatorially placed acetabulum, 

 in having the genital aperture situated more anteriorly and nearer 

 the body margin, and in having the testes tandem in position instead 

 of being placed diagonally as in P. cooperi. 



PODOCOTYLE LANCEOLATA, n. sp. 



Plate I. fig. 5 



Description. — Body lanceolate. 1.95 to 2 mm long by 045 to 850 /x 

 wide, strongly flattened dorso-ventrally and more attenuated anteri- 

 orly than posteriorly. Cuticula with(jut spines or ridges. Oral sucker 

 subterminal. 100 to 189 /x in diameter; acetabulum 220 to 240 fj. 

 long by 240 to 280 ft wide, about one third body length from anterior 

 end. Prepharynx short ; pharynx somewhat globular. 88 to 100 fx 

 long by 88 /x wide; esophagus 160 to 200 /x long; intestinal ceca 



