691 



Each of the two ear-Hke projections of the wall of the mouth-sucker 

 has a lateral pit above it. 



85) Lechriorchis primus. 



Lung, Eutenia sirtaUs L. (Common Garter Snake). 



New genus and species: l&xQiog, oblique; oq/jç^ testicle; primus, 

 first. Briefly described in Zool. Anz. XXV, 673/674, 1902 p. 282 

 No. 14. Broadest at first third, tapering before and behind. A se- 

 lected specimen measured 4,92 X 1,19. Oral sucker 0,399, ventral 

 0,630, one third back. Skin spines. Pharynx half as long as oral 

 sucker. Oesophagus same length as pharynx. Pharyngeal glands. 

 Ends of coeca clasped between testes, two thirds back. Testes large 

 • 0,72 X 0,35, almost parallel (left in advance) and almost tonching. 

 Large penis-sac, generally above right side of acetabulum and ex- 

 tending from posterior margin of latter to genital pore close up in 

 fork of intestine, enclosing vesicula seminalis, ductus ejaculatorius, 

 and protrusible penis. Small ovary, 0,2, spherical or oval, at end of 

 penis-sac, generally right, at posterior margin of ventral sucker. 

 Uterus extending almost straight back to posterior end and then for- 

 wards again, broad, filled with dark-brown eggs measuring 0,053 

 X 0,024. Vitellaria nearly full length of coeca. One specimen was 

 cercaria-shaped, constricted between ventral sucker and testes, but 

 contained a few eggs. 



■ Renifer elongatus Pratt, I think, should come into this genus, lea- 

 ving R. ellipticus the type of that genus , while R. variabilis should 

 be separated from both of them. 



Lechriorchis resembles Saphedera, Plagiorchis, and Haplometra. 



86) Zeugorchis aequatus. 



Oes., stom., Eutenia sirtalis L. (Common Garter Snake). 



New genus and species: tsvyog^ pair; oQyjg, testicle; aequatus, 

 balanced. Briefly described in Zool. Anz. Bd. XXV Nr. 673/674 1902 

 p. 482 No. 15. Long-eUiptical, broadest through ventral sucker, 

 rather narrower behind than in front. Length of a specimen 2,29. 

 Breadth 0,61 (a living worm measured 3 X 0,75). Oral sucker 0,24 

 on under side of anterior end which projects above it. Ventral sucker 

 0,22, its centre 0,92 from anterior end. Spines all over surface. 



Very short pre-pharynx, pharynx 0,13, Oesophagus 0,20, coeca ex- 

 tending to testes which separate them from posterior end, pharyngeal 

 glands. Testes rather longer than broad and little broader than ends 

 of coeca against which they fit, left and right, parallel, and separated 

 from each other. Penis-sac large, generally right, above ventral 

 sucker, beyond the posterior margin of which it may extend, enclosing 

 vesicula seminalis, ductus, prostate glands and a penis which is 



