TREMATODES FROM FISHES — LINTON 117 



Genus GENARCHES Looss, 1902 



GENARCHES MULLERI (Levinsen) 



Plate 22, Figures 298, 299 ; Plate 23, Figxjre 300 



Distomtim mulleri Levinsen, Overs. Danske Vitleusk. Selks. Forh., 188.1, p. 56, 



pi. 2, fig. 3. 

 Progonus mulleri (Levinsen), Looss, Zool. Jahrb., vol. 12, p. 642, 1899. 

 Gcnarchcs miilleri (Levinsen), Looss, Zool. Jahrb., vol. 16, p. 732, 1902. — 



Odhnehi, Die Trematoden des arktischen Gebietes, Fauna Arctica, vol. 4, pp. 



365, 366, pi. 4, figs. 8, 9, 1905. 



Three, fusiform, rusty, yellowisli-red distomes from the lumpfish 

 are referred to this species. On account of the large number of eggs 

 in each of them, but few details of the anatomy can be made out. 



The body is smooth, ventral sucker much larger than oral and situ- 

 ated about the middle, or a little back of the middle; pharynx much 

 smaller than the oral sucker; no prepharynx; esophagus very short, 

 genital pore median, at posterior end of pharynx; cirrus short, 

 smooth ; cirrus pouch small, a little behind the pharynx ; seminal ves- 

 icle posterior to the cirrus pouch ; testes at posterior border of ventral 

 sucker, nearly opposite; vitelline glands two, subglobular, opposite, 

 near posterior end ; ovary to right of median line at the anterior bor- 

 der of the right vitelline gland; seminal receptacle behind the ovary 

 and between the vitellaria. The thick-shelled ova fill the greater part 

 of the body from the posterior end to the genital pore. Ova, 0.048 to 

 0.054 mm. by 0.033 mm., in balsam. 



Table 28. — Measurements of two specimens of Genarches miilleri in balsam 



Measurement 



Length 



Breadth 



Anterior end to ventraJ sucker 



Oral sucker, length 



Oral sucker, breadth 



Pharynx, length 



Pharynx, breadth 



Ventral sucker, length.. ,. 



Ventral sucker, breadth 



» Ventral view. 



' Lateral view. 

 GENARCHES INFIRMUS. new species 



Plate 23, Figtjees 301, 302 



Smooth, fusifonn, greatest diameter about at level of ventral 

 sucker; neck somewhat elongated, ventral sucker, except when the 

 neck is contracted, being but little in front of the middle; oral 



