NO. 1160. LEECHES OF THE U. S. NATIONAL MUSEUM— MOOBE. 557 



defined, yellow, longitudinal line. Laterally the blotches are enlarged, 

 dorsally they are narrower, but on each side of the middle line are 

 again drawn out and frequently become longitudinally confluent. Ex- 

 cept in one specimen, the dorsal median. yellow line is scarcely inter- 

 rupted. The twelfth brown annulus is continuous across it in all four 

 specimens, and the following ones show somewhat of a similar tend- 

 ency. In two specimens the paired dorsal brown stripes may be traced 

 almost without break for the animal's entire length, and it is in one of 

 these that the median yellow stripe is interrupted at almost every 

 brown band. The posterior sucker is heavily pigmented dorsally, less 

 so or almost unpigmented ventrally. The marginal zone is pale, with 

 about fourteen dark and irregular brown rays extending toward it and 

 terminated by as many dark eye spots. 



mra. 



Length 19 



Breadth 1.8 



Length of anterior region 4. 



Length of head (above) 5 



Breadth of head 7 



Diameter of acetabulum 1.6 



Breadth of clitellum 1. 5 



Ty|;es.— No.4818, U.S.K.M. Arichat, Cape Breton, Nova Scotia; W. A. 

 Stearns, 1890, from lips of lamper eel {Petromyzon marinus). Four 

 specimens. 



i6. PISCICOLA RECTANGULATA Levisen. 



No. 4705, U.S.N.M. Alaska; Lieut. G. M. Stoney; "tish parasite."' 

 Eight specimens. 



17. PISCICOLA ANARRHICHiE. 



Ichthyobdella anarrhichcn Diesing. 



Ichthyohdella anarrhicha; van Beneden and Hesse. 



Not Flatijbdella anarrhicha' Malm. 



Piscicola marina Leuckart, 1849. 



Piscicola marina Gkube. 



Not P. marina Johnson. 



No. 3958, U.S.N.M. Point Barrow, Alaska. U. S. Signal Service; 

 J. Murdoch; gills of Lycodes. Twenty-six specimens. 



18. PISCICOLA RAPAX. 



Pontohdella rapax Yerrill. 



No. 5030, U.S.N.M. Menemsha Bight, Vineyard Sound, Massachu- 

 setts. U. S. Fish Commission, 1883 ; August 28 ; exterior of Pleuronectes 

 dentatus. Four sj)ecimens. 



PONTOBDELLA Leach. 

 19. PONTOBDELLA MURICATA (Linnaeus) Moquin-Tandon. 



No. 175, U.S.N.M. (no further data). One specimen. 

 No. 773, U.S.N.M. Cedar Keys, Florida; Henry Hemphill, Decem- 

 ber, 1883; from tongue of large shark. One specimen. 



