CAPSALA. NITSCHIA. 33 



(«) Berwick Bay, Dr. Johnston. 



(b) Ireland, BriL Mus. 



(c) No locality nor name attached. 



3. CAPSALA, Bosc, 1811. 



Capsala, Blainville in Diet, des Sc. nat. Ivii. 568. Moquin-Tandon, 



Monogr. 395. 

 Tristome, Cuv. Rhgn. Anim. iii. 265. Baer in Nov. Act. Curios, xiii. 



675. 

 Tristomum, Dlesing, Syst. Helm. i. 42S. 



Char. Body suborbicular or oblong, flat : head with two subor- 

 bicular marginal or frontal bothria : mouth anterior, between the 

 bothria : sucker inferior, sessile, saucer-like, seven-radiated, with a 

 small central disc : female aperture below the mouth : male organ 

 filiform, behind the vulva on the left side of the body. 



1 . C. rudolpMana, suborbicular, emarginate behind, foveolate un- 

 derneath ; bothria frontal, suborbicular ; sucker with a membranous 

 plaited margin. Length 5-9'" ; breadth 5-10'". 



Tristoma coccineum, Rudnlphi, Syn. Enfoz. 12.3 & 428. tab. 1. f. 7, 8. 



Yarrell, Brit. Fish. ii. 353 ; 2nd edit. ii. 468, vign. IV. Tho?npson 



in Ann. 8f Mag. Nat. Hist. xx. 175. 

 Phylline coccinea, Schweig. Handb. 474. 

 Capsala coccinea, Blainv. Diet, des Sc. nat. Ivii. 569, Atlas, f. 11. 



Moq.-Tandon, Monogr. 396. 

 Tristoma molje, E. Blanchard in Ann. des Sc. nat. viii. 326 (1847). 

 Tristomum rudolphianum. Dies. Syst. Helm. i. 429. 



Hab. On the short Sun-fish (Orthagoriscus mola), not confined to 

 the gills, on which I have not found them. They adhere to every 

 part of the skin. 



4. NITSCHIA. 



Nitzchia, Baer in Nov. Act. Curios, xiii. 675 (1826). Diesing, Syst. 



Helm. i. 425. Blainville in Diet, des Se. nat. Ivii. 567. 

 Nitschia, Moq.-Tandon, Monogr. Hirud. 393. 



Char. Body oblong, flat : head continuous with the body and 

 furnished with two oblique linear marginal bothria : mouth between 

 the bothria, frontal : sucker sessile, cupped, with an inflected crenu- 

 late rim and a small central disc : female aperture beneath the 

 mouth : penis filiform, below the vulva. 



] . N. elegans. 



Nitzchia elegans, Baer in Nov. Act. Nat. Curios, xiii. 660. tab. 32. 



f. 1-4. Dies. Syst. Helm. i. 426. Blainv. lib. cit. Ivii. 568. 

 Capsala elongata, Nordmann in Lam. An, s. Vert. 2de edit. iii. 602. 



Baird, Entoz. Brit. Mus. 42. 



