1899.] PABASITIC OOPEPODA OK TISHES, 481 



LeryuBoeera esocina M.-E. Hist. Nat. Crust, iii. 1840, p. 527, 

 pi. xl. figs. 13, 15. 

 ti eyprinacea M.-E. op. cit. 1840, p. 527, pi. xl. fig. 16. 



„ esocina Herm. Naturforscher, xix. 1783, p. 44, pi. ii. 



%. 6. 

 „ „ C. Claus. Zeitschr. gesammt. Naturwiss. xxxi. 



1868, p. 530. 

 „ „ Eichiardi, Atti Soc. Toscana di Sc. Nat. iii. 



1876. 

 Hosts : Carp, Perch, Eoach, &.Q. 



(2) Leen^oceea cruciata. 2 . 



Lernceocera cruciata Lesueur, Journ. Ac. Philad. 1824, iii. p. 286, 

 pi. xi. fig. 4. 

 „ ,. M.-E. Hist. Nat. Crust. 1840, iii. p. .527. 



„ ,, Eichiardi, Atti Soc. Toscaua di Sc. Nat. iii. 



1876. 

 Host : Cichla cenea, Les. Lake Erie. 



(3) Leek^oceea phoxinacea. 2 . 



Lernceocera ])hoocinacea KUr. An. Mus. Wien. 



Kr. Bidrag til Kundskab, 1863, p. 325, 

 pi. xviii. fig. 3. 

 Host : Phoxinus marsilii [Leuciscus phoxinus]. 



(4) Leen^ocera lagenula. $ . 



Lernceocera lagenula Heller, Eeise d. No vara, 1865, p. 246, 

 pi. xxiv. fig. 9. 

 Host :— ? Brazil. 



(5) LeESTjEOCEEA pomotidis. 2 . 



Lernceocera jiomoticlis Kr. Bidrag til Kundskab, 1863, p. 323, 

 pi. XV. fig. 5. 



Host : gills of Pomotis sp. New Orleans. 



(6) Leen^ocbra gasteeostei. 2 • 



Lernceocera gasterostei, Briihl, Inst, d Univ. Pest. 200, 1860, 

 „ „ Heller, Eeise d. Novara, 1865, p. 246. 



Host : Gasterosteus aculeatus. 



(7) Leen^oceea catostomi. 2 • 



Lernceocera catostomi Kr. Bidrag til Kundskab, 1863, p. 321, 

 pi. xviii. fig. 4. 



Host : Catostomus macrolepidoius, Les. Mississippi. 



G. 2. Theeodamus Kroyer. 



Head rounded, without horn-like appendages ; mouth opening at 

 the base of the long slender neck. Thorax much elongated, indis- 



