1018 The American Naturalist. [December, 
IX. EPIBDELLA Blainv., 1828: — 
23. E. Ishikaxwae n. Sp., gills of Lethrinus sp.? ; 
E. ovata n. sp., gills of Anthias Schlegelii ; 
25. 7. LERNEN rahi gill-plates of Aistiophorus sp. ; 
26. T. ovale n. sp., oral cavity of H. orientalis, H. sp., and? Cybium ; 
27. T. rotundum n. sp., gills of Aiphias gladius ; 
28. 7. foliaceum n. sp., gills of gen. sp. (Japanese Hazara); 
T. Nozawae n. sp., fins of. Thynnus sibi; 
30. T. Biparasiticum n.sp., carapace of a copepod (Parapetalus) and gills of. Thynnus 
albacora. 
It is somewhat striking that of all the thirty Japanese species de- 
scribed, the author does not consider a single one identical with any 
forms heretofore mentioned, but when one looks at the magnificent 
anatomical work contained in this volume he certainly feels very far 
from calling specific determinations into question. 
Several points in Goto’s interpretation of anatomical and histolog- 
ical structures are worthy of special notice: — 
1. The prismatic, refractive fibres, which constitute the wall of the 
suckers in the genera Amine, Microcotyle, Octocotyle, Diclidophora, 
Hexacotyle and Onchocotyle, are usually looked u pon as muscular fibres, 
but Goto agrees with Wright and Macallum (in Spyranura) in con- 
sidering these fibres more of a non-contractile supportive, connective 
tissue nature. . 
. The penis “is to be regarded as formed by an elevation of the 
wall of the genital atrium around the opening of the vas deferens 
and a simultaneous displacement of the latter from the base of the 
penis towards its top; so that the cavity of the penis is morphologi- 
. cally speaking as much the external surface of the body as the genital 
atrium, and the prostate glands are therefore to be regarded as a special 
modification of the dermal glands,—a view clearly in accordance with 
some facts observed [by -Haswell] in Temnocephala." 
3. Agreeing with Looss, Goto considers the vagina of the Cestoda 
homologous with the uterus of the Trematoda. Laurer's canal of the 
igenea is homologized with the genito-intestinal canal of the ecto- 
parasitic Trematoda, the receptaculum vitelli of Aspidogaster and 
the “anterior blind vagina" of Amphilina. While Looss looks upon 
the uterus of the Cestoda as homologous with the Laurer’s canal of 
distomes, Goto homologizes the uterus of the Cestoda with the vagina 
of the monogenetic Trematoda. These homologies are discussed at 
length and are diagrammatically figured on Pl. XXVII. 
For important and interesting discussions of other histological and 
anatomical structures we must refer to the original work, 
b " 
W. STILES. 
