410 APPENDIX. No. IV. 
dorsal fin, with the first ray thick striated without teeth, caudal fin with 
lanceolate laciniz. 
Ozs. ‘The front of the head is obtuse and rounded ; the upper part is 
irregularly sulcated, and the vertex is striated: the striz being disposed 
in rays; the mouth is large; the filaments of the nostrils are very 
short, and those of the angles of the mouth are a third Jonger than 
those of the chin. The hinder dorsal fin is short and not very 
fleshy. 
Sp. 3. Oxyrhynchus deliciosus. The scales concentrically sculptured, the dorsal 
ones rounded; those of the sides and belly very broad, the teeth linear 
acuminated behind and before. 
Ozs.:'This animal is doubtless reforahle to the genus Oxyrhynchus of 
Atheneus.* It differs from its congener Momyrus anguilloides (Geoff: 
Poiss. de Nil. pl. vit.) in the form of its scales, (which in that species 
are of the same size and form on all parts of the body) and in the shape 
of the dorsal fin, which in O. deliciosus is more acute in its hinder 
upper edge. This fish is very common in the river, and its flesh is of 
a most exquisite flavour. 
CrPrHaLoropa.- 
Of this class one new genus, and six new species were discovered; four of 
which are figured in the annexed plate. 
Genus I. OcyTHoE. Sp. 1. Ocythoé Cranchii, of which a description is given 
in Appendix, No. III. 
Genus II. Crancuta.t Body oval, sack-shaped: fins approximating, their 
extremities free: neck with a frenum behind, connecting it with the sack, and 
with two other frena connecting it with the sack before. 
Sp. 1. Cranchia scabra. Sack rough, with hard rough tubercles. 
Sp. 2. Cranchia maculata. Sack smooth, beautifully mottled with distant Bre 
spots. 
, 
© Deipnos, lib. iii. 116; vill. 356; vii. 312. 
+ For asynopsis of the genera of this class see Zoological Miscellany, vol. iii. 
; The localities of the two species sent home were unfortunately lost. 
