OF THE PLATES. 427 
The abdomen agrees in colour with the wings. From South 
America. Collection of Count Dejean. 
Fig. 3. Hgocera Boisduvalii, of the natural size, the third 
species of the genus that is known. Superior wings vinous- 
brown with three white bands; one extending along the whole 
inner margin, the other very short and proceeding from the 
edge, and the third likewise proceeding from the edge and de- 
scending obliquely near the external margin; four violet-grey, 
metallic spots. Posterior wings yellow with a lunula, and the 
extremity light-brown; thorax white with vinous-brown ptery- 
goda; abdomen yellow with a series of black points superiorly; 
antenne more slender than those of the Megocera venulia. From 
the western coast of Africa. Cabinet of M. Boisduval. 
Fig. 4. Coronis Durvillii, of the natural size. Superior sur- 
face of the upper wings olive-brown, with an oblique, serrated, 
whitish band near the middle; that of the base more or less 
violet, and the middle one slightly tinged with olive on the 
inner margin which alone is dentated; at the extremity, near 
the fringe, is a double greyish line, the external one denticu- 
lated; the posterior wings, terminated by a moderate tail, are 
somewhat spatulate, and present in the middle a band of bright 
violet-blue, very broad near the edge, and terminating ina point 
near the anal angle.- The under part of the whole four is of a 
pale-olive-brown with a white band on the middle of each, and 
the extremity of a UEIME NI ge grey. From Cayenne. Cabinet 
of M. Boisduval. 
s 
Plate III. 
Fig. 1, 2. An extraordinary species of Floriceps found in 
the liver of the Diodon Mola. It is enveloped in a membranous 
sac (fig. 1), which appears to be connected in some way with 
its body, and to enjoy the faculty of voluntary contractions. 
Fig. 5. The sac opened and the animal exposed. 
Fig. 4. The Chondracanthus of Laroche, and fig. 4, another of 
those parasites allied to the Caligi, which have been taken for 
Lernez, and which is from the Trigla. 
Fig. 5. Brachiella thynni. 
The other figures are sufficiently explained in the text, for 
which see their genera by Index, as well as those of the piste 
generally. 
Fig. 6 exhibits the filaments issuing from the anus. Its nu- 
merous tentacula must protrude through the opposite opening. 
