Gelatinous points disposed in a single semicircular row. Colour pale blue, with two lateral fillets of rosaceous tubercles; base of the dorsal fin yellow.
3. F. Forskalia. Body with a vermiform organ; and a cup on the dorsal fin. No caudal appendage. Plate I. fig. 3. represented in the act of devouring a species of the genus Cymodora of Peron and Le Sueur.
Body cylindrical, subequal, with a dorsal groove. Colour pale violaceous, a later row of rosaceous tubercles, double before. Cup resembling a small basket, with four radical threads passing between the muscles of the fin; fin somewhat elongated behind. Gelatinous points, disposed as in the first species.
4. F. Cuviera. Body destitute of the vermiform organ and cup. Tail with an appendage (F. Cuviera. Peron and Le Sueur; Annales du Museum d'Histoire Nat. t. 14. p. 218, and t. 15. p. 57. Pl. 2. fig. 8.) Plate I. fig. 4.
Body subequal, larger and transversely wrinkled before; with a dorsal groove. Colour pale violaceous; tubercles rosaceous, irregularly disposed; one on each side of the dorsal fin larger and transverse, with two longitudinal ones placed upon the tail. Gelatinous points eight; four in a transverese line, surmounted by four others in two transverse lines.
5. F. Frederica. A cup on the dorsal fin, and caudal appendage. Vermiform organ none. Plate I. fig. 5.
Body very much resembling that of F. Cuviera.
6. F. Peronia. A vermiform organ, cup on the dorsal fin, and caudal appendage. Gelatinous points none. Plate I. fig. 6.
