EARVAL AND POST-LARVAL FISHES—REGAN. 147 
Bothinae (Platophrinae). 
Bothus ocellatus, Agass. 
A specimen of 26 mm. is still externally symmetrical and is extremely similar to 
the example of B. podas figured by Kyle (t.c. p. 98, fig. 16). I count 86 dorsal and 
59 anal rays and 38 (10 + 28) vertebrae. . 
Station 53. Tropical Atlantic. 5°S., 27°15’ W. 2 metres. May 12th, 1913. 
CYNOGLOSSIDAE. 
Symphurus plagusia, Bl. Schn. (Pl. IX, figs. 5, 6). 
Dorsal 90-95 ; Anal 70-75 ; Caudal 10 ; Vertebrae 49 (9 + 40). 
Two examples of 6 to 7 mm. are rather similar to S. /actea of this size described 
and figured by Kyle (t.c. p. 132, pl. 1v, figs. 41-42), but the abdominal appendix is 
lacking, and the distribution of the pigment is somewhat different. A specimen of 
11 mm. has already metamorphosed, showing that the change takes place at a smaller 
size than in the European species. 
Stations 39, 40. Six miles off the mouth of Rio de Janeiro Harbour. 2 metres. 
April 27th, 1913. 
PLECTOGNATHI. 
BaALisTIDAE. 
Monacanthus scaber, Forst. (Pl. X, fig. 3). 
A post-larval specimen 5 mm. long. The head is large; the external bones are 
spinate. The posterior dorsal and anal rays are not fully formed, but the total number 
exceeds 30. The considerable length of the tail posterior to the permanent caudal fin 
is worth notice. 
Station 133. Spirits Bay, near North Cape, New Zealand. 20 metres. August 
30th, 1911. 
DIODONTIDAE. 
Diodon sp. 
A young fish, 5 mm. long. 
Station 92. 24 milesS. by W. from Three Kings Islands. Surface. July 27th, 1911. 
PEDICULATI. 
CERATIIDAE. 
Ceratias sp. (P]. X, fig. 1). 
Two examples, 6 mm. in length, are in many respects similar to the adult fish. 
There are 4 dorsal, 4 anal, and 9 caudal rays; an interorbital papilla represents the 
- illicium. The mouth is nearly vertical and there are pointed teeth in the jaws. 
Station 311. South Atlantic. 35° 29’S.,50°26’W. 2 metres. April 22nd, 1913. 
