300 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
It agrees with Abeona minima in the peculiar dentition characteristic 
of that genus, as well as in the large seales and shortened fins. Its 
form is, however, quite different, resembling more the genera Brachyis- 
fius and Cymatogaster. It is a considerably larger fish than Abeona mi- 
anima; its dorsal spines are weaker and the number of fin rays is greater. 
(D. IX, 14; A. II, 16—in Abeona minima.) 
From Cymatogaster aggregatus it is widely separated by the different 
dentition; with Brachyistius frenatus Gill it has closer affinities, but the 
two species belong to different genera. 
This latter species has been but once observed, and no econ 
has been yet published, merely a brief note enumerating some of its 
peculiarities. We therefore subjoin a fuller account, drawn from a fine 
specimen obtained by us at Santa Barbara. 
BRACHYISTIUS FRENATUS Gill.* 
(Proc. Acad..Nat. Sci. Phila., 1862, 275.) 
Body elongate, compressed, the body proper regularly elliptical, with 
long caudal peduncle. Head long, very slender and pointed, much de- 
pressed above the eyes, the snout projecting. Mouth very small, ter- 
minal oblique, the small maxillary falling much short of the orbit. Lips 
rather thin, the lower with a frenum. Teeth long and slender, some- 
what lanceolate, few in number, arranged in a single series. 
Preorbitai broad. Cheeks with about two rows of scales; opercles 
with three. Eye large, anterior, about 3 in head. 
Gil-rakers numerous, long and slender. 
Seales large, 42 in the course of the lateral line. Dorsal spines high 
and rather strong, the first low, the others rapidly increasing to the sixth 
and seventh, the eighth shorter, the soft rays a little higher than the 
-highest spines. 
Caudal peduncle nearly as long as the head, not very slender. Caudal 
fin rather deeply forked. 
Anal spines feeble, the fin elevated in front. Ventrals reaching soft 
rays of anal. Pectorals reaching first anal spine. Ventral groove very 
short. 
DVL, To. A 22. 
Color dark See Saaroe above, with lighter stripes along the rows of 
scales. Below everywhere a brilliant light coppery red; each scale with 
a light blue spot and dark punctulations. Head colored like the body. 
Fins all light reddish, plain, the dorsal somewhat dusky. A streak of 
sky-blue spots below and in front of the eye. 
casurements of Abeona aurore 
Measurement Abeon Ore. 
Sena = 100 
“We have since obtained this species in very great numbers at various places along 
the coast from Los Angeles to Vancouver's Island. Ditrema. brevipinne Giinther is 
undoubtedly the same species. 
