3180 
Bulletin ^ 7 , United States National Musenm. 
obli()ue rows, none below lateral line. Minute pointed teeth on Jaws, 
Yomer, and palatines: Jaws Snbeqnal, mouth horizontal, the maxillary 
reaching a vertical below the anterior edge of impil. Margin of i)ie- 
opercle armed with one sharj* spine curved upward, below which are 1 
and sometimes 2 very short blunt i>rocesses; margin of opercle ending 
dorsally in a pointed flap. Branch iostegals (3, the membranes liroadly 
united, free from the isthmus; no slit behind the last gill. Dorsal tins 
not Joined, the soft dorsal very large; first dorsal beginning slightly in 
advance of opercular flap, the upper edge much rounded, the tiftli spine 
being longest; origin of soft <lorsal Just in front of origin of the anal 
in the female, directly above it iu the male, the fin very long; pectoral 
large, reaching a vertical below ninth ray of soft dorsal; origin of ven- 
trals posterior to a point midway between anal and base of jtectoral in the 
male, anterior to it in the female, the difference cau.sed by the enlarge- 
ment of first 2 anal rays in the male; anal flu small, the rays slender, 
the membranes of all deeply emarginate; the first 2 anal rays of male 
greatly enlarged. Joined l>y membrane to each other and to the rest of 
the fin; the posterior edge of tail nearly straight; anal papilla incon- 
spicuous. Cirri small and scarce, always occurring singly, never in 
bunches or Joined at the Ijase, with the exception of a few jiairs along the 
anterior third of the lateral line; one above each orbit, 2 rows of 3 each 
behind these on toji of head, 1 cirrus on the inside of each nasal spine; a 
cirrus on the end of maxillary, 2 or 3 on the margin of the jtreopercle 
below the preopercular spine, and a row along the anterior half of the 
lateral line. Color, light olive or reddish brown tinged with lavender, 
marked dorsally with 4 or 5 wedge-shaped, indented sjiots of black, a 
broken baud of same color along the lateral line, sometimes sending 
branches below it which show a tendency to inclose round spots; a more 
or less distinct sj)ot of black on top of the head: a faint ])ostocular line, a 
spot below the eye, and a preopercular line running from eye to snout, all 
of same color; ])ectoral and caudal indistinctly barred with brown, anal 
tinged with it, and the dorsal covered with line brown or black spots 
sometimes very faint; throat and belly pale yellowish white, unsjiotted. 
This species is most closely related to Oxjicotins emhrtium, with which it 
agrees in general coloration, but dift'ers decidedly in the j)resence of scales, 
the slenderer body, the larger number of soft dorsal and anal rays, the 
serrated margin of the preoj)crcle, and the arrangement of the cirri. 
Rare; only 2 other specimens from Point Lobos, California, are known 
to us. It inhabits the tide-pools lined with corallines, and in its colora- 
tion imitates very closely these alga*. Length 40 mm. The smallest of 
our tide-pool fishes. (Greeley.) (rimus, a crevice; rimenais, living in 
crevices.) 
Itutciculus rimennis, Greeley, Bull. T. .S. Fish Coni. 1899 (Dec. 13, 1899), 13, (if;. 3, 
Point Lobos, Monterey County, Cal. (Type, Xo. 0067, L. S. .7r. Unir. Mus. Coll. 
A. W. Greeley.! 
746 (b). DIALARCHUS, Greeley. 
IHalarchns, Greeley, Btdl. F. S. Fish Com. 1899 (Dec. 13, 1899), 14 (tnitdcri). 
Preopercular sjiine forked at tiji; sialcs none; first anal ray of male 
enlarged. Joined to the secoml, the two wiilely separated from the rest of 
