204 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxiv. 
ridges. The supraorlntal rim separated from central portion of inter- 
orbital space by a depression. Head with rows of small, sharp, and 
tooth-like spines, as described for the genus. 
0|3ercles with three or four large scales, and cheeks and suborbital 
region with scales. Scales on body with entire edges. About 16 
scales in the median series in front of dorsal. Second .dorsal originat- 
ing nearly above middle of anal, and extending a little posterior to it. 
Front of spinous dorsal before front of soft dorsal a distance contained 
li in head. Pectoral reaching to above middle of ventrals. Origin of 
ventrals midway between the vertical from middle of eye and front 
of anal. Vent near front of anal. ■ 
Color slaty, no silvery apparent except a trace at opercles. Scales 
Fig. 3.— .\therion elymus. 
of back each with a large blackish spot. Top of head and snout black. 
Lateral edge of lower jaw black. A black lateral stripe on third and 
part of fourth rows of scales, growing broader at about its middle, 
thence narrower at caudal peduncle and again expanding at base of 
caudal tin, somewhat involving base of caudal raj^s. Fins without 
color, except caudal, which is slight!}^ dusk3\ 
The largest specimen is 38 mm. in length. About a dozen specimens 
were taken in tide pools at Misaki, Sagami, Japan. The species seems 
to reach only a ver}" small size. 
The type here described is about 33 mm. in entire length, and is 
numbered 6528 on the register of the Leland Stanford Junior Uni- 
versity Museum. 
{Elymus., rj^e-grass, from the rough head: sXv^og, a quiver). 
ISO Jordan and Starks, new genus. 
Body elongate, strongh^ compressed, deepest at nape, anteriorly 
scaleless. Breast compressed to an edge. Belly with a thick, sharp, 
ileslw fold of skin, at least in the male. Vertebrje about 43. Head 
short and blunt. Mouth small, oblique. Premaxillaries protractile 
but not movable. Pseudobranchiaj present. The gills, except the 
first, which is free from the second, are separated onl}' b}^ a short 
slit at the angle. Last gill with a slit behind it. Gill-rakers slender, 
about 4+ 13 in number. Gill membranes separate and free from the 
isthmus. Scales entire. First dorsal well separated from the second. 
