3158 
Bulletin yf/, United States A^atiouxl Museuni. 
aud opa()Ue in life. The otlier ( Lcthostole), typitied hy Chiroxioma extor, has 
tlie flesh thin, translucent, and very pale. There are correlated differences 
in the firmness of the hones and scales, Imt thus far we ha\ e foiiml no 
tangible character on which to separate Lethoatole as a genus from Chlros- 
ioma. The known species of Lethostole are extor, olhiim, chapahr, (jramlocule, 
promelas, cryxlalliinim, hnn<v, and ocoihnie. 
ll.>7 (a). KSLOPSAKI M A UG K, .lordaimt Snyder. 
Head depth 4^; depth of caudal ])edunclo 2f in head; eye .S3 ; snout 
3; interorbital space 3J; height of spinous dorsal 3>^; soft dorsal 2; 
anal 2; length of pectoral ventrals 24; caudal 1^; IJ. I\ -8; A. 15; 
P. 13; scales 40-11, 5 between the dorsals. Body rather thickset, its 
deepest part .just anterior to base of ventrals; width of bod.y equal to 
distance from posterior edge of orbit to tij) of snout; eye nearer to tij> of 
snout than to posterior edge of ojiercle by a distance equal to diameter of 
])upil; iuterorbital space convex; width of preorbital area equal to diam- 
eter of pupil; tip of lower jaw projecting beyond that of tipper; mouth 
large, oblique; lips not much thickened posteriorly, the lower not dis- 
tinctly folded over the upper at their angle; maxillary extending poste- 
riorly to a peiqtendicular passing through anterior etlge of orbit, its distal 
end below the level of eye; teeth large, sharp, projecting backwards, in 
2 definite rows on each jaw, none on vomer or palatines ; gill-rakers on 
first arch 14, long and slender; air-bladder extending posteriorly to a 
])oint a little past insertion of anal; peritoneum black; vertebra- 37. 
Lateral line represented on the fifth row of scales below the dorsal by a 
series of partly developed pores; scales large, entire, covering head and 
body except snout, lower jaw, preorbital area, and a small space around 
base of pectoral; small scales extending for a short distance on inter- 
radial membranes of caudal; first 3 dorsal spines of about the same 
height, the fourth shorter; first dorsal ray longest, the others gradually 
shorter; edge of lin straight; anal inserted on a perpendicular, ]>assing 
halfway between dorsals, its first ray longest; edge of fin slightly con- 
cave; caudal notched, the tips and notch rounded, extending to bases of 
ventrals; ventrals falling short of vent a distance equal to diameter of 
orbit. Color in life, trau.slucent ; a silvery lateral band with its upper 
edge dark, extending from upper part of base of jiectoral to base of 
caudal, the band less distinct in the region of the jiectoral tin; scales of 
back edged with fine, dark specks; snout, lower jaw, top of head, and 
upjter ])art of eye dusky; dorsal and caudal fins with a little dusky 
coloring. 
S]>ecimens of arye were caught in the same seine-haul with E, Jordaui. 
The former species dift’ers from the latter in having a thicker body, a 
longer snout, a larger and less oblitine mouth, a larger e.ve, and a wider 
color band. 
In the drawing accompanying the original tlescription of Kxlopxarum 
jordatii the mouth is wrongly represented. Of the specimens examined, 
including some of the types, the mouth is much like that of ('hiroxtoma 
hitmhohUiainim. The cleft is not straight in outline. The lower lip folds 
over the upper at their union. (.Jordan A Snyder.) (urt/e, silvery.) 
