894 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
only; gill-rakers moderate, rather slender; third to sixth dorsal spines greatly produced, ex- 
tending far beyond the membrane; the fourth highest, more than one-third length of body; 
first and second spines very short; soft dorsal naked; caudal fin slightly lunate, about half as 
long as head; ventral shorter than pectoral, which is 2^ in head; color greenish gray above, 
with darker clouds or obscure cross-bands, which disappear in spirits. Head 2i in length; 
depth 3| to 4. D. X, 12; A. Ill, 7. Scales, 9-63-22 Agassizii, 75. 
75. CRATINUS AGASSIZII. 
Cratinus agassizii Steindachner, Ichth., Beitr., VH, 19 (Galapagos Islands). 
Habitat. — Galapagos Archipelago. 
Etymology . — Named for Louis Agassiz. 
We have examined two specimens of this singular species, collected by the Alba- 
tross at Charles Island, one of the Galapagos. The largest is about 18 inches long. 
The posterior half of the body resembles that of the species of Paralabrax ; the long, 
low head suggests Philypnus. 
Genus XIX.— DULES. 
Dules Cuvier, R^gne Animal, Ed. II, 1829 {auriga). 
Type. — Dules auriga Cuv. & Val. 
Etymology,* Aouio<;, a slave, the fish being under the lash of the long dorsal spine. 
This genus contains but a single known species. It is very close to Prionodes, 
from which it differs in the presence of but six branchiostegals, and in the whii)-like 
prolongation of the dorsal spine. It also bears considei’able resemblance to Centropris- 
tis. Most of the species referred by Cuvier and Valenciennes to Dules belong to the 
genus Kuhlia Gill {— Moronopsis Gill = Paradules Bleeker). 
ANALYSIS OF SPECIES OF DULES. 
a. General form of Centropristis ; branchiostegals 6, the first being obsolete ; body rather deep and com- 
pressed, somewhat as in Hgpoplectrus, but less deep; anterior profile steep and nearly straight; 
mouth rather small, the lower jaw protruding; preorbital rather narrow, as broad as pu 2 )il; top 
of head naked; the frontal area large and well defined, broader than long; occipital crest low 
and short, shorter than the frontal area, the cranium much as in Paracentropristis hepatus ; 
teeth small, with no marked canines; gill-rakers rather short and slender, x -f- 9; maxillary 2f 
in head; eye 3^ ; snout 4. Scales large, those above in series parallel with the lateral line ; scales 
on breast small ; third dorsal spine extremely long, reaching beyond middle of soft dorsal ; other 
spines all short and even ; soft dorsal moderate, a little scaly at base ; dorsal not notched ; 
caudal truncate ; second anal spine 2f in head, as long as third, and a little stouter ; pectoral 
in head. Coloration in spirits, brownish; a dark area from front of anal up to soft dorsal; 
before this a whitish area, upper parts with dark streaks along the rows of scales, these faint 
and not continuous ; a dark baud upward from middle of base of ventrals; fins clouded. Head, 
2fin length; depth, 2|. D. X, 13; A. Ill, 7. Scales, 49. Auriga, 76. 
* Par ce nom de doules {esclave) nous avons voulu indiquer la ressemblance de ces poissons avec 
ceux que depuis longtemps nous avons appelds therapons, nom qui lui-m6me, assez arbitraire, n’est 
que la traduction de Fdpith&te donn6e a I’espece de thdrapon ddcrite le plus anciennement (I’Holocen- 
trus servus de Bloch). — Cuv. & Val., Ill, 111. 
