PROCEEDINGS OF UNITED STATES, NATIONAL MUSEUM. 289 
a pair of distinct spinous ridges in front of the occipital ridge; present 
in one species only—auriculatus. Nuchal: close behind the occipital ; 
in one species (serriceps) large and distinct, in the others either wanting 
or often coalescent with the preceding. 
_ Two suprascapular spines are present in all the species except auricu- 
latus, which has three on each side. 
The following table gives the names of the spinigerous ridges on the 
top of the head usually present in each species, beginning with those in 
which the ridges are least elevated: 
Pairs 
Pema BEEOCHLaY, OCCIDUUAL. 2.5. 556 c- nine oo Sele aee no eincincescecassnce te 2 
JD" Gs TESS Dobie 2p gS One aoe SES Sere ae SOR a hee i eA 1 
EEE ee AN Ata) PLCOCULAT = 22:m (2). o> 5.5 cinte. eos stain ess <e os veceenlsecisen ean 1 or 2 
UTM S ee ASM eeeaetcctelcalcleSs sninieasine cic cins ss cis\aliscewlscua seeces sossusSecuce = 1 
Ovalis, nasal, preocular, supraocular, postocular, tympanic, aad occipital ...... 6 
Pinniger, nasal, preocular, supraocular, postocular, tympanic, occipital.----.-. 6 
Atrovirens, nasal, preocular, supraocular, occipital, and sometimes tympanic... 4 or 5 
Elongatus, nasal, preocular, supraocular, tympanic, occipital............------ 5 
Rastrelliger, nasal, preocular, supraocular, tympanic, occipital ---..-..---.-.-- 5 
Auriculatus, nasal, preocular, supraocular, tympanic, coronal, occipital, and 
CELE MBMLC tall eee einem sachs icieak- cc) s H/o) Se\sfecinisiclere cee en jecemes we watone 7 
Vexillaris, nasal, preocular, supraocular, occipital, and sometimes tympanic ... 4 or 5 
Chlorostictus, nasal, preocular, supraocular, postocular, tympanic, occipital --.- 6 
Rubrivinctus, nasal, preocular, supraocular, tympanic, occipital...-.....--.-.-- 5 
Rosaceus, nasal, preocular, supraocular, postocular, tympanic, occipital -..--.. 6 
Constellatus, nasal, preocular, supraocular, postocular, tympanic, occipital. -.--. 6 
Nebulosus, nasal, preocular, supraocular, tympanic, occipital ...-.....---.----- 5 
Ruber, nasal, preocular, supraocular, postocular, tympanic, occipital ......---- 6 
Fasciolaris, nasal, preocular, supraocular, tympanic, occipital....-..---.-.---- 5 
Serriceps, nasal, preocular, supraocular, tympanic, occipital, nuchal -..---..---- 6 
Nigrocinctus, nasal, preocular, supraocular, postocular, occipital ..--...----. -- 5 
The character of the gill-rakers has been hitherto unnoticed. In this 
regard the species may be grouped as follows: 
1. Long and slender: flavidus, simulans, ovalis, pinniger, melanops, atro- 
virens. 
2. Long and rather strong: vevillaris, elongatus, chlorostictus, rosaceus. 
3. Stout and rather short, usually not clavate, but constricted toward 
the tips: rubrivinctus, auriculatus, constellatus, ruber. 
4. Stout, short, compressed, and clavate: nebulosus, fasciolaris, serri- 
ceps, nigrocinctus. 
5. Very short, broader than high: rastrelliger. 
SEBASTICHTHYS ATROVIRENS sp. nov. 
Allied to 8. pinniger. Body oblong, not very stout, not tapering 
rapidly backward. Head moderate, rather pointed, its upper outline 
with a slightly curved slope from the snout to the nuchal region. 
Mouth moderate, not very oblique, the lower jaw little projecting, the 
rather slender maxillary extending to the posterior border of the pupil; 
the premaxillary below the horizon of the pupil. Maxillary largely 
scaly. Eye large, about three and a half times in length of head. 
Proe. Nat. Mus. 80-19 Sept. 28, 1880. 
