III. 
Insertion of ventrals in advance of the anterior dor- 
sal, near the lower edge of pectorals. 
Cottus formosus, Grd.— Body fusiform. 
Tip of pectoral fins not reaching the anterior margin 
of second dorsal. A second minute preopercular 
spine, directed downwards. 
Cottus Fabricii, Grd.— Head haying a 
tendency to become tuberculous. First dorsal and 
pectoral fins composed of several rays more than 
in any other species of the genus. 
COTTOPSIS, Grd.—Head smooth. One 
spine on the preopercular, bent backwards and up- 
First dorsal fin lower than the 
Skin beset 
wards as in Cotti. 
second. Teeth on the palatine bones. 
with minute prickles. 
Cottopsis asper, Grd.—tTip of pectoral fins 
reaching scarcely the anterior margin of the second 
dorsal. Anal fin low. Lateral line extending unin- 
terruptedly from head to base of caudal fin. 
TRIGLOPSIS, Grd.—Head smooth. First 
dorsal fin lower than the second. No teeth on the 
palatine bones. Several radiating spines on the 
edge of the preopercular. Skin smooth. 
Triglopsis Thompsonii, Grd. — First 
dorsal fin separated from the second by a considera- 
ble space. Second dorsal very elevated. Lateral 
line extending from head to the base of caudal fin. 
COTTOIDS OF NORTH AMERICA. 71 
radium porrectis. Pinnis ventralibus ante anterio- 
rem dorsalem et prope inferiorem pectoralium mar- 
ginem, insertis. 
Cottus formosus, Grd.—Corpore fusiforme. 
Extremitatibus pinnarum pectoralium non productis 
ad anteriorem dorsalis secundxe marginem. Secunda 
spina preeoperculari minuté deorsum directa. 
Cottus Fabricii, Grd.—Capite ad tubercula 
habenda proclivi. Radii pinnarum dorsalium et 
pectoralium pluribus quim ullé specie hujus generis. 
COTTOPSIS, Grd.—Capite levi. Una 
spina e preoperculari, flexa retrorsum et sursum, ut 
in Cottis. Pinna dorsali prima breviore secunda. 
Dentibus in ossibus palatinis. 
hirsuta. 
Cute minutis aculeis 
Cottopsis asper, Grd.—Extremitatibus pin- 
narum pectoralium yix productis ad anteriorem se- 
cundze pinne dorsalis marginem. Pinna anali breyi. 
Linea laterali non interrupté a capite ad pinne 
caudalis basim. 
TRIGLOPSIS, Grd.—Capite levi. Prima 
dorsali pinna breviore secunda. Dentibus ex ossibus 
Spinis compluribus radiantibus ex 
Cute levi. 
palatinis nullis. 
margine preeopercularis. 
Triglopsis Thompsonii, (rd—Pinna 
dorsali prima’ a secunda spatio aliquanto sejuncta. 
Linea laterali a 
capite ad basim pinnze caudalis porrecta. 
Pinna dorsali secund4 altissima. 
