Ill; 



C0TT0ID8 OF NORTH AMERICA. 



71 



Insertion of ventrals in advance of the anterior dor- 

 sal, near the lower edge of pectorals. 



Co<tllS formOSUS, Grd. — Body fusiform. 

 Tip of pectoral fins not reaching the anterior margin 

 of second dorsal. A second minute preopcrcular 

 spine, directed downwards. 



CottllS Fabricii, Grd. — Head having 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 preopcrcular, bent backwards and up- 

 wards as in Cotti. First dorsal fin lower than the 

 second. Teeth on the palatine bones. Skin beset 

 with minute prickles. 



CottopsiS asper, Grd. — Tip 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. 



TRIGIiOPSIS, Grd.— Head smooth. First 

 dorsal fin lower than the second. No teeth on the 

 palatine bones. Several radiating spines on the 

 edge of the preopcrcular. Skin smooth. 



Triglopsis Thompsonii, Grd. — First 



dorsal fiu separated from the second by a considera- 

 ble space. Second dorsal very elevated. Lateral 

 line extending from head to the base of caudal fin. 



radium porrectis. Pinnis ventralibus ante anterio- 

 rem dorsalem et prope inferiorem pectoralium mar- 

 ginem, insertis. 



CottUS formOSUS, Grd. — Corpore fiisiforme. 

 Extremitatibus pinnarum pectoralium non productis 

 ad anteriorem dorsalis sccundre marginem. Secuuda, 

 spina praeoperculari minuta deorsum directa. 



CottUS Fabricii, Grd. — Capite ad tubercula 

 habenda proclivi. Radii pinnarum dorsalium ct 

 pectoralium pluribus quam ulla specie hujus generis. 



COTTOPSIS, Grd. — Capite levi. Una 

 spina e prasoperculari, flexa retrorsum et sursum, ut 

 in Cottis. Pinna dorsali prima breviore secunda. 

 Dentibus in ossibus palatinis. Cute minutis aculcis 

 hirsuta. 



Cottop§is asper, Grd. — Extremitatibus pin- 

 narum pectoralium vix productis ad anteriorem se- 

 cunda3 pinnae dorsalis marginem. Pinna anali brevi. 

 Linea laterali non interruptii a capite ad pinnas 

 caudalis basim. 



TRICrliOPSIS, Grd.— Capite levi. Prima, 

 dorsali pinna breviore secunda. Dentibus ex ossibus 

 palatinis nullis. Spinis compluribus radiantibus ex 

 margine prseopercularis. Cute levi. 



Tri^Iopsis Thompsonii, Grd.— Pinn-a 



dorsali prima a secunda spatio alicjuanto sejuncta. 

 Pinna dorsali secunda altissima. Linea laterali a 

 capite ad basim pinnje caudalis porrecta. 



