III. 



COTTOIDS OF NOKTH AMERICA. 



71 



Insertion of ventrals in advance of the anterior dor- 

 sal, near the lower edge of pectorals. 



ColtUS fbrmosns, Grd. Body fusiform. 

 Tip of pectoral fins not reaching the anterior margin 

 of second dorsal. A second minute preopercular 

 spine, directed downwards. 



CottllS Fabric!!, 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 preopercular, 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. 



TRIGI^OPSIS, 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 Thompson!!, 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. 



radium porrectis. Pinnis ventralibus ante anterio- 

 rem dorsalem ct prope inferiorem pectoralium niar- 

 ginem, insertis. 



CottllS fbrmOSUS, Grd. Corpore fusiforme. 

 Extremitatibus pinnarum pectoralium non productis 

 ad anteriorem dorsalis secundae marginem. Secunda 

 spina prasoperculari minuta deorsum directs. 



CottllS Fabric!!, Grd. Capite ad tubercula 

 habenda proclivi. Radii pinnarum dorsalium et 

 pectoralium pluribus quain ulla specie hujus generis. 



COTTOPSIS, Grd. Capite levi. Una 

 spinS, e praeoperculari, flexa retrorsum et sursum, ut 

 in Cottis. Pinna dorsali prinia breviore secunda. 

 Dentibus in ossibus palatinis. Cute minutis aculcis 

 hirsuta. 



Cottopsis asper, Grd. Extremitatibus pin- 

 narum pectoralium vix productis ad anteriorem se- 

 cundje pinnae dorsalis marginem. Pinna anali brevi. 

 Lined lateral! non interrupts, a capite ad pinnae 

 caudalis basiin. 



TRICrLOPSIS, Grd. Capite levi. Prima 

 dorsali pinna breviore secunda. Dentibus ex ossibus 

 palatinis nullis. Spinis compluribus radiantibus ex 

 margine prajopercularis. Cute levi. 



Thompson!!, Grd. Pinna 



dorsali prinia a secunda spatio aliquanto sejuncta. 

 Pinna dorsali secunda. altissimst. Linea lateral! a 

 capite ad basim pinnae caudalis porrecta. 



