100 LABEIDJ2. 



The height of the body is one-fourth of the total length. Fore- 

 head protuberant, especially in large individuals, from an accumu- 

 lation of fat immediately above the eyes. Lips thick, fleshy. Teeth 

 on the intermaxiUaries and in the lower jaw alike, consisting ex- 

 ternally of a single row, stout and conical, of which the two anterior 

 pairs are much larger than the others and project forward ; within 

 this external row is a band of blunt, rounded teeth, scarcely pro- 

 jecting above the membrane. Pharyngeal teeth flat, tessellated, 

 tubercular. Operculum and suboperculmn scaly, prseoperculum 

 naked. Scales deeply imbedded, extending but slightly on the ver- 

 tical fins ; cutaneous flaps of the dorsal spines long. The length of 

 the ventral is one-seventh of the total ; caudal slightly concave. Dark 

 blackish-brown, anterior portion of the trunk sometimes red. 



Coast of San Diego (California). 



12. TROCHOCOPUS. 



Body oblong, covered with scales of moderate or rather small size 

 (L. lat. 45-62) ; head scaly, as long as, or longer than, high, with 

 the snout of moderate extent ; both limbs of the prseoperculum are 

 naked, not serrated. Lateral line continuous. Base of the soft 

 dorsal not scaly. Formula of the fins : D. i^. A. ■^. Both iaws 



J 10 12 « 



with four canine teeth anteriorly ; lateral teeth distinct ; a posterior 

 canine tooth. 



Indian Ocean. Galapagos Islands. 



1. Trochocopus opercularis. 

 D. i^. A. ^. L. lat. 45. 



10 12 



Head much longer than high, one-third of the total length (the 

 caudal fhi not included) ; snout produced, conical ; cheek with about 

 six series of small scales. Dorsal spines of moderate strength and 

 length, pungent, gradually becoming longer posteriorly. Uniform 

 yellowish (in a dried state), with a black spot on the end of the 

 operculum. 



Mam-itius ? 



a. Six inches long : stuffed : not good state. From Dr. Janvier's 

 Collection. 



2. Trochocopus darwinii. 



Cossyphus darwinii, Jenytis, Zool. Beagle, Fishes, p. 100. pi. 20. 

 Labrus aper, Valenc. in Voy. Venus, Zool. p. 338, Poiss. pi. 8. fig. 1. 



D.I|. A.I. L. lat. 62. 



Snout pointed ; head nearly as long as high ; prseoperculum with- 

 out serratui-e ; fins not scaly ; the soft dorsal and anal and the caudal 

 lobes produced into points ; scales on the cheek imbricate. Red, 

 with a large yellow spot above the pectoral, and with a black spot 

 anteriorly on the dorsal fin. 



Galapagos Islands. 



With a little attention, Valenciennes might have convinced him- 



