734 ADDITIONS TO THE FAUNA OF LORD HOWE ISLAND, 



aa. Head without luminous glands. 



c. Lateral line continuous; jaws, vomer and palatines toothed; 

 eight branchiostegals ; dorsal fin continuous, deeply 

 notched; four anal spines; seven soft rays in the ventral. 



HoLOCENTRIDiE. 



cc. Lateral line interrupted ; jaws with a single series of 

 minute teeth ; four branchiostegals; dorsal fins widely 

 separated; three anal si)ines; five soft rays in the ventral. 



HoWELLIDyE. 



It is plain that in face of such important differences as these I 

 had no option but to establish a separate family for the reception 

 of Hotvella. 



HowELLA, gen.nov. 



Scales moderate, smooth except at the base, where there are 

 several series of short, ci-escentic strife, the middle denticulations 

 enlarged and spine-like. Lateral line doubly interrupted, the tube 

 simple and linear, occupying the entire exposed portion of the 

 scale. Head rather large, with short blunt snout. Jaws equal. 

 Maxillary exposed, scaly. Jaws with a single series of minute 

 teeth; vomer, palatines, pterygoids, and tongue toothless. Pre- 

 opercle feebly serrated; opercle with two basally adnate spines; a 

 very strong spine on the subopercle and a weaker at the posterior 

 angle of the interopercle. Gill-openings wide; gill-membranes 

 separate, free from the isthmus; pseudobranchiaj present; gill- 

 rakers well developed, compressed, lanceolate, smooth, in moderate 

 number. Dorsal fins with viii, i 8 rays, the spinous longer than 

 the soft; anal short, with iii 6 rays, the third spine the longest; 

 all the dorsal and anal spines very strong; soft dorsal and anal 

 covered nearly to the tip with large, thin scales; ventrals inserted 

 below the base of the pectorals, close together, with a strong 

 spine; pectorals pointed, with 15 ra3^s, the middle the longest. 



Etymology : — Named for the island where the specimen was 

 obtained. 



Distribution : — Lord Howe Island. 



