674 PLAGIOSTOMATA OF THE PACIFIC, 



procured by Mr. Ramsay from the Chinese Court at the Inter- 

 national Fisheries Exhibition in London, in the year 1884. The 

 specimen is a young female, and has the characteristic specific 

 marking, as is the case with the young of all the species, very 

 distinct. 



The head difiers but slightly from that of H. japonicus. The 

 teeth could not be very satisfactorily examined without a lateral 

 incision through the cheek, which, as the specimen is unique, could 

 not be permitted, but the anterior teeth and a portion of the lateral 

 pavement-like teeth were quite visibly through the orifice of the 

 mouth. 



The front teeth are each armed with 5 cusps; the three middle 

 cusps are the largest, but the exterior ones, though small and 

 obtuse, are quite distinct (fig. 4. j The centre rows of these front 

 teeth have the central cusp large and perpendicular, while in the 

 lateral rows, it is, in proportion to the other cusps, smaller and 

 recumbent. (Fig. 5.) 



In the extreme lateral row on each side of these front teeth the 

 united cusps take the form of a longitudinal crest. The lateral 

 pavement-like teeth are narrow, and show a median longitudinal 

 line," In the upper jaw the cuspid teeth are in 15 rows, the lateral 

 in four ; in the lower jaw, 11 of the one and 4 of the other. 



Nasal flap long. The upper labial fold covering partly the 

 lower fold, turns round the corner of the mouth, and enclosing the 

 lower labial fold, forms a second lower fold, of which only a margin 

 is visible. This peculiarity is seen where the upper fold is turned 

 up as in fig. 7. These folds are thin skinned and with thinly 

 scattered tentacles. 



The dorsal fins are very falcate, the first about double the size of 

 the second; the spines are large, acutely pointed, and sword-shaped, 

 the sides being very flat and compressed and prominently 

 ridged on the dorsal edge ; the anal fin is small and falcate ; 

 the caudal is longer and more falcate than in H. japonicus. 

 The colour is a pale brownish-yellow, with numerous bars of dark 

 brown disposed in alternate broad and narrow bands from the snout 

 to the extremity of the tail, in all over twenty in number, that on 



