HOLOCENTRIDAE. 



91 



51721, 7g inches long and find it differs from the measurements given by Jordan 

 and Seale as follows: — head 3.08 instead of 3.40 in length; eye 2.19 instead of 

 2.50 in head; dorsal X-1, 152 instead of X-1, 14 (15 in figure); anal IV, 14^ 

 instead of IV, 13 (14 in figure); interorbital 3.53 instead of 3.85 in head. 



The patch of enlarged blunt outer teeth on each side of upper and lower 

 jaw referred to by Jordan and Seale are very probably sexual or breeding tubercles 

 since they are not constant, and are found in other species. If, however, they 

 refer to the presence or absence of true outer enlarged teeth in the maxillary, 

 these also are not characteristic, since they are present in varying degree in all 

 the specimens we have examined. The dentition on the lower posterior margin 

 of maxillarj- is not characteristic, it may or may not be present; in some speci- 

 mens it is found on one side and not on the other. 



The following comparative measurements, of eight examples here identified 

 as M. pralinius from Cook Bay, Easter Island, three examples from Samoa 

 (identified as such by Jordan and Seale), the Type of M. sanguineus from Samoa 

 and the Type of M. symmetricus from Hawaii, show such slight differences in 

 essential characters that we are unable to separate the species. 



Proportional measurernents of M. pralinius from Cook Bay. 



Proportional measurements of M. pralinius from Cook Bay. 



