BY ALLAN R. MCCULLOCH. 555 



A second specimen, almost 10 mm. long, differs in being 

 deeper, the length being five-sevenths of the depth ; the eye 

 is rather larger, and the spines on the dermal tubercles are 

 much longer. The lower half of the body has been covered 

 with a silvery epidermis, and the fin-formula, which is more 

 easily counted than in the larger specimen, isD.17, A. 14-1- ?, 

 P. 11. 



The third specimen is a trifle smaller, but otherwise similar 

 to the second. It is considerably damaged, and some of the 

 larger tubercles are broken off. 



One of the most striking differences between these speci- 

 mens and those figured by Richardson*, Giintherf, and 

 Ryder|, is in the position of the mouth : in my specimens, it is 

 below the level of the anal fin, whereas, in the others, it is con- 

 siderably above it. The number and distribution of the 

 spines agrees exactly with those shown in Giinther's figiires, 

 and, generally speaking, with those of Richardson and Ryder 

 also, but they are much larger. My specimens have a very 

 slight resemblance to Ostracion hoops, Richardson§, but the 

 figures of that species show no spines on the ventral profile : 

 it must be noted, however, that Hooker's drawings are in- 

 accurate in several important details, as may be seen by com- 

 paring one with another. 



EXPLANATION OF PLATES LVIIL-LIX. 



Plate Iviii. 

 Molacanthtit sip. Specimen 13 mm. long. Front and side-views. 



Plate lix. 

 Molai:anthu>i sp. Specimen almost 10 mm. long. Side-view . 



* RrcHARDSOiJ, Zool. "Sulphur," i., 1844, p.l25, pl.xlii., figs.10-12. 

 fGuENTHER, Study of Fishes, 1880, p.l75, fig.94. 

 J Ryder, Rept. U.S. Comm. Fish., 1884 (1886), p.l027, pl.viii. 

 § Richardson, Zool. "Erebus and Terror," Fishes, 1844-1848, p.52, 

 pi. XXX., figs.lS-21. 



54 



