Geology and Natural History. 225 
satisfy our thirst for information in a more copious manner. 
different works; but perhaps a future number of the iar 5 
will embrace them, as well as the other new observations of Mr. 
Lyman on this branch of the animal kingdom. 
n some of the new genera established in these two works, and 
to Ophioenemis obscura Ljn.; in fact, I entertain a strong suspl- 
cion that this species is identical with 0. cacaotica, and I see no 
rmorat 
8 far as I can judge from the description and figure, iotham- 
nus also ees very wel h Ophiacantha, the differences being 
I think, only of specific value. Not having access 1e8 
re “ 
all, in the commonly accepted sense of the word; and my belief 
that if, after this suggestion, Mr. Lyman will reconsider the ques- 
tion, on the base of the lately acquired fuller knowledge of the 
genus Ophiacantha, he will feel himself satisfied as to its conflu- 
ence with Ophiomitra and Ophiothamnus. : : 
. [This ah a by Dr. spec of Copenhagen, will be continued 
in the next number of this Journal. 
Am. Jour. Sct.—Tarrp Serres, VoL. III, No. 15.—Marou, 1872. 
15 
