Dr. A. Giinther on new Fishes from Zanzibar. 487 
tions, differ én toto. How these differences have been brought 
about is beyond our comprehension; but when we do find 
them, they ought assuredly to be made known. 
The three species of Hutoxeres above described are on a par 
with Phaéthornis Guyi, P. Emilie, and P. yaruqui, which 
every one now regards as distinct. Sufficient has been said 
to ee out the specific peculiarities of L. aquila, H. heterura, 
and £. Salvini; it is therefore unnecessary to give a descrip- 
tion of the latter. : 
The species of the genus Hutoxeres now known are :— 
Eutoxeres Condamint. Habitat Archidona in Eastern 
Ecuador. 
heterura. Hab. Central Ecuador. 
—— aquila. Hab. New Granada. 
Salvint. Hab. Veragua and Costa Rica. 
LIII.—Additions to the Ichthyological Fauna of Zanzibar. 
By Dr. A. GUNTHER, F.R.S. , 
Dr. Krrx has lately sent a collection of Fishes from Zanzibar 
to the British Museum ; it contained the following new forms 
(besides several others previously not known to exist on that 
coast, viz. Dules Bennettit, Rhynchichthys pelamidis, Brama 
orcint, Eleotris madagascariensis, El. fusca, Chromis mossam- 
bica, Exocetus nigripinnis) :— 
Tholichthys osseus. 
I propose this name for a fish which, although young, is 
(Six times the natural size.) 
evidently the type of a new genus, and appears to belong to 
Ann. & Mag. N. Hist. Ser. 4. Vol.i. 32 
