148 
ZOOLOGICAL LITERATURE. 
Opiiiocepiialidas. 
On tlie peculiarity of respiration in some Ceylonese species see Mr. Boake’s 
observation mentioned below. 
Channa ocellata (Ptrs.) is described as Ch. fasciata (sp. n.) by Steindachner, 
Verb, zool.-bot. Ges. Wien, 1800, p. 481, taf. 0. tig. 1. 
Labyrintiiici. 
The Hev. Principal Boake has made the most interesting 
observation, and proved it by experiment, that several Ceylonese 
fishes are obliged to rise at certain intervals to the surface of 
the water to receive a quantity of air, the oxygenation of the 
blood by means of the gills being apparently insufficient to 
support life. When prevented from rising to the surface, they 
invariably died within from one to six liours. The species 
experimented upon were the Maddhacariya [?], Hoonga [^Clarias 
teysmannt], Magoora [?], Connia [^Ophiocephalus kelaartif\j 
Xioola [Ophioc. siriaius'], Kawaya lAnabas oligolepis]^ Pooloota 
[Poly acanthus signatus'] . J ourn. of the Ceylon Branch R. As. 
Soc. 1866, pp. 128-143. [As regards Anabas and other Laby- 
rinthici, this observation is opposed to the statement of other 
naturalists, according to which these fishes are able to remain 
for a long period in more or less thickened mud, the surface of 
which is covered Avith so firm a crust that it is impossible for 
the fish to rise to the surface and to receive air. The branchial 
cavity was supposed to hold a small quantity of water, filtered 
into it from the surrounding mud.] 
Trachypterid.e. 
4 Qymnetms hanhsii (?). The capture of a specimen off the coast of Durham, 
about the beginning of March, is reported by Tristram, Proc. Zool. Soc. 18GG, 
p. 147. The same specimen is mentioned in Ann. & Mag. Nat. Hist. xvii. 
p. 312 ; and again by J. Hogg, ibid. p. 390. A second example was found 
near Whitby on Apvil 23, Hogg, ibid, xviii. p. 136. 
ACANTHOPTERYGII PHARYNGOGNATITI. 
Pomacentrus ohUisirostris (Gthr.) is figured in Fish. Zanz. pi. 10. f. 4. 
Pomacentms trichrourus (not trichourus, as misprinted), sp. n., Gunther in 
Fish. Zanz. p. 146, pi. 17. f. 6. 
Glyphidodon. M. Paul Gervais regards the Spams desfontainii (Lacdp.) 
as a species of this genus,* see above p. 138. 
Glyphidodon adenensis,s^. n., GUnther in Fish. Zanz. p. 83, pi. 11. f. 1. 
lleliastes opefi'cidarisy sp. n., Giinther, 1. c. p. 84, pi. 11. f. 2, Zanzibar. 
^ Onychognatlius, g. n., Troscliel, Wiegm. Arch. 1866, p. 231. Prfeoperculum 
irregulariter denticulatum j os protractile ; dentes intermaxillares et inandi- 
bulares pluriseriati conici, serie externa maiores j maxilla acute carinata supra 
uncino retrorso instructa; spinae dorsalis 12, anales 2j radii membranae 
branchiostegae sex ; pseudobranchiae. t). cauUts, sp. n., I, c. taf, 5. figs. 12- 
14, from the Cape de Verde Islands. 
