222 SUB-CLASS (AND ORDER) TELEOSTEI. 



Glanidium, CentrotnoMua, Trachdyopterus, Cetopais, Aetrophysus ; Syno- 

 dontia C. and V., trop. Afr. 



Callomystax Gunth., Bengal, Mochocus Joannis. Bhuwglanis Giinth., 

 Upper Nile. 



Mahptenirus Lac, electric cat-fish, trop. Afr., electric organ extends 

 over whole body beneath the skin.* 



Siygogenes, Arges, Brontes and Aatroplebus in the lakes and torrents 

 of the Andes, Humboldt thought they lived in subterranean waters 

 and were ejected by volcanoes ; CaUichthys, similar in dist. and habits 

 to Doras (p. 221) ; Chaetostomus with the allied Plccostomus, Liposarcus, 

 PtcrygopUchthys ; Rhinelepis, Acanthicus, Xenomystus, from f. w. of S. 

 Anier. ; Hypoptopoma ; Loricaria L., trop. Amer., Acestra Kn., Brazil, 

 Surinam; Sisor, N. India; Ercthistes M. and T., Assam; Pseudecheneis 

 Blyth, Himalayas ; Exostoma Blj-th, E. Ind. continent. 



Asprcdo L., Guiana, the female attaches the eggs to the spongy integu- 

 ment of its belly by pressing against them ; Bunocephalus, Bunocephal- 

 ichihys and Harttta from trop. Amer. 



neptapterus, Xematogenys, Tridiomycterns, Eremophilus, Pariodon 

 are small S. American fonns from f. w. of high altitudes to 14,000 ft.; 

 they resemble the loaches of the N. Hemisphere in appearance and 

 habits. 



Stegophilm Rein., and VandelUa C. and B., small fishes from Brazil, 

 the latter are said to ascend urethra of persons bathing, but there is no 

 doubt that they enter the gill-cavity of larger fishes. 



Cathorops Jordan and Gilbert, Panama ; Jctalurus Raf., f. w. of N. Amer. 



Sub-order 3. SYMBRANCHH. 



Body eel-shaped. Shoulder-girdle usuallj^ joined to the skull ; 

 no mesocoracoid. Scales minute or absent. No paired fins. 

 Unpaired fins reduced. Anus far from head. No air-bladder ; 

 gill-openings confluent in a single slit. Stomach without cae- 

 cum and pyloric caeca. Ovaries with oviducts. Widely dis- 

 tributed in warm seas and freshwaters. 



Fam. 20. Symbranchidae. Eel-like, without paired fins, scales 

 minute or absent ; gill-openings confluent into one sUt on the ventral 

 surface ; anus far from head ; no air-bladder, stomach caecum or pyloric 

 caeca ; with o\-iducts ; f. w. and brackish w. of trop. Anier. ; 3 genera, 

 and one marine genus {Chihbra7ichus) from Australia. Atnphipiious Miill 

 Bengal, 3 brancliial arches of which the second alone possesses gills, and 

 narrow slits, with a lung-like branchial sac on each side opening between 

 hyoid and first bi anchial arches and supphed by brancliial arteries ; A. 

 cuchia ; Monoptents Lacep., 3 branch, arches and small gills, no branch, 

 sac. East Ind. Arch, and Cont. ; Symbranchus Bl., 4 branch, arches and 

 large gills, trop. Amer. and E. Ind. 



* Ballowitz, Das elect. Organ des afrikanischen Zitterxcelsea Jena 

 1899. 



