TELEOSTEI DIPNOI. 173 



Fam. Gobiidae. Gobies. Gobiu* niger Eond. ; G.fluviatilis Pall., Rivers of 

 Italy and of South-west Russia. 



Fam. Blenniidae. Blennies. Annarliichas lupus L., Wolf-fish ; Blennius 

 ocellaris L., Butterfly-fish, Mediterranean ; Zoarces mriparus Cuv. (fig. 616), 

 viviparous. 



Fam. Taenioidae. Silvery marine-fish, with compressed, ribbon-like, elon- 

 gated-like body. Trachypterus falx Cuv., Val. = Tr. tcenia BL, Schn., Nice ; 

 Cepola rubescens L., Band-fish, coasts of Europe. 



Fam. Labyrintbici. The upper pharyngeal bones are hollowed out so as to 

 have the form of coiled (meandering) lamellaa (fig. 594), in the spaces between 

 which the water required to keep the gills moist is retained. Andbas scandens 

 Dald., Climbing Perch, East Indies. 



Fam. Pediculati. Of stout' clumsy shape. The skin is naked, or covered 

 with rough prominences. The pelvic fins, which are small and placed on the 

 throat (jugular), have their so-called carpal pieces elongated, so that they form 

 movable arm-like supports for the body, and are in fact used for hopping and 

 creeping. Lopldus plscatorius L., Angler, Frog-fish, etc. (j3dr/>axos of the 

 Greeks), coasts of Europe (fig. 617) ; Chironectes pictus Cuv. 



Order 6. DIPNOI.* 



Scaly Fishes with branchial and pulmonary respiration, with per- 

 sistent notochord, muscular conus arteriosus and spiral valve in the 

 intestine. 



The Dipnoi (fig. 618) form a group so strikingly transitional 

 between Fishes and Amphibians that their first discoverer regarded 



FlG. 618. Protopterus annectens. 



them as fish-like Reptiles, and in more recent times they have been 

 regarded as scaly Amphibians. In their external form they decidedly 

 resemble Fishes. The head is broad and flat, and has small, laterally 

 placed eyes and a fairly widely-split snout, at the extremity of which 

 are placed the two nasal openings. Directly behind the head are 

 two thoracic fins, which, like the similarly-formed pelvic fins, possess 



* J. Hyrtl, " Lepidosiren paradoxa. Eine Monographic." Prag, 1845. 



G. Krefft, " Beschreibung eines gigantischen Amphibiums a us dem Wide- 

 Bay-District in Queensland." 



A. Giinther, "Ceratodus und seine Stelle itn System." Arch, fur Naturqesch., 

 Tom. XXXVIL, 1871. 



A. Gtinther, " Description of Ceratodus, a genus of Ganoid Fishes." PhiL 

 Transact., 1871. 



