TELEOSTEI DIPNOI. 173 



Fam. Gobiidae. Gobies. Gdbius niger Rond. ; G.fluvlatilis Pall., Elvers of 

 Italy and of South-west Eussia. 



Fam. Blenniidae. B Jennies. Annarliiclias lupus L., Wolf-fish ; Blennius 

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

 viviparous. 



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

 gated-like body. Tracliypterus falx Cuv., Val. = Tr. tce?iia Bl., Schn., Nice ; 

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



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

 have the form of coiled (meandering) lamellae (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 stouf 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. Lopliius piscatorius L., Angler, Frog-fish, etc. (jSdr/ja^os 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 



FIG. 618. Protopterus annectens. 



them as fish-like Keptiles, 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 

 v 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 aus dem Wide- 

 Bay-District in Queensland." 



A. Gunther, " Ceratodus und seine Stelle im System." Arch, fur Naturgesch., 

 Tom. XX.A.VII., 1871. 



A. Gunther, " Description of Ceratodus, a genus of Ganoid Fishes." Phil 

 Transact., 1871. 



