PISCES. 187 



There is another species from the high north (above 60 N. L.), which 

 has only a single dorsal fin, far from the tail, and which is distinguished 

 by teeth in the palate and vomer, Affonus monopterygius Bloch, Ichth. Tab. 

 178, figs. I, 2, Cuv. et Val. Poiss. vi. PI. 169. 



Cottus Cuv. Body fusiform, mostly quite scaleless or covered at 

 the sides with scales. Teeth in the anterior part of vomer. Ventral 

 fins small, mostly with four rays, sometimes five or three. 



Sp. Coitus ffobio L., Bloch Ic/Uh. Tab. 39, figs, i, 2, Skandinav. Fishar. PI. 7, 

 fig. 3 ; in fresh water ; there are five rays in the ventral fins ; this species 

 is small, not much above 4" long. — Cottus scorpius L., Bloch Ichth. Tab. 

 40, Skandinav tens Fishar PI. 5, Yareell Brit. Fish. p. 60 ; the sea-scorpion 

 {donderpadde Dutch, Rotsimpa Swedish, Ulh Danish) ; the prwoperculum 

 has usually four spines, of which the uppermost is the longest, but does 

 not reach to the extremity of the large spine of the operculum; the upper 

 jaw mostlj' extends slightly beyond the lower. This species becomes 8 — 10'' 

 long, and occurs on the west coast of France, and as far as Iceland in the 

 North Sea. 



In some exotic species teeth are found on the palate-bones in addition to 

 those on the vomer. Cottus asper Richardson, Fauna horeali-Americ, 

 Fishes, PI. 95, fig. i, Cottus uncinatus Schl., Faun. Jap. Pise. p. 38. From 

 this Richardson has formed the sub-genus Centridermichthys. The skin 

 is rough from small warty inequalities or spines ; the prseoperculum has 

 a spine directed upwards. Here belongs, as it seems, also Cottus platy- 

 cephalus Pall, 



Uranidea Dekay. 



Hemitripterus Cuv. Head sub-depressed, aculeate, armed with 

 many jagged cirri. Teeth sharp, crowded in jaws, vomer and 

 palate-bones. Branchiostegous membrane with six rays. Anterior 

 dorsal fin deeply emarginate. Body scaleless. 



Sp. Hemitripterus americanus Cuv., Cottus triptetygius and hispidus Bloch, 

 Syst. Ichth. Tab. 13, Cuv. F. Ani., ed. ill., Poiss. PI. 22, fig. i; on the 

 coasts of N. America. 



Pungitius L. [Mus. Ad. Frid.), Ceplialacantlius Lac. Head 

 obtuse anteriorly, flat above, with a long lateral spine on each side 

 produced to the base of dorsal fin. Eyes large. Prseoperculum 

 armed with a long spine, directed backwards below the pectoral 

 fins. A row of very small teeth in jaws. Branchiostegous mem- 

 brane with three rays. Pectoral fins small, bifid. Body covered 

 with keeled scales. 



Sp. Pungitius pusiUus L. (Gasterosteus spinareUa L. Syst. nat.), Mus. Ad. 

 Frid. Tab. 32, fig. 5, Cuv. R. Ani., ed. ill., Poiss. PI. 20, fig. 4; a small 

 fish from the east coast of tropical America. 



