13 



L-PISCES. 



Characters. — Pisces have the characters of Ichthyopsida, plus those given 

 in the middle column of Table at top of page. 



STTB-DIVISIONS. 



II.— AMPHIBIA. 



Characters. — Amphibia have the characters of Ichthyopsida, plus those 

 given in third column of Table at top of page. 



SXJB-X>IVISIONS. 



1. Ueodela. — Tailed Amphibia. Amphiccelous or opisthoocelous verte- 



brae. Presacral vertebrae exceed nine. e.g. Proteus (external giUs 

 persist throughout life); Menopoma (gills drop off, gill-slits remain); 

 Salamander (gills drop off, gill-slits close up). 



2. Andea. — Larva has a tail, a suctorial mouth, giUs, gill-slits. In 



adult tail drops off, gills and gill-slits disappear. Presacral vertebras 

 procoelous, and do not exceed nine. e.g. Eana (frog, has tongue) ; 

 Dactylethra (tongueless). 



3. Gymnophiona (Coecilia). — Body is serpent-like. Limbs absent. 



Skin is ringed, and has scales embedded in it. e.g. Ccecilia. 



