112 THE NATURAL HISTORY RETIEW. 



? No tarsal wing. Manubrium a bony- 

 style ; xiphisternal basal plate broad . . LimnocJiaris. 

 aa. Toes free. 



5. Terminal dilatations on phalanges with processes. 

 No vomerine teeth or digital fringes j tongue 



very narrow, free Phyllolates» 



Vomerine teeth and digital fringes ; tongue 



oval, adherent Crossodactylus. 



Vomerine teeth and no digital fringes . . Tlnliydrobius, 



hh. No digital dilatation; xiphisternum with a fibro- 

 cartilaginous or osseous style. 



No lumbar gland Cystignatlius. 



A lumbar gland Gnatliophysa.^ 



III. Toes more or less webbed, terminal phalanges simple ; basal 



xiphisternal piece a broad, fibro-cartilaginous disc. Prefrontals 

 in contact anteriorly only, or separated by the prolonged 

 ethmoid plate. No fronto-parietal fontanelle. Manubrium 

 none, or very short. Head short, elevated. 



Eyelids prolonged; a cranial dermo-ossifi- 



cation Ceratoplirys. 



Eyelids and cranium normal ; a metatarsal 



shovel Tomopterna. 



IV. Toes webbed ; no digital dilatations, phalanges simple. Fronto- 



parietal fontanelle present or absent ; prefrontals extensively 

 in contact medially, and more or less with the fronto-parietals. 

 Manubrium cartilaginous. 

 a. No fontanelle. 



Xiphisternum a thin cartilaginous disc ; a 



cranial dermo -ossification CalyptocepTialus.^ 



Xiphisternum smaller, medially a small , 



fibro-cartilaginous portion. Prefrontals 

 transverse, no dermo-ossification ; a 



lumbar gland FitJiecopsis. 



aa. A fontanelle. 



Xiphisternum with a proximal fibro-car- 

 tilaginous disc. No glands or dermo- 

 ossification. Prefrontals transverse . . CyclorJiamphus. 



* Contains the Cydigyiathus labt/rinthicus, figured by Castelnau. 

 t Phrijnocerus testndiniceps (Pr. Ac. Nat. Sc. Phil. 1862, p. 157) is a species of 

 this genus. 



