86 SIRENIDJ3. 



e-f, g, h. Adult. Carniola. 



i-k. Hgr. Carniola. M. Drummond, Esq. [P.]. 



I Adult. Carniola. B. Tyndall, Esq. [P.]. 



m-n. Adult & yg. Magdalenengrotte. 



o. Hgr. ? Miss Bell [P.]. 



p. Skeleton, bad state. ? 



Var. carrarae. 



Hypochton carrarae, Fitzing. I. c. p. 300. 

 Proteus carrarae, Cope, I. c. p. 103. 



Snout more elongate, very narrQw ; twenty-four costal grooves. 

 Dalmatia. 



q. Adult. ? Prof. Carrara [P.]. 



Var. zoisii. 



Hypochton zoisii, Fitzing. I. c. p. 298. 

 Proteus zoisii, Cope, I. c. 



Stouter ; head much shorter, pear-shaped, snout rounded ; twenty- 

 five costal grooves. 

 Rupa, Carinthia. 



r. Adult. Carniola. Vienna Museum. (As typi- 



cal of H. zoisii. ) 



Earn. 4. SIRENIDJE. 



Sirenidae, part., Gray, Ann. Phil. 1825. 



Proteideee, part., Tsehudi, Classif. d. Batr. 



Sirenidae, Gray, Cat. Batr. Grad. 



Tre"rnatoderes proteldes, part., Dum. fy Bibr. Erp. Gen. ix. 



Sirenidae, Cope, Journ. Ac. Philad. (2) vi. 1866. 



Ichthyodea, part., Strauch, Rev. d. Salam. 



Two genera : — 



Three spiracula on each side : digits four. 



1. Siren, p. 86. 

 One spiraculum on each side ; digits three. 



2. Pseudobranchus, p. 87. 



1. SIREN. 



Siren, Linn. S. 2V. i. Addenda; Tsehudi, Batr. p. 98; Gray, Cat 



p. 68 ; Dum. §• Bibr. ix. p. 191. 

 Phanerobrauchus, part., Leuckart, Isis, 1821, p. 260. 



Tongue covering the floor of the mouth, free in front. Jaws with 

 a horny sheath. Vomerine teeth numerous, forming two large 

 patches converging anteriorly. Spiracula three on each side, below 

 the gills. Limbs two, posterior absent ; fingers four. 



North America. 



