616 SCIENTIFIC RECORD FOR 1882. 



brancliiates with <' palatine teeth iu two longitudinal series diverging 

 behind, inserted on the inner margin of two palatine processes, which 

 are much prolonged posteriorly; parasphenoid toothless; vertebrjB 

 opisthocoelian" (B), and with "no postfronto-squamosal arch or liga- 

 ment". (C.) 



1 a. Pleurodelidids = Salamandridae Salamandrinse pt. B. Caduci- 

 branchiates with "palatine teeth in two longitudinal series diverging 

 behind, inserted on the inner margin of two palatine processes, which are 

 much prolonged posteriorly; parasphenoid toothless" (B.), and "with a 

 ])ostfrontal arch, sometimes ligamentous". (C.) 



1 b. Amhlystomids=Sisdaman({ridai Amblystomatinee pt. B. Caduci- 

 branchiates with " series of palatine teeth transverse or posteriorly con- 

 verging, inserted on the hinder margin or posterior portion of the 

 vomers; parasphenoid toothless; vertebrae amphiccelian" (B.), and with 

 "X)alatiues not prolonged over parasphenoid, bearing teeth on the pos- 

 terior portion". (C.) 



1 h. Hi/nohiids = Salamandridae Amblystomatinse pt. B. Caduci- 

 branchiates with "series of palatine teeth transverse or posteriorly con- 

 verging, inserted on the hinder margin or posterior portion of the 

 vomers; parasphenoid toothless; vertebrae ami^hicoeliau" (B.), and with 

 "palatines in contact prolonged over parasphenoid, bearing teeth on 

 posterior external margin". (0.) 



1 c. Flethodontids = Salamandridae Plethodontinse B. Caducibran- 

 chiates, with "series of palatine teeth transverse on posterior portion 

 of vomers ; dentigerous plates on parasphenoid ; vertebrae amphicoelian." 

 (B.) 



1 d. Dcsmo{/nathids=Salsimiindr\(\!£, Desmognathince pt. B. Caduci- 

 branchiates with " series of j)alatine teeth transverse, on posterior i)or- 

 tion of vomers ; dentigerous plates on i)arasphenoid ; vertebrae oi)istho- 

 ccelian" (B.); witii the parasphenoid teeth in two elongate patches, and 

 with the tongue free laterally and behind. 



1 d. T/iom<is= Salamandridae Desmognathinse pt. B. Caducibranchi- 

 ates, with " series of palatine teeth transverse, on posterior portion of 

 vomers; dentigerous plates on iiarasphenoid ; vertebrie opisthocoelian" 

 (B.) ; with the parasphenoid teeth in a single patch and with the tongue 

 free all around and attached only by a central pedicel. 



2. Protono])sids=AmY>hium\diC; pt. B. Caducibranchiates without 

 eyelids, with teeth on anterior margin of palatine bones; no dentigerous 

 plates on parasphenoid; vei-tebrae amphicoelian; "no anterior axial 

 cranial bone;" parietals and prefrontals prolonged, meeting and embrac- 

 ing frontals; wall of vestibule membranous internally; i:)remaxillaries 

 separated; occipital condyles sessile; and with well-developed limbs. 



2. Am2)hiiimld,'i=Ami)hmuudiQ pt. B. Caducibranchiates without 

 eyelids, with teeth on the outer anterior margin of palatines, no dentig- 

 erous plates on parasphenoid ; vertebrae amphicoelian ; "an axial cranial 

 bone (? vomer) in front of orbitosphenoids, and one forming palatal sur- 



