( 811 ) 



Chêlmon Cuv. = Chelmo Giinth. 



Corpus subrhoinboideum. Squamae supra lineam lateralem 

 in series 55 eire. transversas dispositae. Pinna dorsalis spinosa 

 dorsali radiosa multo brevior spinis 9 postrorsum longitudine 

 accrescentibus. — Spec. typ. Chelmon rostratus Cuv. 



Prognathodus (Prognathodes) Gill. 



Corpus ovali-subrhomboideurn. Squamae supra lineam late- 

 ralem in series 40 ad 75 transversas dispositae. Pinna dorsalis 

 spinosa dorsali radiosa multo longior spinis 12 vel 13 praemedianis 

 ceteris longioribus. — Spec, typ. Prognatïiodus aculeatus Poey = 

 Chelmo pelta Günth. 



Phalanx 2. TAURTCHTHYINL 



Maxillae breves non in tubum productae. Analis spinis 3 vel 4. 



a Dorsalis spinosa dorsali radiosa brevior. Corpus rhomboi- 

 deum. Squamae regulariter rotundatae mediis lateribus sub- 

 horizontaliter seriatae supra lineam lateralem in series 50 

 ad 60 transversas dispositae. Analis spinis 3. 



Parachaetodon Blkr. 



Dorsalis spinosa dorsali radiosa plus quadruplo brevior 

 spinis 6 subcontiguis postrorsum longitudine accrescentibus. 

 Dentes, maxillis bene evoluti, vomerini. Rostrum breve. 

 Linea lateralis sub dorsali radiosa desinens. — Spec. typ. Pa- 

 rachaetodon ocellatus Blkr = Platax ocellatus CV. 



Chelmonops Blkr. 



Dorsalis, spinosa dorsali radiosa minus duplo brevior spi- 

 nis 11 postrorsum longitudine valde accrescentibus, radiosa 

 acuta margine posteriore subverticali. Orbitae antice spinu- 

 losae. Rostrum valde acutum. Dentes maxillis bene evoluti. 

 Linea lateralis pinnam caudalem attingens. — Spec. typ. 

 Chelmonops truncatus Blkr = Chaetodon truncatus Knor — 

 Chelmo truncatus Giinth. 



