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mae regulariter rotundatae lateribus subhorizontaliter seriatae, 

 trunco in series 55 eire. trans versas dispositae. Rostrum obtu- 

 sum. Dorsalis spinis 1 2 parte spinosa radiosa paulo longiore, 

 radiosa obtuse rotundata. — Spec. typ. Citharoedus Meyeri Kaup. 



Rabdophorus Swns. — Corpus ovale. Squamae regulariter 

 rotundatae, trunco in series 40 ad 50 transversas dispositae. 

 Dorsalis spinis 12 ad 16 parte spinosa radiosa multo ad duplo 

 fere longiore. — Spec. typ. Rabdophorus ephippium Swns. 



Tetragonoptrus Klein. — Corpus subrhomboideum. Squa- 

 mae regulariter rotundatae, trunco in series 40 ad 55 transver- 

 sas dispositae Series squamarum lateribus subhorizontales vel 

 parum oblique postrorsum adscendentes. Dorsalis spinis 12 ad 

 14, parte spinosa parte radiosa multo minus duplo longiore, ra- 

 diosa obtusa. — Spec. typ. Chaetodon striatus L. 



Hemichaetodon Blkr. — Corpus orbiculato-subrhomboideum. 

 Squamae regulariter rotundatae, trunco in series 45 eire. trans- 

 versas dispositae. Series squamarum longitudinales dimidio irunci 

 inferiore postrorsum valde descendentes. Dorsalis spinis 12. — 

 Spec. typ. Chaetodon capistratus BI. 



Chaetodontops Blkr. — Corpus orbiculato-subrhomboideum. 

 Squamae regulariter rotundatae, trunco in series 40 ad 50 

 transversas dispositae. Series squamarum lateribus longitudi- 

 nales postrorsum valde adscendentes. Dorsalis, spinis 12 vel 

 13 (rar. 14), spinosa radiosa multo minus duplo longior, ra- 

 diosa obtuse rotundata. — Spec. typ. Chaetodon collaris BI. 



Lepidochaetodon Blkr. — Corpus orbiculato-subrhomboideum. 

 Rostrum breve. Squamae trunco antice obtusangulatim rotunda- 

 tae sequentibus multo majores. Series squamarum trunco antice lon- 

 gitudinales irregulares, transversae valde conspicuae non angulatae. 

 Squamae trunco in series 3 5 ad 45 transversas dispositae. Dorsalis 

 spinis 12 vel 13 (rar. 14). — Spec. typ. Chaetodon unimaculatus BI. 



Linophora Kaup — Corpus subrhomboideum. Rostrum acu- 

 tum. Squamae trunco antice et medio obtusangulatim rotun- 

 datae sequentibus multo majores. Series squamarum trunco 

 antice et medio longitudinales irregulares, transversae conspicuae 

 non angulatae. Squamae trunco in series 30 ad 45 trans- 

 versas dispositae. Dorsalis spinis 13 (rarissime 11, 12, 14). — 

 Spec. typ. Linophora auriga Kaup. 



