143 



Fam. CHiETODONTIDiE, 



Genus Leirus. 



Corpus elliptlcum, compressum ; squamis deciduis parvis. 



Caput parvum, nudum, declive. 



Os parvum : maxilla superiore obtusissiraa ; inferiore breviore, 

 truncata. 



Dentes minuti, simpliceSj in utraque maxillil 1-seriati : palatini 

 nulli. 



Opercula marginibus serratis. 



PinncB dorsalis analisque postice latiores, squamosas. 



Membrana branchiostega 7-radiata. 



Obs. Genus Bramce, Bloch, maximeaffine. Differt prsecipue den- 

 tibus palatinis nullis : etiam pinna caudali haud profunde biloba. 

 Leirus Bennettii. 



Tetragonurus ? siMPLEX. Tet. caudd utrinąue simplici. 



D. 15, 20 (fere), P. ferė 10. V. 6. A. ferė 20. C. fere 20. 

 M. B. 7. 



If this be a true Tetragonurus, Risso, (and there is no reason to 

 doubt it except the absence of the carince on each side of the tail 

 which give to that part in the type of the genus a square form,) it 

 furnishes strong evidence of the affinity of that group to the Scom- 

 bridce. The spurious finlets behind its second dorsal and its anai 

 fins denote a closer approach to the Mackerels than could be in- 

 ferred from Tet. Cuvieri, Risso. 



Crenilabrus Trutta. Cren. virescens, variegata et maculata, 

 squamis medio Jiiscis , fasciis verticalibusjusco-nigrescentibus ; 

 caudd utringue basi ocellatd ; pinnd anali 5-spinosd. 



D. 17 + 8. P. 15. V. 1+5. A. 5+8. C. 15. 



By the smaller number of the spinous rays of its dorsal fin, by its 

 colouring, and by other characters, this fish differs both from Cren. 

 exoletus {Labrus e.roletus, Linn.,) and from the one described under 

 the šame name by M. Risso — two evidently distinct species, — to 

 which raay now be added a third, haviog equally with them five 

 spinous rays in the anai fin. 



Rhombus Maderensis. Rhomb. corpore ovali, supra scabritis- 

 culo, etuberculato, oUvaceo-Jiisco, nigrescente vel Jerrugineo ; 

 annulis pimctorum albidorum, maculas ocellosve pallidosjbrman- 

 tibus, sparsim picto ; injrd albo, immaculato ; pinnce dorsalis ra- 

 diis indivisis, indusis ; dentibus mijiutis, l-seriatis. 



D. 91. A. 69. P. sup. 10. inf. 9. V. sup. 6. inf. 5. C. 15. 



A rather small but elegantly marked species, the spots on the co- 

 loured side resembling little orreries or planetaria. Its nearest re- 

 lation seems to that which Risso has described under the name of 

 Rhomb. mancus, though it has not the lengthened pectoral fin on 

 the upper side of that species. It is not very uncommon in the bay 

 of Funchal, and is the only one of its genus ytt observed there. 



