A CANTIIOPTERYGII. SCOMBRID^. 



TAB. XIX. 



TETRAGONURUS ATLANTICUS, Nob. 



Escolar de natura. 



The Square-tail, or Sea Raven. 



Char. Gen. 



Corpus subelongatum, fiisiforme, subcylindricum, capiteque squamosum ; postice tetragonum, 

 utrinque bicarinatum. 



Caput tetragonum, simplex, inerme. Rostrum breve, tnincatum ; maxillis antice emarginatis ; 

 inferiore lateribus s. parietibus valde elevatis, pyxidatim intra superiorem claudente. Operculum 

 et praeoperculum inennia, plana, squamosa. Dentes pectinato-uiiiseriati, minuti, posterioribus 

 longioribus : palatinis uniseriatis. minutis : vomerinis paucis. 



Pinnae dorsales duse ; antica angusta, longiore ; secunda brevi, triangulari, antice elevata : pinna 

 anali secundae dorsali simillima. Pinnae ventrales parvae normales, subabdominales. Pinna caudalis 

 furcata. Membrana brancbiostega quinqueradiata. 



Obs. — Squama magna;, arctissime adnata, concinniter spiraliter dispositae, durae, striatae, pectinatae, 

 ciliatae. Carince caudales breves, cristiformes, lacerato-serratae. Pinnulse spurise nullse. Abdomen 

 ecarinatum. 



Pisces regionis temperatae, oceanici, rarissimi, soUtarii, erratici, minores, luiicolores, fusco-nigri- 

 cantes : Thi/rsiti, Promaihei, Apluri, &c., affines ; fonna, orisque caudaque structura, deutibus, ac 

 squamis insignes. 



Chak. Spec. 



T. capite subproducto : corpore subcylindrico vix corapresso : oculis maximis. 



7 -\- VIII 

 !■»» D. 15 ; 2'!=' D. 11 ; A. 11 ; P. 16 ; V. I + 5 ; C. I Z yu ' 



M. B. 5 ; Sq. liu. lat. 90 ; Vert^e. 



T. atlanticus, Suppl. Mad. Fish, iu Proceed. Zool. Soc. 1830, p. 79. 



Lonyit. = 9^ poll. = 7^ X alt. 



Tempus, aestate. 



Locus, in profundis : rariss. 



In the work of Rondelet, so early as tlie year 1554, we find at page 

 423, the first record of a fish allied generically, possibly specifically, to the 

 subject of this chapter ; accompanied by a figure., rude indeed, yet not 

 entirely devoid of character. This figure is described to have been taken 

 from an example communicated by an individual at Pisa named Fortius, 

 of eminent acquirements and liberality : and a remark on its excessive 

 rarity is prefaced by the statement, " undis nostris incognitus est." This 

 author notices its resemblance in the aspect of the body to the Grey 



VOL. I. 



