Analytical Synopsis of the Order of Squali. 375 



would be equivalent to tlie offer of a premium for carelessness 

 and inaccuracy, for which that author was so notoriously dis- 

 tinguished. 



-His Tetroras angiova has been regarded by the Prince of 

 Canino as a synonyme of Notidanus (or Heptranchias) cinereus, 

 but such cannot be the case, as the character ^^ due ale dorsaW^ 

 at once demonstrates. The notice of the dentition {denti in 

 forma di raspo), of the large branchial apertures {V aperture 

 delta hranche hastantemente larghe)^ and of the caudal carina {tm 

 appendice ad ogni lato delta coda)^ as well as of the color {higio 

 nerastro), and small eyes {occhi piccollssi'mo), can only refer to 

 the Cetorhinus Tnaximus of Blainville, or the great basking 

 shark, or at least a species of that genus. The attribute of four 

 branchial apertures is of course incorrect. 



Cerictius is doubtless founded on factitious specimens. 



Dalatias is synonymous with Squalus, the large spiracles 

 having been overlooked. 



The Etmopterus acideatus is apparently founded on the Spi- 

 nax niger, whose fins, like those of other species of the genus, 

 exhibit a tendency to become cleft and laciniated, giving them 

 somewhat of a rayed appearance. It is true that Spinax has 

 the teeth of the lower jaw subquadrate, with an almost hori- 

 zontal incisorial edge, and those of the upper jaw cuspidate and 

 pointed as in Scyltmra^ while Kafinesque attributes to his spe- 

 cies only pointed teeth (i denti piccoli ed acuti), and three bran- 

 chial apertures {t7'i hranchie da ogni lato delta testa) ; but — 

 Mafinesgue describes ! 



8. — Blainville next, in 1816, published his views on the classi- 

 fication of the sharks, in which he distributed the genera in the 

 following manner : — 



1. Scylliorhinns (canicnla). 



2. Ecliinorhinus (spinosus). 



3. Monopterhinns (griseus). 



4. Galeorhinus (rausteius, galeiis, etc.) 



5. Acanthorliinus (acatithias). 



