384 Analytical Synopsis of the Order of jSqvali. 



II. Leptochariana. Leptocliarias (=Tri8enodon). 



III. Galeiana. 1. Galeiis. 2. Galeocerdo. 3. Loxodon. 4. TLa- 

 lassorliinus. 



IV. Triakiana. 1. Triakis. 



V. Mustel'mnu. 1. Musteliis. 



VI. Isurina. Isiirus (^cr/. = Lamna C). 2. Oxyihina. 3. Car- 

 charodon. 4. Cetorbinus (^^. = Selaclie Cuv.). 



VII. Odontaspidiana. Odontaspis. 



VIII. Alopeciana. 1. Alopias (i? = Alopecias M. <& H). 



IX. Hetcrodontina, 1. Ilcterodontus (£/.=: Cestracion Cuv.). 



X. Hhineodontiana. 1. Rliinodon. 



XI. Hexanchina. 1. Hexancbus. 2. Heptranchns ( = Hcptanchns 



XII. Acantiana. 1, Acantliias. 2. Spinax. 3. Oxynotiis (i^. = Cen- 

 trina Cuv.). 4. Acanthorhinus (^/.:=Centrophorus Jf. c6 iiT.). 

 5. Centroscyllium. 



XIII. Dalatiana. 1. Dalatias (^Scj-mnus Cwi'.) a Dalutias ( = 

 Scymmis M. & H.) Somniosus {Lq?,=:i Laemargus M. dt. H.). 2. 

 Ecbinorhinus. 



Fam. 3. Squatinid^. 



1. Squatina. 

 Sect. II. Rail 

 Fam. 4. Pristisid.e. 



1. Pristiopborus. 2. Pristis. 



On account of the consideration of the Scylh'oids as a " fa- 

 mily" or group, equivalent to the combination of the others — 

 except the Squatinid® which constitute a third family — and by 

 the retention of Pristiophorus in the " section" of the Rays, 

 this arrangement departs from that of Miiller and Henle, and is 

 correspondingly erroneous. PristiopJiorus entirely agrees with 

 the characters of 'the Squall as retained by Gray, and equally 

 disagrees with those of the Raim. Its resemblance to Pristis is 

 remote and simply analogical, not indicative of true affinity. 

 Pristis is in every respect a true Ray. The restoration of some 

 of the names appears also to have been proposed without due 



