120 THE GENERA OF FISHES 



Ausonia Risso, 341 ; type Ausonia cuvieri Risso. 

 A synonym of Luvarus Rafinesque. 



Aurata Risso, 355 ; type Aurata semilunata Risso. 

 A synonym of Sparus L. as restricted by Fleming. 



Macrostoma Risso, 447 ; type Macrostoma angustidens Risso. 



Not Macrostomus Wied, a genus of insects; replaced by Notoscopelus 

 Giinther. 



Alpismaris Risso, 458; type Alpismaris risso Risso. 

 The young of Synodus. 



Paralepis Risso, 472; type Paralepis coregonoides Risso (Coregonus 



MACR^NULA RisSO, 1810). 



CXXI (A). GERMAR, Keferstein's Deutschland's Geognosie Darge- 



stellt, 1826. 



E. F. Germar. 



Ichthyolithus Germar, IV, 96; type Ichthyolithus esociformis 

 Germar. 

 Perhaps identical with Leptolepis. Ichthyolithus, a term for fossil fishes 

 used by early authors, is perhaps not intended as a scientific name. 



CXXII. GEOFFROY ST. HILAIRE, Histoire Naturelle des Poissons 

 de la Mer Rouge et de la Mediterranee, 1826. 



Isidore Geoffroy St. Hilaire. 



Trygon Geoffroy St. Hilaire ; type Trygon grabatus Geoffroy St. 

 Hilaire. 

 This species is not noticed by recent writers. It is apparently a species of 

 TvENiuRA Miiller & Henle, 1842, allied to T^niura lymma (Forskal). This is 

 generically distinct from the type of Trygon (Adanson) Cuvier, 1817. St. Hilaire 

 makes no reference to Adanson, from whose manuscripts Cuvier took the name. 

 It is plain that the date of the article which contains the name Trygon is subse- 

 quent to 1825, as a footnote relates to a paper read in October 1825, and printed 

 in November. Hence we assume the date of the present paper as 1826. In any 

 event Trygon St. Hilaire is preceded by Trygon Cuvier, and both are later than 

 Dasyatis Rafinesque and Dasybatis Klein. 



