196 Mr. C. T. Regan— .4 Sj/uopsis of the 



2. Geotria. 



Geotrid, Gray, Chondropt. p. 142 (1851) ; Giinth. Cat. Fish. viii. p. 508 



(1870). 

 Velasia, Gray, L c. 



Yarra, Casteln. Proc. Zool. Soc. Vict. i. 1872, p. 231. 

 Neomordacia, Castelu. t. c. p. 232. 

 Exomegas, Gill, Proc. U.S. Nat. Mus. v. 1882, p. 524. 

 Macrophthabnia, Plate, Sitzungsb. Ges. naturf. Fr. Berlin, 1897, p. 137. 



Disc covered with radially arranged teeth. A single broad 

 quadricuspid supraoral lamina ; infraoral lamina usually 

 weakly cusjddate. Anterior lingual lamina bi- or tricuspid. 



Dorsal fins sejiarate. 



Anstr;dia: New Zealatid ; Chile. 



Synopsis of the Species. 



I. Disc small, with the labial teeth close toofether, almost imbricating ; 



gular pouch small or ab.sent. ( T'elasia.) 

 Inuer pair of supraoral cusps spatulate ; anterior 



lingual plate bicu.spid, the cusps very strong ; 



length of base of tirst dorsal considerably more 



than its distance from the second 1 . chilensis. 



Inner pair of supraoral cusps either ovate or triangular 



and acutely pointed ; anterior lingual plate usually 



tiicuspid ; length of base of first dorsal from a 



little less to a little more than its di^tance fi'om . 



the second 2. stenostoma. 



II. Disc large, with the labial teeth well .separated; a gular pouch. 



{Geotria.) 



A. Supraoral lamina prominent. 



Lateral cusp of supraoral lamina broader than the ad- 

 jacent lateral part of the lamina, from which it is 

 separated by a groove ; anterior lingual tooth 

 tricuspid ; base of first dorsal fin a little shorter 

 than its distance from the second 3. saccifera. 



Lateral cusp of supraoral lamina narrower than the 

 adjacent lateral part of the lamina ; anterior 

 lingual tooth bicuspid ; base of first dor.sal longer 

 than its distance from the second 4. aiLstralis. 



B. Supraoral lamina hidden ; anterior lingual tooth tricuspid ; base 



of first dorsal much longer than its distance from the second. 



5. macrostomus. 



1. Geotria chilensis. 



Velasia chilensis, Gray, Chondropt. p. 143, pi. i. fig. 4 (IBol). 

 Geotria chilensis (part.), Giinth. Cat. Fish. viii. p. 509 (1870). 



1. 380 mm. (type of the specie.s). Chile. 



