242 Memoir Seats Foundation for Marine Research 



lb. Lower anterior corner of caudal broadly rounded. 



3a. Midpoint of base of ist dorsal about midway between origin of pelvics and inner 

 corner of pectoral when latter is laid back. 



4a. Teeth noticeably asymmetrical, their outer margins deeply concave, their tips 

 moderately pointed j dermal denticles strongly ridged, usually to their tips. 



puncfulatus ^isso, 1826. 



Mediterranean. 



4b. Teeth nearly symmetrical, their outer margins only weakly concave, their 

 tips broadly rounded; dermal denticles ridged only at their bases, their tips 

 smooth, transparent. calif amicus Gill, 1864. 



Northern California to Cape 

 San Lucas and Gulf of Cali- 

 fornia. 



3b. Midpoint of base of ist dorsal much closer to inner corner of pectoral when this 

 is laid back than to origin of pelvics. 

 5a. Teeth symmetrical, evenly rounded in both jaws. 



6a. Lower anterior corner of caudal not expanded as a lobe; snout in front 

 of mouth about 4 times as long as horizontal diameter of eye. 



fasciaius Ga.rmzn, 19 13. 

 Southern Brazil, Uruguay, 

 northern Argentina. 



6b. Lower anterior corner of caudal expanded as a low, rounded lobe ; snout 

 in front of mouth only 2 to 3 times as long as horizontal diameter of eye. 

 7a. Horizontal diameter of eye considerably longer than distance be- 

 tween nostrils, and about ^^ as long as snout in front of mouth; 

 denticles on shoulders strongly ridged, usually to their tips, and 

 opaque. asterias Cloquet, 1 8 1 9. 



Eastern Atlantic, Mediter- 

 ranean. 



7b. Horizontal diameter of eye slightly shorter than distance between 



nostrils, and only Vs as long as snout in front of mouth ; denticles 



on shoulders ridged only near their bases and so transparent that the 



pedicels are visible from without, mento* Cope, 1877, p. 259. 



5b. Teeth noticeably asymmetrical, their margins more or less concave. 



8a. Sides in adults conspicuously marked with white spots. 



asterias Cloquet, 1 8 1 9. 



Eastern Atlantic, Mediter- 

 ranean. 



8b. Sides in adults plain colored. 



9a. Lower anterior corner of caudal not appreciably expanded even in 

 adult. schmitti Springer, 1938. 



Southern Brazil, Uruguay and 

 northern Argentina. 

 4. Including ahbotti Evermann and RadcliflFe, 1917, and eiul't! Perez Canto, 1886. 



