;2. a. 20-26 teeth in upper jaws, 18-24 '" lower jaws; body to 5.7 m; 

 teeth may be extensively worn. 



* Bottlenose dolphin, Tumops irumatus (A) 



b. 26 or more teeth in both upper and lower jaws Go to ;j 



5?. a. 54-48 teeth in each )aw; body color varies with age and stock but 

 includes increased spotting with age and size. 



* Spotted dolphin, Stmclla attmuata (T) 



1. Body robust to 2.5 m, dark silver, heavily spotted; distributed 

 within 60 nm of coast south of about 20 N. 



* Coastal spotted dolphin (T) 



2. Body elongated to 2.5 m, less heavily spotted: distributed from 

 south ot Cabo San Lucas to below Equator and west to 145°W. 



* Offshore spotted dolphin 



b. 46-65 teeth in each jaw; spotting absent Go to ^4 



!4. a. Dorsal fin erect, triangular or canted slightly forward; beak long 

 and slender; teeth fine and sharply pointed. 



* Spinner dolphin, Suniila longiroslns (T) 



1. Adult males have pronounced postanal hump and forward 

 canted dorsal fin; body length to 1 .g m. 



* Eastern spinner dolphin 



2. Body more girthy, larger, to 2 m; belly white; sharp color 

 differential from the dark back and sides to white belly; 

 dorsal fin falcate. 



* Whitebellied spinner dolphin 



J. Body larger, to over 2 m; dorsal fin falcate; three part color 

 pattern, dark cape, lighter sides, white belly. 



* Hawaiian and Marquesan spinner dolphin 



b. Dorsal fin falcate or slightly falcate Go to 55 



J 5 . a. Body to 2.7 m; black to dark gray on back, gray on sides, white on 

 belly and throat; distinctive black stripes from eye to anus, eve to 

 flipper, and dark dorsal coloration to side above flipper; dis- 

 tinctive light shoulder blaze extending back and up from light 

 lateral field; rare north of Baja California. 



* Striped dolphin, Stcnclla cccrulecalka ! T/B ) 



b. Body to maximum of 2.6 m but usually less than 2.j m; body 

 dark on back with light thoracic patch and crisscross or 

 houri;Iass pattern on side: cape dips in V-shape just below dorsal 

 fin; black stripe from middle ot lower jaw to origin of flipper; 

 generally uncommon north of Pt. Conception. 



* Common dolphin, Delphnius Jilphis (A) 



61 



