FISHERY BULLETIN: VOL. 70, NO. 3 



160° 



I 



140° 



30' 



20' 



10' 



Hawaiian Is 



AA 



160° 



140° 



Figure 1. — Localities and numbers of specimens examined. Circles in eastern area indicate "eastern spinners"; 



triangles indicate "whitebelly spinners." 



Hunter, and Whitney, 1963; Nishiwaki, 1967; 

 Pilson and Waller, 1970), but others regard S. 

 microps as a synonym of S. longirostris (Gray) 

 1828 (Hershkovitz, 1966; Rice and SchefFer, 

 1968; Harrison, Boice, and Brownell, 1969) . The 

 spinner porpoise of Hawaii has been referred to 

 jS. longirostris (Hershkovitz, 1966; Nishiwaki, 

 1967; Tomich, 1969) and to S. roseiventris 

 (Wagner) 1853 (Brown, Caldwell, and Caldwell, 

 1966; Fraser, in Morris and Mowbray, 1966; 

 Rice and Scheffer, 1968) . The type localities for 

 S. microps and S. longirostris are unknown; S. 

 roseiventris was described from the Banda Sea, 

 Indonesia. The spinner porpoise of the far off- 

 shore areas of the eastern Pacific — called "white- 

 belly spinner" by fishermen — has not to my 

 knowledge been previously described or referred 

 to any named species. No critical review of the 



Figure 2. — Calf of eastern spinner. 

 Male, 105 cm total length, from 

 lat 10°30'N, long 92°56'W, April 4, 

 1968. Perrin field no. CV83; speci- 

 men not saved. Shape of dorsal fin 

 is distorted by angle of photograph, 

 should be higher. Photographed 

 minutes after death. 



Figure 3. — Lateral (a) and ventral 

 (b) views of subadult eastern spin- 

 ner. Female, 166 cm, from 2l°43'N, 

 106°47'W, February 17, 1967. Ma- 

 rine Mammal Biological Laboratory 

 (Seattle) field no. 1967-102. Skel- 

 etal specimen in MMBL collection. 

 Photographed minutes after death. 



Figure 4. — Adult eastern spinner. 

 Female, 166 cm, from 12°51'N, 

 93°18'W, April 9, 1968. Perrin field 

 no. CV7; specimen not saved. Pho- 

 tographed minutes after death. 



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