dolphins by the following:

ROUGH-TOOTHED DOLPHIN ATLANTIC SPOTTED DOLPHIN

SNOUTS

Long and slender; not clearly Moderate in length and
demarcated from forehead. clearly demarcated from
forehead.

They may be distinguished from Atlantic bottlenosed dolphins by the
characteristics tabularized on p. 128.

Even at a distance the blotched coloration of the side and the white
coloration of the rostrum of rough-toothed dolphins may be visible. If
closer examination is possible, the distinctive shape and coloration of
the beak make positive identification easy.

Distribution

Though records of rough-toothed dolphins from the western North Atlantic
are scant, the species is assumed to be widely distributed in deep
tropical to warm temperate waters. It has been reported from Virginia,
Georgia, Florida, the Gulf of Mexico, the West Indies, and off the
northeastern coast of South America.

Stranded Specimens

In addition to the characteristics listed above for distinguishing
living animals, stranded rough-toothed dolphins can be readily
identified by the fact that the 20-27 fairly large teeth per jaw per
side have a series of fine vertical wrinkles on the crown, a
characteristic from which the species derives its common name. (These
wrinkles are often difficult to detect.)

[Illustration: Figure 149.--Captive rough-toothed dolphins in Japan.
Note the distinctive, smoothly tapering head and the white coloration of
the sides and front of the snout. Rough-toothed dolphins are probably
widely distributed in the offshore waters of the tropics. The streamers
on the backs of the animals are marker tags (see Appendix A.) (_Photo
courtesy of Japanese Whales Research Institute._)]

[Illustration: Figure 150.--Closeups of the highly distinctive head of a
rough-toothed dolphin showing the white lips and the lack of a clear
demarcation between the snout and the forehead. This species has from 20
to 27 fairly large teeth in each side of both the upper and lower jaws.
(_Photos at Sea Life Park, Hawaii, by K. C. Balcomb (top) and S.
Leatherwood (bottom)._)]

[Illustration: Figure 151.--A rough-toothed dolphin stranded near New
Smyrna Beach, Fla. This species has from 20 to 27 fairly large teeth in
each side of both the upper and lower jaws. Those teeth are sometimes
marked by many fine vertical wrinkles along the crown, a c