123

_Lagenodelphis hosei_ Fraser 1956 Fraser's dolphin 120

_Tursiops truncatus_ (Montagu 1821) Bottlenosed dolphin 128

_Grampus griseus_ (G. Cuvier 1812) Grampus 96

_Stenella longirostris_ Gray 1828 Spinner dolphin 110

_Stenella frontalis_ (G. Cuvier 1829) Bridled dolphin 108

_Stenella coeruleoalba_ (Meyen 1833) Striped dolphin 113

_Stenella plagiodon_ (Cope 1866) Spotted dolphin 104

_Delphinus delphis_ Linnaeus 1758 Saddleback dolphin 116

Family Phocoenidae

_Phocoena phocoena_ (Linnaeus 1758) Harbor porpoise 150

This tentative classification follows an unpublished list by W.E.
Schevill and E.M. Mitchell currently under review. The scientific names
are followed by the name of the individual who named the species and the
year of naming, and then by the common name most often used in the
western North Atlantic.[6] It may be noted that some of the authors are
in parentheses. This indicates that though the species name has remained
the same since the date of naming the species has since been assigned to
another genus. Because the species are not arranged in taxonomic order
in this field guide, the page of the synoptic account of each is
provided in the column to the right.

[Footnote 6: Most common names are based on some characteristic of the
species (e.g., spotted dolphin, striped dolphin, rough-toothed dolphin);
others are the names of authors of the species (e.g., True's beaked
whale) or of habitats or macrohabitats which they inhabit (e.g., North
Sea beaked whale and harbor porpoise); the origins of some common names,
however, are less obvious (e.g., dense-beaked whale), and of less use in
field references.]

[Illustration: Figure 1.--The western North Atlantic, from lat.
35 deg.N-65 deg.N.]

[Illustration: Figure 2.--The western North Atlantic, from lat. 37 deg.N
south to eastern Venezuela.]

[Illustration: Figure 3.--A baleen whale (humpback) showing the main
body parts referred to in the text.]

[Illustration: Figure 4.--A fin whale in the North Atlantic with the
paired blowholes open during respiration. The paired blowholes
distinguish this animal as a baleen whale. (_Photo by W. A. Watkins._)]

DOLPHIN OR PORPOISE

There is still conside