630 



FISHERIES OF THE UNITED STATES. 



which are doubtfully common to both the Northeastern and North 

 western Atlantic: 



Species occurring in the 

 Northeastern Pacific 

 but not in the xYtlantic. 



Bakena Sibbaldii 



Balaenoptera Davidsoni 

 Balaenoptera velifera . . 



Sibbaldius sulfureus 



Megaptera versabilis . . 

 Rhachianectes glaucus 



Kogia Floweri . 

 Ziphius Bairdii . 



Berardius Grebnitzki 

 Grampus Stearnsii 



Globiocephalus Scam- 



moni. 

 Phocaena vomerina 



Orca paciflca 



Orca atra 



Orca atra var. fusca 



Orcarectipinna 



Leucorhainphus borealis 

 Delphinus Bairdii 



? Delphinus etyx 



? Delphinus albirostratus 

 Lagenorhynchns obliqui- 



dens. 

 Lagenorhynchus tricolea 



Species occurring in 

 both the North Paci- 

 fic and .North Atlan- 

 tic. 



Balsena mysticetus . 



Physeter macrocephalus 



Species occurring in the 

 Northwestern Atlan- 

 tic but not in the 

 Northeastern Atlan- 

 tic nor in the Pacific. 



Sibbaldius tuberosus . 

 Sibbaldius tectirostris 

 Megaptera bellico3a . . 

 Agaplielus gibbosus . . 



Species occurring in 

 both the Northeast- 

 ern and Northwest- 

 ern Atlantic. 



Monodon uionoceros . . 

 Delphinaptorus catodon 



Kogia Goodei . 



Balsena mysticetus. 

 Balaena biscayensis. 

 Balaenoptera rostrata. 

 Balasnoptera m u sc ul us. 

 Balasnoptera robustus. 

 ;Sibbaldius laticeps. 



Megaptera boops. 



Physeter macrocepha- 

 lus. 



Hyperoodon rostra- 



tum.* 

 Ziphius cavirostris. 

 JMesoplodon Sowerbien- 

 Hyperoodon seniijunctus' sis. 



I Grampus griseus. 



Monodon monoceros.* 



Delphinapterus declivis" Delphinapterus cato- 



don. 

 Delphinapterus concre- \ 



tus.* 

 Delphinapterus rhino- ! 



don.' 

 Globiocephalus bra- 



chypterus. 

 Phocaena brachycion . . 

 Phocaena lineata 



Globiocephalus melas 



Delphinus erebennust . . 

 Delphinus janira 



Tursiops Gillii. 



Lagenorhynchns guber- 



nator. 

 Lagenorhynchus perspi- 



cillatus. 



Tursiops subridens 



Steno fuscus 



Orca gladiator. 



jDelphinus euphro- 



syne.* 

 Delphinus delphis. 

 Delphinus acutus.* 

 Delphinus albirostris.* 



Lagenorhynchus leuco- 

 pleurns. 



Tursiops truncatus. 



* Recorded in the Western Atlantic only from Greenland. 



V'Delphinus bombifrons, Cope," of the catalogue of the Philadelphia Exhibition of 1876, is a fictitious 

 species. 



THE ECONOMIC VALUE OF THE CETACEANS. 



Among all Cetaceans the size of a species has a direct bearing upon 

 its economic importance. Oil being the principal product furnished by 

 these animals, their commercial value depends to a large degree upon 

 the relative amount of that product which they furnish. The subcu- 

 taneous layer of fat or "blubber," which is very extensive in the larger 

 forms, such as the Baleen Whales, becomes insignificant in amount in 

 the Dolphins and Porpoises, and the latter are therefore comparatively 

 valueless. Among species of about equal proportions, a secondary 

 element of value depends upon the quality of the oil furnished. Sperm 

 oil has a higher commercial value than oil from Baleen Whales, and 



