1910.] The Cetacea. 413 



1754. Brisson makes a separate class of the Cetacea coordinate with the 

 other Maminaha. 



1779. Blumenbach places the order Cetacea at the end of the Mam- 

 malia, following the aquatic or semiaquatic "Palmata." 



1780. Storr gives the Cetacea subclass rank in the "phalanx Pinnata." 

 1795. Geoffroy and Cuvier group "les Cetacees" with other aquatic 



mammals under the order " Amphibies." 



1800. Cuvier excludes the seals from "les Cetaces," which now em- 

 braces only Sirenians and Cetaceans; the two great "families" forming a 

 grand division of the mammals ("les mammiferes a pieds en nageoire"). 



1816. De Blainville suggests that the Cetacea represent an anomalous 

 modification of the edentate type. He divides the "ordre Edentes?" into 

 two groups: "Normaux, Edentes" and "Anomaux, Cetaces?". 



1817. Cuvier divides "les Cetaces" into two sections, P "Herbivores" 

 [Sirenians], 2° "Ordinares" (true Cetaceans). The latter he subdivides 

 into: 1° those "d petite tete" ("Dauphins, Narvals") and 2° those "d 

 grosse tete ("Cachalots, Baleines"). 



The idea that the Cetacea and Sirenia were allied persisted for a long 

 time, Owen in 1866 still grouping the two orders in a division "Mutilata" 

 coordinate with the "Unguiculata." 



1826-1866. Gray clears the ground for further work by careful de- 

 scriptions of actual material and by correctly grouping the genera into 

 families. 



?1849 (or earlier). Eschricht (quoted by Gray), one of the great names 

 in Cetology, in his Nordischen Walthiere proposes the following interesting 

 partition of the order: 

 "1. Sarcophagen: Orca. 



2. Teuthophagen : Pkijseter, Rhi/nchotoccte {Hypcrodontma Gray), 

 Monodon, Beluga, Globioceps. 



3. Ichthyophagen : Phocoena, Delphinus, Ogmohalocna, [= Balcenop- 

 tera]. 



4. Pteropodophagen : Leiobaloena Eschricht [= Catena]." 

 He further proposes to separate these groups into 



I "Zahnwalle," namely, groups 1-3 except Ogmohalcena. 



II " Bartenwalle," Bahienoids, including Ogmobalwna {Balccnoptcra). 

 1864. Gray proposes the subordinal terms "Denticete," "Mysticete." 

 1861-1882. Van Beneden publishes a series of important memoirs on 



the fossil Cetaceans of Belgium. He groups the genera Squalodon, Stenodon 

 and Zeuglodon into an order "les Zeuglodontes " parallel to the Sirenians 

 and "Cetedontes" as a division of the "Thallasotheriens." 



1864-1891. Flower makes many contributions to Cetology. In 1891 



