REPOET ON THE AMPHIPODA. 107 



dermis of tins whale, particularly about the fins and anus," p. 166. For July 18 it says, 

 "The monodon appeared in great number this day, and the Thomas's men succeeded in killing 

 one male and two females : the latter were destitute of the tooth : they are always taken 

 without that instrument, which is solely conferred on the male either for ornament or annoy- 

 ance : .... a female whale (balfena mysticetus) killed this day, measured sixty feet : it 

 received the harpoon but once, and dived away under the ice, drawing down three boats' lines, 

 being 1080 fathoms, and died at the bottom : immense groups of the oniscus ceti attached 

 to the under lip and to the under part of the fins : the edge of the fleshy covering embracing 

 the root of the monodon's tooth was covered with insects of the same description." 



1818. Leach, W. E. 



Crustaces, Crustacea. Dictionnaire cles Sciences Naturelles, dans lequel on 

 traite metliodiquement des differens etres de la nature, &c. Tome douzieme. 

 Strasbourg, Paris, 1818. pp. 69-75. 



The Crustacea are said to form two great groups or subclasses, of which the first comprises the 

 Malacostraca, which has a pair of mandibles, and two pairs of maxillae, furnished with 

 palps, and eight pairs of feet provided with branchiae at their bases. All the genera devoid 

 of these characters belong to the second group, the Entomostraca. Leach then briefly 

 reviews the various classifications of Crustacea, including those by himself, that had been 

 proposed up to the date of this article. He gives a list of authors who have written on 

 Crustacea, and deferring the details about genera and species to the articles on the several 

 families, he winds up with an alphabetical list of the Crustacean genera recognized at that 

 date, including for the Amphipoda, Aerope, Ampifhoe, Atyle, Caprelle, Cerapiode, Coropiliie, 

 Crevette, Dexamine, Jassa, Larunde, Leucotkoe, Melitee, Orcliesiie, Pheruse, Phronyme, 

 Podocere, Profo, TaHfre, Typhis, mixed up in alphabetical order with the rest. That Aerope 

 belongs to the Amphipoda, my ouly authority is Desmarest. 



1818. Leach, W. E. 



Memoirs of the Wernerian Natural History Society. Vol. IL For the years 

 1811-1816. Edinburgh, 1818. 



Leach refers to this volume for his species, Jassa pulchella and Jassa pelagica, but since the 

 references occur in the Appendix to his Article, Crustaceology, in the Edinburgh Encyclo- 

 paedia, which cannot well be of later date than 1814, and these memoirs seemingly were 

 not published till 1818, he probably refers to some paper intended for this volume, but 

 withdrawn before publication. 



1819. Leach, W. E. 



Zoological Memoranda. Descriptions of the New Species of Animals, discovered 

 by His Majesty's Ship Isabella, in a Voyage to the Arctic Eegions. By Dr. W. E. 

 Leach. A Voyage of Discovery, made under the Orders of the Admiralty, in His 

 Majesty's Ships Isabella and Alexander, for the purpose of exploring Baffin's 



