134 , THE VOYAGE OF H.M.S. CHALLENGEK. 



1828. Milne-Edwards, Henpj, borii October 23, 1800, died July 29, 1885 (i^nedlander. 



Naturae Novitates). 



Memoire sur quelques Crustaces nouveaux. Annales des sciences naturelles. 



Tom. 13, pp. 287 to 301. PL 13, 14, 15. 1828. 



The first of these new Crustaceans is considered by Milne-Edwards to be evidently an 

 Amphipod. He says it resembles the Gammarids by its general form, the disposition of 

 the antenn£B, and the appendages under the five first segments of the abdomen; it is 

 separated from them by the structure of the two first pairs of feet, by the form of the 

 terminal segment of the abdomen, and by the long filaments which this latter supports ; 

 these characters, he says, bring it near to Eupheiis, with which it cannot be confounded. 

 Eu2)heus had been withdrawn from the Isopods and placed among the Amphipods by 

 Latreille in his last work, and Milne-Edwards believes that his new genus will here fill up 

 a gap between " les Amphipodes uroptferes et les h^terops," tliough the characters of the 

 Uroptera will require some slight modification. He thus defines the genus RhcBa : — 

 " Quatre antennes dont les superieures sont grosses, bifides, et plus longues que les 

 inferieures, quatorze pattes dont les deux premih-es terminees par une pince et les autres 

 par un ongle croohu ; le dernier article de I'abdomen allonge et supportant deux appendices 

 termines par de longs filamens." The type species Rheea latreillii has now been trans- 

 ferred to the earlier genus Apseudes, Leach, of which Eisso's Eupheus is considered a 

 synonym. Whether this and the other Tanaidee should be reckoned as Amphipods is a 

 matter still sub judice. 



1S28. Steaus-Dukckheim, Hercule Eugene, born 1790 (Hagen). 



Considerations g^nerales sur I'Anatomie comparee des Animaux articules, aux 

 quelles on a joint I'anatomie descriptive du meloloutha vulgaris (lianneton), donnee 

 comme example de I'organisation des coleopteres. Paris, Strasbourg, Bruxelles, 1828. 



In the introduction the author observes that animals had generally been classified in a simple 

 series, but that the natural method is ramified, as Lamarck had first pointed out in his 

 "Hist. nat. des animaux sans vertf'bres, 1815 ; tome P'', p. Af)7." 



In the " Tableau synoptique des animaux articules, avec I'indication des genres par lesquels les 

 classes et les ordres s'avoisinent dans I'^tat actuel de la science," he passes from the first 

 class. Annelids, to the Myriapods as the second class, and from these in a straight line to 

 the third class, the Insects, but through a branching off at the genus Glomeris to the fourth 

 class Crustacea, in which the P"^ Ordre, Isopodes" descends through the "P.^r G.''^ 

 Armadillo " to Sj^hseroma and Proto. At Proto branches off the " 2." Ordre, Parasites," 

 including the genera Nijmphon and Lernaea, while at Splieeroma another branch carries 

 down the lines as follows : — S.'^ Ordre Amphipodes. P.'^'' G"^" Hiella. D."'' G." Phronhna. 

 4« Ordre Stomapodes. P.«' G.'^" Squilla. D.*"^ G."'*' Erichthiis. 5« Ordre Decapodes. 

 1" Earn. Macroures. P.^"^ G."^" Mysis." &c. 



He discusses, pages 33 to 38, the chemical composition of the integument of insects and Crus- 

 tacea, and mentions that what Odier calls clntine, Lassaigne proposed to call Entomeiline, 

 from a/Tofxov, an insect, and uKvfjia, a covering. 



In regard to his order of "Parasites," he says in the introduction, page 17, that in it he places 

 successively " les Nymplwn, les Phoxicliilus, les Pycnogonum, les Cyannis, les Cecrops, les 

 Calygus, les Dichelestion, les Chondracante, et les Lemoea," thus mixing up Cyamus with 

 animals very differently constructed. For Limidus he proposes a separate order with the 

 name Gnathopodes. 



