REPORT ON THE AMPHIPODA. 139 



" Les Chevrolles. (Caprella. Lamck.)." Of these the generic description is given, and in the 

 note references appear to various species \yhich are, not whoUy without reason, criticised as 

 doubtful. 



Of the ovalia Latreille says, " Ces Isemodipodes forment le sous-genre Des Ctames proprement 

 dits. (Cyamds, Latr., — Larunda, Leach.) 



"J'en ai vu trois esp6ces, qui viveut toutes sur des cetaces, et dont la plus connue, le Cyame de 

 la baleine {Onisaus ceti, Lin.; Pall., Spicil. zool., fasc. IX, iv, 14; Squille de la haleine, 

 Deg(5er., Ins., VII, 6, vi ; Ptjcnogonum ceti, Fab.; Savig., Mom. sur les anim. sans vert., 

 fasc. I, V, 1.) se trouve aussi sur le maquereau ; les pecheurs I'ont designee sous le nom de 

 Pou de haleine. Une autre espece, trfes analogue, a etc rapportee par feu Delalande de sou 

 voyage au cap de Bonne Esperance. La troisiemo, beaucoup plus petite, se trouve sur des 

 cetaces des mers des Indes orientales." 



1829. MuLLEE, JoHANNES, boru 1801, died 1858 (Hag-en). 



Sur la Structure des Ycux clu Hanneton (Mcloloutlia vulgaris). Annale.s des 

 Sciences naturelles. Tome dix-liuitieme. Paris, 1829. p. 107. 



In this letter to the editors Jliiller criticises Straus-Durckheim's views on the eyes of insects, 

 and Straus-Durckheim replies to him at p. 463 of tlie same volume. MiiUer refers to 

 Straus-Durckheim's description of the eye of Daphnia, and adds " c'est la meme structure 

 que j'ai observce moi-mume dans les Monoculus apus, Gaimnanis pidex et Cyamus ceti," and 

 in a note to this passage he says, " Voyez mon second Memoire sur la structure des yeux 

 chez les insectes et les crustaces. — Meckel's, Archiv fur Anatomie und Pliysiologie. 1829. 

 H. i." 



1829?. Straus-Durckheim, H. E. 



Memoire sur les Hiella, nouveau genre de Crustaces Ampliipodes. Memoires 

 du Museum d'Histoire Naturelle. Tom. xviii. pp. 51-G2. PI. 4. Paris, 1829 ? 



This author considers that the Amphipods are distinguished from the Isopods, because " in the 

 Amphipods the mandibles are palpiferous ; the front pairs of feet are directed forwards, and 

 the hinder backwards ; the abdomen, generally flexed underneath, carries several pairs of 

 bifid false feet, like those of the Decapoda macroura, and the last which corresponds to the 

 lateral appendages of the hinder segment in many Isopods, generally preserves the form of 

 the other false feet, and is not enlarged into swimmerets. The most obvious characters to 

 distinguish the two orders are the presence or absence of the mandibular palp, that 

 presented by the branchiae, and that offered by the form and arrangement of the abdomen," 

 Hiella he regards as a link between the two orders. He recognises its affinities with 

 Themisto, Phronima, Hyperia, but is led away from perceiving its identity with the last by 

 the inaccuracy of Latreille's definition. The genus Hiella is characterised as follows : — 

 " Tete hemispherique, quatre antennes com-tes en alene de quatre articles ; bouche saillante, 

 compos6e d'un labre, d'une pairs de mandibules, de deux paires de machoires et d'une levre 

 inferieure terminee par deux lobules ; le tronc et I'abdomen chacun de sept segmens mobiles; 

 sept paires de pates ambulatoires, dont quatre dirigees en avant et trois en arrifere; une paire 

 de fausses pates h chaque segment abdominal." The type species, " Hiella Orbignii," from 

 near Rochelle, does not appear to be mentioned in the Erit. ^Mus. Catalogue. Milne- 

 Edwards, 1840, regards it as a synonym of his Hyperia latreillii, and both are by Boeck 



