280 THE VOYAGE OF H.M.S. CHALLENGER. 



apparent, exceptions." Of the heart, p. 296, he says, in the Poecilopoda, Isopoda, Amphipoda 

 and Lfemodipoda, it is tubular in form, and occupies the mid-region of the dorsum, sends 

 off arteries before, behind, and laterally, and receives the venous blood through lateral venous 

 orifices." " CapreUa linearis," is figured, pi. xvii. fig. C, and portions of Talitnis on pi. 

 xviii., to illustrate the circulatory system and the anatomy of the branchial organs. He 

 remarks, p. 302, of the Amphipodan family, " the thoracic limbs are commonly said to be 

 transformed into branchije at their bases. The depending edges of the dorsal plates (the 

 epimeral of the tergal arc) are however much more suitably organized than the proximal 

 articulations of the legs. They are penetrated by a very dense system of canals. The 

 epidermis is reduced to an extremely thin and transparent lamina. The component 

 hexagonal cells may be readily observed. The outer or epidermal lamina is united to the 

 opposite parallel lamina by dots of parenchyma. The blood streams in the intermediate 

 passages. These parts therefore correspond in ultimate structure in the most exact manner 

 with leaves of the branchiw of the Crab. " 



1855. BaRTELS. 



Gammarus pulex im Menschenmagen von Battels. Mit einem Zusatz von 

 Troscliel. Verhancllungen des naturhistorischen Vereines der preussischen Rhein- 

 lande und Westpbalens. Zwolfter Jahrgang. Neue Folge ; Zweiter Jahrgang. 

 Bonn, 1855. pp. 113-116. 



Troschel points out that there are possibilities of mistake in such accounts, the more especially 

 as Bartels was not an eye-witness of what had occurred. The specimens sent belonged to 

 Gammarus pulex, Gervais. 



1855. Bate, C. Spence. 



On the Homologies of the Carapace and on the Structure and Function of the 

 Antennte in Crustacea. Annals and Magazine of Natural History. 2d Ser. Vol. 

 XVI. London, 1855. pp. 36-46. (Read at the Linnsean Society, April 17, 1855.) 



The subject of this paper, so far as it concerns the Amphipoda, is discussed at large in the 

 British Association Report by Mr. Spence Bate, for 1855. 



1855. Bell, Thomas, born 1792, died 1880 (W. P. Sladen), and Westwood, J. 0. 



The last of the Arctic Voyages ; being a narrative of the expedition in H.M.S. 

 Assistance, under the command of Captain Sir Edward Belcher, C.B., in search of 

 Sir John Franldin, during the years 1852-53-54. With notes on the natural 

 history, by Sir John Richardson, Professor Owen, Thomas Bell, J. W. Salter, and 

 Lovell Reeve. Vol. II. London, 1855. 



At page 404 the Amphipoda begin, and contain mention of " GarnmiarUs Sabini, Leach ; " 

 " Gamm^crus laricatus, Sabine ; " " Gavimariis hcrreus, Sabine ; " " Gammarus Kroyeri 

 (n. s.). Plate XXXIV. fig. 4. Antennis superioribus inferioribus dimidio longioribus, 

 abdominis segmentis quatuor anterioribus in medio, secundo et tertio ad angulum inferiorem 

 posticum, in dente productis," the English description being followed by the remark that 



