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



103. Talitrus saltaiur, Mont; 104. Talitms ijlatijchdes, Guer. ; 105. Ordiestia iifforea, 



Mont; 106. "Ordiestia Montagui," Sav. et AucL; 107. " Orchestia Perieri," n. s.; 108. 



"Ordiestia Fisdieri," M.-Edw.; 109. " Lysianassa Costx," M.-Edw.; 110. Lynanasna 



longicornis, n. s. ; HI. " Amphithoe VaiUantii," n. s. ; 112. Gammarus locusta, Mont j 



113. Gammarus fluviatilis, Roes.; 114. "Gammarus OHvii," M.-Edw.; 115. Gammarns 



2)eJoponnesius, Guer. In the "Deuxieme Famille, Ie.s Hyporines. Premifere Tribu, les 



Hyperines GammaroiJes," he gives 116. " Vihilia Jeanrjerardii," n. s. ; in the "Deuxieme 



Tribu, les Hyperines ordinaires," 117. Phronima sedentaria, Forsk.; and in the "Troisieme 



Tribu, les Hyperines anormalcs," 118. Typhis ovoides, Risso. In the " Quatrieme Ordre, 



les Liemodipodes. Premiere FamiUe, les CapreUiens," he gives 119. Caprel/a tahida, 



n. s. 



Occasional notes are made upon the various species. The new ones are described and figured. 



"Ordiestia Perieri," ^\. 5. fig. 1, called in the Brit. ]Mus. Catal., " AlJordiestes Pereiri," 



now becomes Hyale perieri. Lydanassa longicornis, pi. 5. fig. 2, "Long. 10 millim. larg. 



3J k 4 miUim.," is thus defined, " antennis primis sat elongatis, prime articulo infra fortiter 



spinoso ; secundis elongatissimis ; pedibus spinosis, posticorum primis articulis subtiliter 



denticulatis." Besides the very pronounced spine at the lower distal end of the first joint 



of the peduncle of the upper antennae, we learn that "leur filet accessoire est assez court." 



"Les yeux sont tres-grands et reniformes." The telson is "assez fortement creuse en cuUler 



et termine en pointo arrondie postt'rieurement. Les stylets terminaux des fausses pattes des 



trois derni^res paires sont assez aUongees." The highly useful information is also given that, 



" La premifere et la seconde paire de pattes ne presentent rien de remarquable." The figure 



2& shows the upper antenna with a thick first joint having infero-distally a small process and 



a long spine, the second joint not much shorter than the first, and two and a half times as 



long as the third. Spence Bate adopts the name for a British species, to which he does not 



assign any spine on the upper antenna, and of which he says (Brit. Sess. Crust, i. p. 88), 



"the central tail-piece exhibits no peculiar character." According to G. O. Sars, 1882, 



Lysianassa longicornis, Sp. Bate, is the male of Anonyx edwardsii, Sp. Bate, and is 



renamed " Ordiomene Bate.i," G. 0. Sars, although the first gnathopods as figured and 



described by Bate and Westwood do not agree with the definition of tlie genus Ordiomene. 



Heller in 1866 gives a fresh description and figures of Lysianassa longicornis, Lucas, with a 



long process instead of a spine on the upper antennae. By the antennae this species 



approaches Costa's genus Idmojnw. 



" Amphithoii Vaillantii," -^l. 5, fig. 3, "Long. 12 k 17 milHm. larg. 3 a 4 millim.," is thus 



defined : — " flavescens, subtiliter viridi ^junctata; antennis mqualibus, fortiter cUiatis; pedibus 



primi paris brevibus, secundi paris elongatissimis, penultimo articulo valde emarginato, ad 



basin spina instructo ; corpore Isevigato." In regard to this species see Note on Prof. 



Catta, 1876. 



" Vibilia Jeangerai'dii," pi. 5, fig. 4, "Long. 10 millim. larg. 3 millim.," is thus defined: — 



" rubro subtiliter laxcque maculata ; antennis primi paris levigatis, anticr obtuse truncatis, 



secundi paris brevibus ; pedibus levigatis, penultimo articulo paulisper arcuato ; septinio 



segmento abdominis supra trUobato, penultimo anticfe transversim depresso." It is near 



" Vihilia Peronii," M.-Edw., but differs from it "par la tete, qui, a son sommet, est moius 



acuminee ; le dernier article des antennes superieures est aussi plus allonge et surtout 



beaucoup plus obtusement tronque h sa partie inferieure que dans la V. Peronii." 



Moreover in Vihilia jeangerardii the lower antennae, he says, are a little more than half as 



long as the upper, while in the other species they are much longer than the upjier 



antennae. 



Caprella tahida, pi. 5, fig. 6, is identified by Mayer with Caprella acuti/rotis, LatreiEe. 



