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



abdominis ultimi paris biramei, ramis elongatis." To this genus Bruzelius refers nine 

 species ; in section a, " dors^Lm magis minus ve carinatum, posticum saepe dentibus 

 armatum," L ParamphWioe panopla, Krbyer, by Bate, Boeck and Sars now called 

 Plcustes panoplus ; 2. Paramphithoe pulcliella, Kroyer, by Bate called Pherusa pjulchella, 

 by Boeck Pleustes pulchellus, by Sars, 1882, Paramphithoe pulchella ; 3. Paramphithoe 

 hystrix, Owen, for wliich see Note on Lepechin, 1780 ; 4. Paramphithoe compressa, 

 Liljeborg, identified by Boeck with " Atylus Sicammerdarnii" MUne-Edwards ; in section 

 J, " dorsum rotundatum, segmentis duobus aut pluribus postice dentatis ;" 5. Paramphi- 

 thoe hicuspis, Kroyer, by Bate referred to Ph.erusa, by Boeck to Pleustes, by Sars, 1882, 

 back to Paramphithoe; 6. Paramphithoe tridentata, n. s., pi. iii. fig. 13, by Boeck in 

 1870 named Halirages tridentatus ; 7. Paramphithoe elegans, n. s., pi. iii. fig. 14, by 

 Boeck identified with Dexuinine bispinosa, Spence Bate, under the name Halirages 

 hisjnnosa; iu section c, "dorsum rotundatum, carina et dentibus destitutum;" 8. Par- 

 amphithoe Ixviuscula, Kroyer, now known as Calliopius Ixviusculus ; 9. Parampihithoe 

 norvegiea, Eathke, now known as Calliopius norvegicus, Eathke. Thus it appears that all 

 the species assigned to Paramphithoe by the founder of the genus fall t6 older genera, 

 with the exception of Owen's hijstrix and the new species tridentata; this latter he 

 defines : — " Caput rostro perpusillo iustructum. Dorsum rotundatum, Iseve, segmenti 

 septimi thoracis, primi secundique abdominis margine medio posteriore dentem acutum 

 formante. Antennae superiores inferioribus longissimis multo breviores. Pedes primi 

 secundique paris manu fere oblongo-ovali, mediocris magnitudinis, instructi. Appendix 

 caudalis indivisa, margine posteriore truncato efc dentato." If Boeck's Acanthozone is 

 accepted as the generic name for Owen's hystrix, Paramphithoe tridentata, Bruzelius, 

 I remains over to represent the new genus, and would, I imagine, take precedence of 



Boeck's Halirages, unless we may argue- that the genus instituted by Bruzelius lapsed 

 through the want of any suitable definition, coupled with the want of any species selected 

 as the type. 

 After describing Acanthonotus serra, Kroyer, Dexamine tenuicornis, Eathke, and Iphimedia ohesa, 

 Eathke, Bruzelius proceeds to define the genus Ampelisca, Kroyer, identifying with it 

 Costa's Araneops. He assigns to it six species (1) xquicornis, n. s., pi. iv. fig. 15 ; (2) 

 tenuicornis, Liljeborg ; (3) Ixvigata, Liljeborg ; (4) macrocephala, Liljeborg ; (5) ^^Gaimardi," 

 Kroyer, by Boeck in 1870 named " Byhlis Gaimardi ;" (6) Ampelisca carinata, n. s., pi. 

 iv. fig. 16, in which the front part of the back is rounded, and which therefore differs from 

 the Ampelisca Gaimardi {Tetroinatus tyjiicus), Spence Bate, which has " cephalon and 

 pereion laterally compressed and dorsally cuneated." 

 Bruzelius next describes Haploopis tiMcola, Liljeborg ; Haploops carinata, Liljeborg ; Bathyporeia 

 pilosa, Lindstrom. In the last he has noticed the variations in the antennae, which subse- 

 quently occasioned the institution of new species. 

 In the genus (Ediceros, he describes (1) CEdiceros obfusus, n. s., pi. iv. fig. 17, identified by 

 Boeck with Leucothoe phyllonyx, M. Sars, under the name Aceros pihyllonyx ; (2) (Ediceros 

 affi.7iis, n. s., pL iv. fig. 18, by Boeck called Monoeidodes affinis, as also earlier by Spence 

 Bate, who gives it priority over his own Monoculodes stimpsoni, whereas J. S. Schneider 

 inclines to identify Monoeidodes affinis, Boeck, with Alonoculodes stimpsoni, Bate, and 

 definitely makes (Ediceros affinis, Bruzelius, a synonym of Monoculodes carinatus, Spence 

 Bate ; (3) (Ediceros saginatus, Kroyer. 

 He describes " Leucothoe clypeata (Kroyer) ?," which Boeck calls " Mefopa Bruzelii," Goes. 

 Bruzelius notices that his specimens diifered somewhat in the antennae and gnathopods from 

 Kr0yer's description, but was content to regard them as the young of Kr0yer's species. Sars, 

 in 1882, considers that the form described by Boeck is not the true Metopia Bruzelii, Goes, 

 but a distinct species, which he names Metopa borealis, distinguished by its more considerable 



