•REPORT ON THE AMPHIPODA. 393 



In the concluding observations he says, " Parmi les commensaus libres se trouvent les Cyames 

 qui se cramponnent a la peau des Mysticfetes et sur plusieurs Cetodontes. C'est le seul 

 commensal de la baleine du Groenland." 



1870. BoECK, Axel. 



(Appendix by Lutken). 



Crustacea amphipoda borealia et arctica. (Sserskilt aftrykt af Vidensk.-Selsk. 

 Forhandliiiger for 1870.) 200 + viii. pages. 



In this prodromus to his greater work, Boeck accepts only two divisions of the Amphipoda, 

 which he calls " HyperidEe. Dana 1852," and " Gammaridee Dana 18-19," although in point 

 of fact, the names which Dana employed for his subtribes of the Amphipoda in 1849 were 

 Gammaracea and Hyperiacea, and in 18.52 were Caprellidea, Gammaridea and Hyperidea. 



In the division Hyperidx Boeck includes two families, Hyperidas and Tryphanid^. Among the 

 former he describes Metoecus dbyssonim, n. s., which he afterwards called Tauria ahyssorum, 

 by G. O. Sars identified with Tauria {Oniscm) Medusarum, 0. Fabr., 1780, for which see 

 Note on BovalUus, 1885. In a new genus, Parathemisto, he includes Tliemisto comjjressa, 

 Goes, and Parathemisto ahyssorum, n. s., synonymous, according to G. 0. Sars, with 

 Hyperia oNivia, Sp. Bate (non Kr0yer), so that the name will be Parathemisto ohlivia. To 

 Tliemisto, Guerin, he assigns Gammarus lihellula, Mandt, and Tliemisto bisjnnosa, n. s. In 

 his family Tryphanida;, he places the new genus and species, " Tryphana Malniii," but 

 according to G. O. Sars, the genus Tryphana is a synonym of Lycxa, Dana, in the family 

 Typhidse, as limited by Glaus. 



In the division Gammaridse. he places : — 



Family I. Prostomatai, containing only Trischizostoma raschii, Esmark and Boeck. 



Family II. Orchestidae, with three genera, Orchestia, Talitnis, and Hyale. 



Family III. Gammaridte, with twenty-two subfamilies, as follow.s : — Subfam. I. Lysinassina (se), 

 Dana, 1849, comprising, together with species not new, Lysianassa pilumosa, n. s., which, 

 according to G. 0. Sars, is the male of Lysianassa costx, Milne-Edwards; " Ambasia 

 Danielssenii," n. g. et s. ; Ichnopus minutus, n. s.; Socarnes, a new genus doubtfully identi- 

 fied with Ephippiphora, White, 1848; Callisoma, Costa, 1851 ; Hippomedon, a new genus 

 to include Anonyx holh<j>lli, Kr0yer, and Lysianassa alnjssi, Goes ; Cyphocaris anmiyx, 

 n. g. et s., named by Lutken, but described by Boeck ; Euryienes, Lilljeborg ; Arisiias, 

 a new genus to receive Anonyx tumiJus, Kr0yer ; Anonyx, Kr0yer, with a new species, 

 "Anonyx Lilljehorgii ; " Onisimus, afterwards corrected to Onesimus, n. g., doubtfully identi- 

 fied with Alibrotiis, Milne-Edwards, 1840, but not including any new species ; Me7iigrates, 

 a new genus to receive Boeck's own species, Anonyx oldnsifrons ; Orchomene, a new genus 

 embracing Anonyx pinguis, Boeck, Anonyx serratus, Boeck, Anonyx minutus, Er0yer, 

 Lysianassa umbo. Goes, which Sars refers to Lepiidepecremn, Sp. Bate, and Orchomene 

 Goesii, n. s.; Trypihosa, n. g., with four species, of which only " Tryphosa H^ringii" is new ; 

 Normania, a new genus to receive Opis qiiadrimana, Spence Bate et Westwood, 1868; 

 Opis, Kr0yer, afterwards altered to Opisa ; Acidostoma, Lilljeborg, Of the new names, 

 Tryphosa is inconveniently near to Triphosa among Lepidoptera. 



Subfam. II. (by mistake printed III.), " Pontoporeinae. Dana 1852," contains Pontoporeia, 

 Kr0yer, witli the species Pontoporeia fenwrata, Kr., Pontoporeia fureigera, Bruzelius, accord- 

 ing to Sars not distinct from /eworate, and Pontoporeia affinis, Lindstr0m ; Priseilla armata, 

 described here as a new genus and species, but in the later work accompanied by the 

 synonym Pontopcn'eia armata, Boeck, 1860 ; Argissa It/pica, n. g. et s.; Bathyporeia, 



(ZOOL. CHALL. EXP. PART LXVII. — 1887.) Xxx 50 



