AMriTiroDA Rynopidra. 23 



Oon. 1. Triscliizostoma. A. BOECK, 18G0. 



Syn. ISOO. TrisrIihofitoiiHi A. BOPXIK. ForliandliiiKcr ved de Skaiid. Na- 



tui-forskcres 8:d(! Miulc. p. 037. 



1865. ,, V\ . LiM,.ii;noriG. "Hidrai? till kilnnedoiticii oni iin- 



(Icrfaiiiiljcn Lysianassina iiioiri 

 imd(nT)r(liiing(;ii Amphipoda bland 

 kriiftdjiirciD). p. 9, in Upsala Uni- 

 vorsitnts Arsskrift, 1805. Mate- 

 malik och Naturvetenskap. 

 ,, ,, ,, ,, ))0n tlie Lysianassa inagellanica», 



etc. p. 17, in Nova .\cta llet^. 

 Snr. So. IJpsalionsis, Scr. Ill, 

 vol. VI. 



1870. ,, ,, A. BoECK "CJrnstaoea horealia (;t arctioa)). 



p. 10. in Christ. VidiMiskabs 

 Selsk. Forliandlinger for 1870. 



1872. ,, ,, De Skandiiiaviske oi? Arktisko 



Ani])hipoder. \). 90. 4:to. 

 Diagu. Corpus latum, non couiprossuni. 



Caput latani, triangnlatiini, ante in rostrum latum, cras.sum, in apicc rotunda- 

 turn, productum. 



OguU grandes, iu medio capiti.'-; non confiucntes, ocellis maguis. 



Antennce primi paris flagcllo multi-articulato instrueta?, articulum ])rinium fla- 

 gelli crassum, elongatum. 



Pedes pereii primi paris mctacarpo permagno, inflato, semicireulari; dactylo iu 

 angulo inferiore posteriore af'fixo. Pedes pereii (juarti paris tibia eiongata, 

 valde dilatata. Pedes trium parium ultimorum daetylis modicis, robustis. 



Pedes uri ultimi paris ramis laneeolatis, iutegris. 



Telson magnum. 



The body is broad, not very compressed. 



The head is broad, triangular anteriorly produced into a broad, 

 thick rostrum, rounded at the tip. 



The eyes are large, not coalesced in the middle of the head, with 

 distinct large ocelli. 



The first pair of antennce with a multi-articulate flagellum, tlie 

 first joint of the flagellum thick and long. 



The first pair of pereiopoda have a very large, tumid, semicircular 

 metacarpus, the dactylus is articulated against the hinder lower corner 

 of the metacarpus. The fourth pair with the tibia ver}^ broad and long. 

 The last three pairs with robust, but not very long dactyli. 



The last pair of uropoda with the exterior rami lanceolate, not 

 bi-articulate. 



The telson is large. 



Only one species is hitherto known. 



