34 



W. LlLLJEBORG, 



The 1 st pair of truncal-feet are long and slender, longer than the 

 2 nd , and their hands have a very small and rudimentary claw, concealed 

 by long bristles, on the back border above the lower and back angle. The 

 hand of the 2 nd pair of truncal feet has the lower and back corner drawn 

 out so as to be almost cheliform. The upper antennae are shorter than the 

 lower; the 3 rd caudal-segment's lower and back corners are rounded off; 

 and the 7 th caudal-segment deeply cloven, &c. 



According to Bruzelius this species is to be met with on our we- 

 stern coasts from Bohuslan to Finmarken. 



5. Gen. AC1DOSTOMA. n. gen. 1 ) 



Forma corporis et antennarum cum genere Anonyds congruit, oris 

 partes appendicular es tamen plane diversae. Labii rami laterales angusti. 

 Mandibulae processu accessorio, maxillae i:mi paris palpo, et palpus maxilli- 

 pedum ungue carentes, et hae partes oris conjunctiva acumen productum prae- 

 bent. Pedes trunci l:mi paris robusti, manu prehensili. Pedes 2:di paris gra- 

 ciles, ungue carentes. 



Of this genus we know of only one species, namely: 



1. ACIDOSTOMA OBESUM (Spence Bate). 



Anonyx obesus, C. Spence Bate: Catalogue etc. pag. 74. 



„ „ C. Spence Bate & J. 0. Westwood: British Sissile-Eyed 

 Crustacea, T. I, p. 98. 



Descr. Corporis forma (fig. 53) obesa, dorso latiusculo et rotundato, 

 epimeris magnis, et pedibus brevibus et robustis, unguibus parum arcuatis, 

 angulis posterioribus et inferioribus segmenti 3:tii caudse obtusis. Longitudo 

 circ. 5 millim. — Color ruber; oculi rotundati, fusci. 



Caput parvum, lobi laterales parum producti. Antenuse superiores 

 (fig. 54) pedunculi segmentis 2:do et 3:tio brevibus, flagello articulis circ. 7 

 quorum primo brevissimo; flagelloque appeudiculari longitudine flagello fere 

 sequali, articulis 5. — Antennae inferiores longitudine superioribus circ. 

 sequales, flagelli articulis 7. 



Labrum (fig. 55, a) vomeriforme, et labii partes laterales sive rami 

 angusti (b, 6), ad apicem acuminati et intus hispidi. Mandibulae (fig. 56) elon- 



') From dx£g a point and crona mouth, because the mouth and its appendages 

 form a long projecting point. 



