248 



CAEL BOVALLIUS, AMPHIPODA HYPERIIDEA. I. 2. 



HYPERUD^. 



Genus 6. PARÅTHEMISTO, A. BOECK, 1870. 



Diagn. Cajmt mediocre, globosum. Pe7-a>on leve, epimeris distinctis iustruetum. Pedes percei primi 

 paris simplices, nou subcheliformes. Pedes secundi paris chelifornnea; carpiis pauUo di- 

 latatus, valde productus, processus carpi anguste concavus, in formam cochlearis redactus. 

 Carpus pedum tertii ac quarti parium dilatatus, simul cum metacarpo, instrumentum pren- 

 sorium formans. Pedes parium trium ultimorum longitudine subaäquales, duobus pra3- 

 cedentibus multo longiores; carpus non dilatatus; nietacarpus valde elongatus. Pedes uri 

 eiongati. 



The head is moderately large, globular. The peraon is smooth, provided with distinct epi- 

 merals. The iirst pair of jjerawjyoda are simple, not subcheliform. The second pair are 

 cheliform; the carpus is a little dilated, and much produced; the carpal process is narrowly 

 concave, gouge-shaped. The carpus of the third and fourth pairs is dilated, forming to- 

 gether with the nietacarpus a folding hand. The last three pairs are subequal in length, 

 and much longer than the third and fourth pairs; the carpus is not dilated; the nieta- 

 carpus is much elongated. The uropoda are elongated. 



Syn. 1870. Parathemisto, A. BOECK. 



G. O. Särs. 



1872. 



1882. 



C. BovALLius. 1887 . 



1887. 



Th. Stebbing. 1888. 



»Crustacea Araphipoda borealia et arctica». 



Christiania Videnskabs-Selskabs Forliaiidl. 



for 1870, p. 87 (7). 

 De Skandinaviske og Arktiska Amphipoder, 



p. 84. 

 »Oversigt af Norges Crustaceer med fore- 



l0bige Bemaerkninger över de nye eller 



mindre bekjsendte Arter». Christiania Vi- 



denskabs Selskabs Forhandl. for 1882, 



N:o 18, p. 20. 

 »Systematical list of the Amphipoda Hyperii- 



dea». Bih. t. K. Sv. Vet. Ak. Handl. 



Bd. 11. N:o 16, p. 20. 

 »Arctic and Antarctio Hyperids». Vega- 



Exp. Vetensk. Iakttagelser. Bd. 4, p. 566. 

 »Report on the Amphipoda». Voy. of H. M. S. 



Challenger. Zoology. Vol. 29, p. 1419. 



The genus Parathemisto was instituted in 1870 by A. Boeck who gave the 

 following diagnosis : 



«Corpus sat compressum; dorso carinato. Mandibulfe in apice perlata^, serrata3, asqve ut 

 mala interna; tuberculo molari latissimo, in margine crenato; palpo longissimo. Maxillje Imi paris 

 dentibus quatuor perlongis et firmis armatfe. Pedes 2di paris (non pedes Imi paris) carpo in 

 angulo inferiore posteriore valde producto; manu cheliformi. Pedes 3tii 4tiqve paris articulo 4to 

 subdilatato. Pedes trium parium ultimorum subajqvales.» 



