368 CARE CBLOVEA TRE TE OCSESEAERAO TTO SAN UD SEA INSTANS OMP ETC SEE NVS PIPER MEDIS: 
4. Parathemisto trigona, Dana, 1852. 
Syn. 1852. Hyperia trigona. Dana. United States Exploring 
; Expedition. <Crustacea. 
Vol, 2, p: 987, pl367, os 
1885. Parathemisto > >» CO. Bovallius. »Systematiecal list of the 
Amphipoda Hyperiidea.» 
Bih. till K. Svenska Vet.- 
Akad. Handl., Bd 11, N:o 
105-106 
P. trigona is characterized by the unarmed carpal process 
of the second pair of pereiopoda, by the very short dactyli of 
the third and fourth pairs and by the scarcely serrated rami 
of the uropoda. 
Length 25—30 mm. 
Hav OR Cape” Hörn. (Diana) 
Genus 6. Huthemisto, Guérin, 1828. 
Syn. 1828. Themisto. Guérin. »Mémoire sur le nouveau genre 
, Thémisto, de la classe des Crus- 
tacés.> Mém. de la Soc. d”hist. 
nat. de Paris. Tome 4:me, p. 1. 
1887. Futhemisto. > C. Bovallius. »Systematical list of the Amphi- 
poda Hyperiidea.» Bihb. till K. 
Svenska Vet.-Akad. Handl., Bd 
ill NEO IG, ja. Al 
This genus differs from Hyperia by the narrow, gauge- 
shaped carpal process of the second pair of pereiopoda; the 
carpus of the first pair being broad, but not produced. From 
Parathemisto it differs by the strong development of the fifth 
pair; this latter characteristic however is not of any higher 
value, as there are transitions between the two genera. 
1. Euthemisto Gaudichaudi, Guérin, 1828. 
Syn. 1828. Futhemisto Gaudichaudui. Guérin. LL. ce, p. 7, fig. 1—17. 
It is characterized by the carpal process of the second pair 
of pereiopoda being provided with long hairs, without terminal 
spine, by the exterior and interior rami of the uropoda being 
equal in length, and by the minute, triangular.telson. 
Length 26 mm. 
Hab. Off the Falkland Islands. 
