KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 22. N:0 7. 



275 



Genus 7. EUTHEMISTO, F. E. GUERIN, 1825. 



Diagn. Caput mediocre, globosum. Perceon leve, epimeris distinctis instructum. Pedes perm priori 

 paris simplices, non subcheliformes. Pedes secundi paris cheliformes; carpus paullo dilatatus, 

 valde productus; processus carpalis anguste concavus, in formam cochlearis redactus. Carpus 

 pedum tertii ac quarti parium dilatatus, simul cum metacarpo instrumentum prensorium 

 formans. Pedes quinti paris ceteris longiores, carpus valde dilatatus ac elongatus; meta- 

 carpus valde elongatus; carpus simul cum metacarpo instrumentum prensorium formans. 

 Pedes parium duorum ultimorum pedibus tertii ac quarti parium longiores. Pedes uri 

 elongati. 



The head is moderately large, globular. The peraion is smooth, and provided with distinct 

 epimerals. The first pair of perceopoda 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, form- 

 ing together with the metacarpus a folding hand. The fifth pair are longer than the 

 others; the carpus is much dilated and elongated; the metacarpus is much elongated; the 

 carpus together with the metacarpus forms a folding hand. The last two pairs are longer 

 than the third and fourth pairs. The uropoda are elongated. 



Syn. 1825. Themisto, F. E. GUERIN. 



H. Milne Edwards. 



1828. 



1830. 



11. 



Latreille. 



1830. 





» 



1831. 



F. 



E. Guerin-Meneville. 



1836. 



P. 



A. Latreille. 



1836. 



F. 



S. Voigt. 



1836. 



II. 



Burmeister. 



1837. 



H. 



Kroeyer. 



1838. 



»Uroptere.» Encyclopedie Methodique. 

 Histoire naturelle. Tome 10 me , p. 772. 



»Memoire sur le nouveau genre The- 

 misto, de la classe de Crustaces». Me- 

 moires de la Soc. d'Hist. nat. de Paris. 

 Tome 4 me , p. 380. 



Extrait de Recherches pour servir a l'Hi- 

 stoire naturelle des Crustaces amphi- 

 podes». Ann. des Sciences naturelles. 

 Tome 20 me , p. 393. 



»Themisto». Dictionnaire classique d'Hi- 

 stoire naturelle. Tome 16 me , p. 222. 



Coiirs d'Entomologie, p. 399. 



Iconographie du Regne Animal de G. 

 Cuvier. Crustaces, p. 22. 



Le Regne Animal — — — , par G. 

 Cuvier. 3 me ed. Tome 2 me , p. 204. 



Das Thierreich — — — vom Baron 

 von Cuvier. 4 ter Band, p. 202. 



Handbuch der Naturgescliichte, 2 te Abth. 

 Zoologie, p. 569. 



»Gr0nlands Amfipoder». Det K. Danske 

 Videnskabs-Selskabs Naturvidensk. 9g 

 Mathemat. Afhandlinger. Bd. 5, p. 

 294 (66). 



