294 



CARL BOVALLIUö, AMPHIPODA HYPEKIIDEA. 



HYPElUin^. 



2. EUTHEMISTO ANTARCTICA, J. D. DANA, 1852. 



lliemisto avtarcttca, Dana. Themisto antarctica, Dana. Themisto Guerinii, Spence Bate. 



Facsiiiiile from Dana. U. S. Expl. Exp. Facaimile from Spenck Bate. Cat. Amplj. Criist. Brit. Facsimile from Spence Bate. Cat. Amph. 

 Crust., pl. (39, lig. 1. Museum, pl. 50, fig. S. Crust. Brit. Museum, pl. 50, fig. 9. 



Fig. 1. The aniraal from tlie side. Fig. 4. The aiiiuial from the side. 5. The Fig. 7. The aninial from the side. 



2. The first pair of autenna'. first pair of periieopoda. 6. The .secoiid pair. 8. The first pair of antennae. 



3. The seoond pair. 9. The first pair of perseopoda. 



10. The secoiid pair. 



Diagn. Corpus carinatum. Femviv pednm perai parium triiini ultimoruin modice dilatatum, plus quain 

 duplo longius quain latius. Tibia pedum quinti paris quam genu duplo longior, post pro- 

 ducta, processum formans dimidio stipitis articuli niulto breviorem; dactylus levis. Pedes 

 uri primi paris pedes secundi paris superantes; pedunculus ramo interno longior; ramus 

 externus pedum secundi ac tertii parium ramo interno paullo brevior. Telson dimidio seg- 

 menti ultimi uri paullo longius, pedunculam pedum uri ultinii paris latitudine ajquans, ac 

 quarta parte longitudinis pedunculi ejusdem brevior. 



The hody is carinated. The femur of the last three pairs oi perceopoda is moderately dilated, 

 being more than twice as long as broad. The tibia of the fifth pair is twice as long as 

 the genu; the lower hind corner is produced into a process, whicii is much shorter than 

 half the rest of the joint; the dactylus is smooth. The first pair of uropoda reach beyond 

 the apex of the second pair; the peduncle is longer than the inner ramus; the outer ramus 

 of the second and third pairs is a little shorter than the inner. The telson is a little more 

 than half as long as the last ural segment; it is as broad, and less than a fourth part as 

 long, as the peduncle of the last pair of uropoda. 



Colour. Brownish red. 



Length. 15 — 25 mm. 



Uab. The Antarctic region; the Southern temperate regions of the Atlantic, of the Indian 

 Ocean, and of the Pacific. (D. M.; F. M.; K. M.; P. M.; S. M.; U. M.) 



