SCHIZOPODA AND CUMACEA 



H. J. HANSEN 



I. - The Order EUPHAUSIACEA (') 



The material comprises two adult species, one of which is new to science, a few very 

 young or not fully developed spécimens of two other species, and a number of larvae belonging 

 to two species. It is often difficult and not infrequently impossible to détermine half-grown 

 spécimens and especially larval forms vvhen tolerabl}^ complète séries of stages are not to hand, 

 and the difficulties become increased when the material is proportionately scanty, not containing 

 several of the forms inhabiting the sea in question. Fortunately I am able to name nearly the 

 whole material from the Belgica, but one species represented by two larval stages remains 

 uncertain. I describe, however, and give analytical figures of ail larval stages in the collection, 

 especially because the métamorphoses of the two species differ from one another and présent 

 features differing in a very interesting way from the development of a species of the same 

 genus workecl out by G. O. Sars in the Challenger report. 



A. — ADULT AND NEARLY HALF-GROWN SPECIMENS 

 i. — Euphausia superba Dana 



In 1906 Holt & Tattersall made out that E. superba sensu G. O. Sars is the adult 

 maie, E. Murrayi G. O. S. the adult female, E. antarctica G. O. S. the immature form of the 

 same species, furthermore that E. glacialis Hodgson and E. australis Hodgson are to be cancel- 

 led as synonyms to E. superba. I can fully confirm thèse statements. 



Occurrence. — Lat. 70 20' S., long. 85° 52' W., about twenty spécimens taken « dans 

 une fente de la banquise antarctique, près de la surface, 27 décembre 1S98 »; nearly ail the 

 spécimens are moderately large, but none really full-grown. — Lat. 70° 54' S., long. 89 18' W., 

 about twenty spécimens from the stomach of Eobodon carcinophaga ; how common it must be is 



(1) The name Schizopoda is used in the title only because it is brief and still generally used ; the two orders 

 Euphausiacea and Mysidacea are in reality far from closely related to each other. 



