SCHI2:0P0DA, STOMATOPUDA, AND NON-ANTARCTIC ISOPODA. 873 



Current, but rather further south. It is only known from five other specimens, three 

 recorded by Hansen from the North Atlantic, one by Hansen from the East Pacific, 

 and the type, captured by the Valdivia in the South Atlantic. It is one of the 

 largest known Euphausians. 



Thysanopoda tricuspidata, Milne-Edw. 

 Scotia. 



Station 29, lat. 12° 31' N., long. 25° 9' W., tow-net— Two. 

 Station 42, lat. 5° 25' N., long. 26° 7' W., tow-net.— One, larval. 



Discovery. 



Lat. 12° 27' S., long. 33° 33' W., tow-net.— One. 



Lat. 13° 59' S., long. 34° 35' W., tow-net.— One large female, 22 mm. ; 



three larvse, 5-8 mm. 

 Lat. 17° 15' S., long. 32° 05' W., tow-net.— Five. 



All these specimens were caught at the surface, and, with the exception of the 

 large female, 22 mm., captured by the Discovery, are all larval or post- larval in 

 development. 



Genus Euphausia, Dana. 



Euphausia Krohnii (Brandt). 

 Discovery. 



OiF Madeira, tow-net. — Fifteen. 



This species seems at last to have found a name which may be considered more 

 or less a permanent one. It has been known during the last ten years successively as 

 Euphausia pellucida, bidentata, and Millleri; but Hansen (1910) has definitely 

 established that Thysanopoda Krohnii, Brandt, an earlier name than any of the 

 above, was applied to specimens identical with those of the later species. By this 

 name, therefore, the species must henceforth be known. 



Euphausia americana, Hansen. 



A', americana, Hansen, 1911. 

 Scotia. 



Station 14, lat. 21° 28' N., long. 22° 40' W., tow-net.— Five. 

 Station 18, lat. 19° 59' N., long. 23° 34' W., tow-net.— Four. 

 Station 26, lat. 14° 33' N., long. 25° 9' W., tow-net.— Two. 

 Station 29, lat. 12° 31' N., long. 25° 9' W., tow-net.— Thirteen. 

 TKANS. ROY. SOC. EDIN., VOL. XLIX. PART IV. (NO. 16). 119 



