ART. 8 CIRUSTACEANS FKOM WESTERN ATLANTIC TATTEESALL. 



V6 



oil various parts of the cuticle of Euphausians are not infrequent 

 during the larval and post-larval stages. They are most frequently 

 found on the anterior margin of the carapace and on the rostral 

 plate. In some larvae which I attributed to Eu^jJiausia longirostris 

 Hansen, however, serrations on the lower free margins of the cara- 

 pace were present (Tattersall, 1924). The serrations on the present 

 specimen of Bentheuphausia amhlyops are, I take it, the last remains 

 of a similar armature. 



Distribution. — Hansen (1915) recorded two specimens of this species 

 from localities in the West Atlantic off the coasts of America, about 

 7-10° north of the place at which the Bache specimen was captured. 

 These records are the only ones v/ith which I am acquainted from 

 the immediate vicinity of the area explored by the Bache. 



Genus THYSANOPODA H. Milne-Edwards 



13. THYSANOPODA TRICUSPIDATA H. Milne-Edwards 



Occurrence 



,4 nalysis of above records 



Remarlcs. — This species was generally distributed in the oceanic 

 area, but was never very abundant in any haul. The majority of the 

 specimens were caught between 50-150 meters v^^hich would appear 

 to be the zone of its maximum abundance. Only one specimen was 

 taken actually at the surface and only two at less depths than 50 

 meters, while seven were caught in nets fishing at greater depths than 

 1 50 meters. There is a good deal of scattered evidence that this species 

 is a surface form during hours of darkness, particularly in the imma- 



