AKT. 8 CRUSTACEANS FROM WESTERN ATLANTIC TATTERSALL, 15 



Analysis of the above records 



' Approximate. 



Remarks. — This species was captured only in the tropical oceanic 

 area in which it appears to be widely and abundantly distributed. 

 It is clearly not a surface form, only one specimen occurring in 

 18 surface hauls examined. It reaches its maximum abundance be- 

 tween 50 and 150 meters, more than 80 per cent of the specimens 

 coming from between these depths, but it occurred regularly down to 

 the deepest layers examined, though in reduced numbers, 



16. THYSANOPODA MICROPHTKALMA G. O. Sars 



Occurrence 



Station 



10166 

 10172 

 10173 



Depth 



Meters 



1,100-0 



1, 000-0 



200-0 



Speci- 

 mens 



Station 



10182 

 10192 

 10200 



Depth 



Meters 



1, 800-0 



1, 000-0 



50(H) 



Speci- 

 mens 



Remarks. — Apparently widely but sparingly distributed through- 

 out the oceanic area and confined to the deeper layers, at any rate in 

 the adult condition. The specimens from 200 and 500 meters were 

 all less than half grown, the largest measuring 15 mm. Fully adult 

 specimens were captured at 1,000 meters. 



17. THYSANOPODA CORNUTA? lllig 



Occurrence.— Station 10166, 1,100-0 m., 3; station 10172, 1,000-0 

 m., 1; station 10172, 1,800-0 m., 1. 



Remarks. — These larvae measure from 8-13 mm. and show many 

 points of resemblance to those described and figured by Hansen 

 (1912, p. 224, pi. 6, figs, la-lc) and Zimmer (1914, p. 419, pi. 26, 

 figs. 55-58). The similarity is close enough to suggest that they 

 belong to the genus Thysanopoda and to the group containing the 

 species T. cornuta and T. egregia, the position assigned to their 

 larvae by both Hansen and Zimmer. 



