ART. s CRUSTACEANS FROM WESTERN ATLANTIC TATTERSALL 23 



28. NEMATOSCEUS MICROPS G. O. Sars 



Occurrence 



Remarks. — This species has a vertical distribution very similar to 

 that of T. gregaria. It occurred in only 8 out of 46 hauls made at 

 less than 200 meters, but in 17 out of 23 hauls made at greater depths. 

 It appears to reach its maximum distribution between 200-700 

 meters. It is interesting to note that it was caught at the surface on 

 one occasion. 



29. NEMATOSCEUS TENELLA G. O. Sars 



Occurrence 



Remarks. — This species is widely but sparingly distributed in the 

 tropical oceanic area. It is a more distinctly deepwater form than 

 even N. m,icrops. It was never taken at the surface or indeed at any 

 depth less than 100 meters and in only 3 out of 46 hauls made at less 

 than 200 meters. On the other hand it occurred in 15 out of 23 hauls 

 made at depths from 200-1,800 meters. 



Genus NEMATOBRACHION Caiman 



30. NEMATOBKACfflON BOOPIS (Caiman) 



Occurrence. — Station 10158, 600-0 m., 1 specimen; station 10195, 

 100-0 m., 1 specimen. 



Remarks. — This species is apparently much rarer in the western 

 Atlantic than it is in the waters off the European Continent, its 

 place in the former area being taken by the next species. 



