AEROPSIS FULVA. 135 



Key to the Species Aeropsis. 



Height of test exceeds one half length; sternum keeled roslrata. 



Height of test less than one half length; sternum not keeled fulva. 



Aeropsis rostrata. 



Aerope rostrata Norman, 1876. Proc. Roy. Soc. London, 25, p. 212. 

 Aeropsis rostrata Mortensen, 1907. Ingolf Ech., pt. 2, p. 90. 



The authority for the name rostrata is universally given as Wyville Thomson 

 but Norman's description is ample and antedates Wyville Thomson's by some 

 months. The fact that Norman gracefully calls the name Wyville Thomson's 

 does not affect the case. The specimens before me are 37 mm. long and nearly 

 20 mm. high. The keel on the sternum is slight but distinct when the speci- 

 mens are compared with fulva of nearly the same size. 



Station 2042. Between Cape May, New Jersey, and Nantucket, Western 

 Atlantic. Bott. temp. 38.5°. 1555 fms. Glob. oz. 



Station 2043. Between Cape May, New Jersey, and Nantucket, western 

 Atlantic. Bott. temp. 38.5°. 1467 fms. Glob. oz. 



Two specimens. 



Aeropsis fulva. 



Aerope fulva A. Agassiz, 1898. Bull. M. C. Z., 32, p. 81. 

 Aeropsis fulva Mortensen, 1907. Ingolf Ech., pt. 2, p. 94. 



The specimens before me are from widely separated stations. There can 

 be no doubt that those from 4672 are fulva, and I cannot find any satisfactory 

 reason for considering those from 4766 as anything different. The specimens 

 from the latter station have rostrate pedicellariae similar to those described 

 and figured by Koehler for the Siboga specimens, while none of the four speci- 

 mens from 4672 have any rostrate pedicellariae at all. The largest of the 

 specimens from 4672 is 35 mm. long by 16 mm. high. The specimens from 

 4766 are fragmentary but the larger was apparently about 40 mm. long. 



Station 4672. Eighty-eight miles southwest of Palominos Light House, 

 Peru. Bott. temp. 35.2. 2845 fms. Fne. dk. br. inf. m. 



Station 4766. Between Atka Island and Bowers Bank, Bering Sea. Bott. 

 temp.? 1766 fms. Bott.? 



Six specimens (several fragmentary). 



