64 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.48. 



Thor; but this darker color may perhaps be due to the preservation. 

 In most of the males the distal curved part of the terminal process 

 of the male copulatory organs is extremely acute and even a little 

 longer, more slender, and more curved than in the specimen figured 

 in the Siboga work. 



Some of the specimens are uncommonly large. A female from 

 Station 2094 measures 47 mm., a female from Station 2095, 48.5 mm., 

 from the end of the rostrum to the tip of the telson. A male from 

 Station 2094 is 30 mm. long, another, from Station 2427, is 38 mm., 

 and a third male, from Station 2428, is 41 mm. 



Distribution. — According to the statements in my Ingolf Malacos- 

 traca 1 (which also gives the synonymy) this species has a rather 

 restricted distribution; quite recently K. Stephensen has added 

 several stations from West Greenland. In Davis Strait it goes 

 northward to lat. 63° 49' N. West of Iceland it has been taken 

 northward to lat. 65° 20' N. Besides, it has been taken southwest 

 and south of Iceland, southwest of the Faroes, west of the Heb- 

 rides, west and southwest of Ireland, finally west of France south- 

 ward to lat. 46J° N. It has never been caught near the surface; as 

 to more detailed information I refer to the Ingolf paper. In the 

 list of American stations I have in each case added the depth of the 

 sea, though it may be taken for granted that the animals have always 

 been taken by the instruments between the bottom and the surface. 



6. THYSANOPODA ORIENTALIS H. J. Hansen (1910). 



1910. Thysanopoda orientalis H. J. Hansen, Siboga Exp., vol. 37, p. 85, pi. 13, 



figs. 2a-2i. 

 1912. Thysanopoda orientalis H. J. Hansen, Mem. Mus. Comp. Zool., vol. 35, No. 



4, p. 222, pi. 5, figs. 2a-2i. 



Occurrence. — Taken in the west Atlantic at three stations : 



Sta. 994. September 8, 1881. Lat. 39° 40' N.; long. 71° 30' W. 



368 fathoms. 1 specimen (scarcely full-grown female). 



Sta. 2665. May 4, 1886. Lat. 29° 47' N.; long. 80° 05' 45" W 

 263 fathoms. 1 specimen (female). 



Sta. 2382. March 3, 1885. Lat. 28° 19' 45" N.; long. 88° 01' 30" 

 W. 1,255 fathoms. 1 specimen (female). 



Furthermore, the Albatross has taken this species at two stations 

 in the Eastern Chinese Sea, not far from southern Japan: 



Sta. 4908. August 11, 1906. Lat. 31° 40' N. ; long. 129° 20' 40" 

 E. 434 fathoms. 1 specimen (female). 



Sta. 4905. August 11, 1906. Lat. 31° 39' N.; long. 129° 19' E. 



369 fathoms. 1 specimen (male). 



Remarks. — This species is closely allied to T. acutifrons; the dif- 

 ferences have been pointed out in the two papers quoted above. The 

 males of the two species are easily separated by the copulatory 



Vol. 1, pp. 84-85. 



