no. 2065. THE CRUSTACEA EVPHAU SI ACE A—HAN SEN. 107 



have been dealt with in my above-quoted paper. Large females 

 are 24-25 mm. long, males 18 mm. 



Distribution. — The long list shows this species to be extremely 

 common in the Atlantic off the United States between lat. 40° N. 

 and 39J° N., that it has been taken once at about lat. 42f ° N., several 

 times between lat. 39£° and 37i° N., and once at lat. 36^° N. In 

 the Ingolf Malacostraca, vol. 1 (1908) I have dealt with the distri- 

 bution of N. megalops. It has been taken as far north as South- 

 west Iceland, in lat. 63° N., also east of Newfoundland, west of the 

 Faroes and farther south in the eastern north Atlantic; it is un- 

 known from the tropical and subtropical belts of the Atlantic, but 

 found again at some places in the southern temperate Atlantic. 

 I mentioned that the Copenhagen Museum possesses specimens from 

 the southern part of the Indian Ocean, viz, at lat. 40° 8' S., long. 

 52° E.; at lat. 38° S., long. 62i° E.; and at lat. 40° 41' S., long. 85° 

 22' E., but as all specimens in question are females I am now unable 

 to decide whether the specimens belong to N. megalops G. O. Sars or 

 to the extremely similar N. difficilis H. J. Hansen, a species unknown 

 to me in 1908. 



36. NEMATOSCELIS DIFFICILIS H. J. Hansen (1911). 



1911. Nematoscelis difficilis H. J. Hansen, Bull, l'lnst. Ocean. Monaco, No. 210, p. 

 48, fig. 18 B. 



Occurrence. — Among the unnamed material specimens from two 

 stations in the Pacific are at hand : 



Sta. 4757. May 4, 1906. Lat. 39° 18' N.; long. 123° 58' W. 

 Off California. 8 specimens (1 male, 1 female, and 6 half -grown). 



Sta. 4407. April 9, 1904. Off S. E. point of Santa Catalina 

 Island, Gulf of California (about lat. 26° N - .). 1 specimen (male). 



Furthermore, the animals recorded by Ortmann in 1894 as N. 

 megalops belong to this species: 



Sur. 541. January 14, 1892. Lat. 35° 25' 30" N.; long. 125° 09' 

 30" W. 300-0 fathoms. 1 specimen (male). 



Sur. 540. January 14, 1892. Lat. 35° 19' 30" N.; long. 125° 21' 

 30" W. 300-0 fathoms. 3 specimens (male and rudiments of 2 

 females) . 



Finally the specimens from two of the stations referred by Ortmann 

 in 1894 with some doubt to N. microps belong to N. difficilis: 



Off Guaymas, Gulf of California ( about lat. 28° N.), 500-0 fathoms. 

 3 specimens (female). 



Fifty miles south of Guaymas. 700-0 fathoms. 6 specimens ( only 

 1 female adult). 



Remarks. — The material is somewhat scarce and the majority of 

 the specimens either poorly preserved or far from adult. 



Nevertheless, I have had the good fortune to examine 4 adult 

 and rather well-preserved males; I have inspected their copulatory 



