SIRIELLA GRACILIS. 193 
° 22.4’S., long. 107° 45’ W. 300 fms. to surface. 2 specimens. 
Sta. 4695. Dec. 23,1904. Lat. 25 9 
Sta. 4696. Dec. 23,1904. Lat. 24° 40.3’S., long. 107° 5.3’ W. Surface. 7 specimens. 
Sta. 4698. Dec. 24,1904. Lat. 22° 50.4’ S., long. 105° 31.7’ W. Surface. 1 specimen. 
Sta. 4700. Dec. 25,1904. Lat. 20° 28.8’S., long. 103° 26.3’ W. Surface. 5 specimens. 
Sta. 4702. Dec. 26,1904. Lat. 18° 39.5’S., long. 102° W. Surface. 1 specimen. 
Sta. 4704. Dec. 27,1904. Lat. 16° 55.3’S., long. 100° 24.6’ W. Surface. 1 specimen. 
Sta. 4706. Dec. 28, 1904. Lat. 14° 18.7'S., long. 98° 45.8’ W. Surface. 1 specimen. 
Sta. 4709. Dec. 30,1904. Lat. 10° 15.2’S., long. 95° 40.8’ W. 300 fms. to surface. 1 specimen. 
Sta. 4710. Dec. 30,1904. Lat. 9° 30.5’S., long. 95° 8.3’ W. Surface. 1 specimen. 
Sta. 4712. Dec.31,1904. Lat. 7° 5’S., long. 93° 35.5’ W. Surface. 11 specimens. 
Sta. 4718. Jan. 13,1905. Lat. 5° 32.4’S., long. 90° 32.2’ W. Surface. 1 specimen. 
Sta. 4720. Jan. 14,1905. Lat. 7° 13.3’S., long. 102° 31.5’ W. Surface. 1 specimen. 
Sta. 4723. Jan. 16,1905. Lat. 10° 14.3’S., long. 107° 45.5’ W. Surface. 14 specimens. 
Sta. 4725. Jan.17,1905. Lat. 11° 38.3’S., long. 110° 5’ W. Surface. 7 specimens. 
Sta. 4727. Jan.18,1905. Lat. 13° 03’S., long. 112° 44.9’ W. Surface. 12 specimens. 
Sta. 4729. Jan. 19,1905. Lat. 14° 15’S., long. 115° 13’ W. Surface. 6 specimens. 
Sta. 4741. Feb.11,1905. Lat. 8° 29.7’S., long. 122° 56’ W. Surface. 1 specimen. 
Remarks.— Adult specimens of both sexes vary extremely in length. The 
smallest female with marsupium (from Sta. 4702) is 4.4 mm. long, another 
female (from Sta. 4696) scarcely 4.5 mm., while the largest female (from Sta. 
4680) is 9.6 mm. from the end of the frontal plate to the tip of the telson. One 
of the smallest males (from Sta. 4678) is 6.6 mm., and the largest male (from 
Sta. 4677) is 9.8 mm. The number of spines on the distal part of the outer 
margin of first joint of the exopod of the uropods varies from 3 to 6. 
Three females from Sta. 4727, two from Sta. 4680, and one female from 
Sta. 4611 and from Sta. 4671, have an Epicarid, probably Dajus siriellae G. O. 
Sars, in the marsupium. 
Distribution.— According to the literature and the collections seen by me 
this species is widely distributed in the tropical and warmer temperate areas of 
the Atlantic, the Indian Ocean, and the Pacific; the Copenhagen Museum 
possesses specimens from about fifty places in these Oceans. In the Atlantic 
it has been taken northwards to Lat. 42° N., long. 44° W., southwards to Lat. 
40° 32’ S., long. 52° 2’ W., in the Indian Ocean southwards to Lat. 40° 4’ S., 
long. 53° 25’ E. (specimens from these three localities in. the Copenhagen Mu- 
seum); in the Pacific it was taken at Lat. 33° 40’ N. in 1904, and southwards 
it is known from a point between Sidney and Wellington (G. O. Sars). It 
has generally been captured at the surface; I am even inclined to think that 
the specimens from the three Stations named above from ‘*300 fms. to surface”’ 
were taken near the surface. 
11. Siriella gracilis Dana. 
1852. Siriella gracilis Dana, U.S. Expl. Exp. Crust., 1, p. 658, pl. 44, figs. la-Ig. 
1885. Siriella gracilis G. O. Sars, Challenger Rept., 18, p. 209, pl. 36, figs. 25-28, 
1910. Siriella gracilis H. J. HANSEN, Siboga-Exp., 37, p. 31. 
