EUCHAETOMERA TENUIS. 201 
margin, fifth and sixth segments with spiniform denticles along the same mar- 
gins; most of these denticles are rather large though some small ones are inter- 
spersed.— The uropods (fig. 5e) have both rami much slenderer than shown in 
Sars’s fig. 19 (which in this respect differs materially from his fig. 1).— Telson 
(fig. 5e) considerably broader than long, in the adult female with 6-7 spines 
along each lateral margin, while in the immature specimen only 4 and 6 spines 
were observed. 
Length of the adult female 9 mm. ’ 
Remarks.— It will be seen that the additions and corrections to Sars’s 
description and figures are rather numerous. I think that Brutomysis vogtii 
Chun, taken at Madeira, is the young male of the same species. The author 
states that the five anterior abdominal segments have a lateral armature, viz. 
4 spiniform denticles at the postero-lateral angle of each segment, while the 
sixth segment has spines along the whole posterior margin. It is far from im- 
probable that the lateral armature of the anterior abdominal segments is found 
only in the males, and if this supposition be correct, I think that the other 
differences between the specimens studied and Chun’s description and figures 
are due to imperfections in the latter— HF. limbata Illig is possibly another 
species, because its squama, according to Lllig’s figure, has a shape somewhat 
different from that in H. typica and the carapace is, at least in the male, spini- 
ferous around the whole margin. 
Distribution.— Sars enumerated three localities in the Northern Pacific 
between Lat. 35° 22’ and 37° 52’ N., long. 169° 53’ E. and 160° 17’ W.; his speci- 
mens were from the surface of the sea. Ortmann recorded it from off Galera 
Point in the tropical East Pacific and from the Sargasso Sea and the Southern 
equatorial current in the Atlantic. Dr. J. Schmidt captured a single specimen 
West of Gibraltar at Lat. 36° 13’ N., long. 9° 44’ W.— Chun’s Brutomysis vogtia 
was captured at Madeira, and Illig’s 2. limbata at two Stations in the Atlantic. 
20. Euchaetomera tenuis G. O. Sars. 
1883. Buchaetomera tenuis G. O. Sars, Forh. Vid. Selsk. Christiania for 1883, no. 7, p. 42. 
1885. FEuchaetomera tenuis G. O. Sars, Challenger Rept., 13, p. 214, pl. 37, figs. 21-24. 
1905. Euchaetomera fowleri Hour & Tarrersatt, Fisheries Ireland. Sci. Invest., 1902-3, (1905), p. 123 
and 144; pl. 24, figs. 1-3. 
1910. Huchaetomera tenuis H. J. HANSEN, Siboga-Exp., 37, p. 66, pl. 10, fig. 3a. 
Sta. 4717. Jan. 13,1905. Lat. 5° 10’S., long. 98°56’ W. 300fms. tosurface. 1 immature female. 
Sta. 4719. Jan. 14,1905. Lat. 6° 29.8’S., long. 101° 16.8’ W. 300 fms. tosurface. 1 adult female. 
Sta. 4721. Jan. 15,1905. Lat. 8°7.5’S., long. 104° 10.5’ W_ 300 fms. to surface. 1 male. 
Sta. 4722. Jan. 16, 1905. Lat. 9°31’S., long. 106° 30.5’ W. 300 fms. to surface. 1 adult female. 
