BOREOMYSIS FRAGILIS. 191] 
Remarks.— This species is allied to B. sibogae H. J. H., but differs especially 
in having the antennal squama conspicuously broader with the end oblique 
and the inner margin more convex; furthermore, the telson is distally much 
narrower and the incision conspicuously shorter than in B. sibogae. 
9. Boreomysis fragilis, sp. nov. 
Plate 1, fig. 3a; Plate 2, fig. la. 
Sta. 4650. Nov. 10, 1904. Lat. 5° 22’S., long. 84° 39’ W. 300 fms. to surface. 3 specimens. 
Sta. 4652. Nov. 11, 1904. Lat. 5° 44.7’S., long. 82’ 39.5’ W. 400 fms. to surface. 1 specimen. 
Sta. 4655. Nov. 12,1904. Lat. 5° 57.5’S., long. 80°50’ W. 400 fms. to surface. 1 adult female. 
Sta. 4671. Nov. 20,1904. Lat. 12° 6.9’S., long. 78° 28.2’ W. 300 fms. to surface. 1 specimen. 
Sta. 4676. Dec. 5, 1004. Lat. 14° 28.9’S., long. 81° 24’ W. 300 fms. to surface. 1 specimen. 
Sta. 4679. Dec. 7, 1904. Lat. 17° 26.4’S., long. 86° 46.5’ W. 300 fms. to surface. 2 adult speci- 
mens, male (Type) and female. 
Description.— Frontal plate considerably produced, subtriangular (fig. 3a), 
with the lateral margins very feebly convex and a little concave in front at the 
rostral process, which is triangular, acute, and bent a little upwards. Eyes very 
small, reddish brown, looking forwards and especially downwards, only a narrow 
strip being visible from above; the eye-stalks increase somewhat in breadth 
from the base outwards and are somewhat longer, measured from the middle 
of the terminal margin, than broad; at the upper inner angle produced into an 
oblong-triangular process reaching considerably beyond the cornea. 
The antennal squama is somewhat less than four times as long as broad, 
broadest somewhat before the middle and there almost twice as broad as at the 
end; the outer margin is feebly concave, the terminal margin oblique, and the 
outer tooth very distinct. 
Exopod of the uropods (fig. 1a) seven times as long as broad, with a couple 
of fine spines on the outer margin at the end of its naked basal fifth. Telson 
proportionately broad, scarcely more than three times as long as broad, but at 
the beginning of its terminal fourth only about two fifths as broad at a little 
from the base; the terminal incision, which occupies about one fifth of the total 
length, has its proximal portion triangular and a little acuminate, while the major 
part of the lateral margins of the incision are more or less distinctly diverging. 
The lateral margins of the telson are furnished with a moderately small number 
of spines; seven or eight at each side are somewhat small but yet considerably 
or much longer than the others which are very or extremely small. 
In the adult male the exopod of third pair of pleopods is about half as 
long again, the exopod of second pair about one third as long again, as the 
endopod. 
