REPORT ON THE COPEPODA. 127 



6. Saphirina optica, Lubbock (PI. XLIX. figs. 14-17). 



Saphirina opaca, Lubbock, Trans. Entom. Soc, vol. iv. pi. v. figs. 9-11. 



Female. — Length, l-8th of an inch (3*1 mm.). Body elongated, about thrice as long 

 as broad ; abdomen half as long as cephalothorax, five-jointed, first segment narrow and 

 rounded; second, third, and fourth lunate, fifth truncate, all of about equal length; 

 caudal lamelke ovate or subquadrangular, about twice as long as broad, equal in length 

 to the last three abdominal segments, inner apical angle produced and acute; cephahi- 

 thorax six-jointed; first joint short, next four about equal in size, and having rounded 

 margins, sixth very small and rounded. Anterior antennas (fig. 14) five-jointed, bearing 

 numerous setae, which are much shorter than the limb itself; first joint very long, equal 

 to the other three; fingers of the posterior (fig. 15) antenna shorter than the second 

 joint; claw short. Marginal spines of the swimming feet (fig. 16) very short and wide ; 

 branches of the fourth pair equal. Eyes contiguous. 



Habitat.— South Atlantic, in lat, 41° 54' S., long. 54° 48' W. 



Only a few examples of this species were seen, all females, and though they differ 

 somewhat, especially as to the numbers of thoracic and abdominal segments, from Sir 

 John Lubbock's specimen, they are in other respects so closely similar that 1 can scarcely 

 doubt their identity with that form. The caudal lamellae w T ere seen as above described 

 only in the largest of four specimens. In the rest the conspicuous apical tooth was 

 absent, but its outline was indicated within the true margin, so that I suppose it would 

 have been fully developed after the next moult. The limbs, both antenna? and swimming 

 feet, are all extremely small, very much shorter than in any other species known to me. 



7. Sajjhirina splendens, Dana (PI. XLIX. figs 11-13). 



Saphirina splendens, Dana, Crust. U. S. Expl. Exped. (1852), p. 1246, pi. lxxxvii. fig. 9. 



I have noticed three specimens which, from the shape of the caudal lamellae, seem to 

 belong to this species; but as the abdomen of the female is only three-jointed (fig. 11), I 

 suppose that they are probably immature animals. The gatherings in which they occurred 

 were got off Port Jackson, and at Station 299, lat, 33° 31' S., long. 74° 43' W.; depth, 

 20 fathoms. 



The specimens, being mounted for the microscope, were not dissected. 



8. Saphirina gemma, Dana (PI. XLV1II. figs. 6-8, and PL L. fig. 18). 



Saphirina gemma, Dana, Crust. IT. S. Expl. Exped. (1852), p. 1252, pL lx.wviii. tigs. 1, 2. 



Female. — Length, l-8th of an inch (3'1 mm.). A large species, much narrower and 

 more elongated than any of the preceding; nearly four times as long as broad, with the 

 thorax not much wider than the abdomen; angles of the thoracic segments a little 



