8 NOTES ON ENTOMOSTRACA, ETC. 



Anterior antennae (fig. 3) six-jointed, short and stout, third 

 joint equal in length to the combined fourth, fifth, and sixth, 

 which are short and nearly equal : the third joint bears two 

 very long and three short setae, the fourth and fifth two long 

 and one short, and the sixth five rather short ones ; the two 

 basal joints, which are much stouter than the rest, bear also a 

 few short setae : posterior antennae (fig. 4) five-jointed, terminal 

 joint armed with a few short claw-like setae, third joint with 

 two rather larger, curved setae. First pair of maxillae of the 

 usual four-lobed type ; second pair (fig. 5) small, palp indis- 

 tinctly three-jointed and bearing a long terminal claw. First 

 and second pairs of feet nearly alike, five-jointed, first pair 

 with two rather stout terminal claws (fig. 6), second with two 

 apical setae, the smaller of which bears a few secund barbules 

 on the distal half of its posterior margin (fig. 7) ; the last joint 

 of both limbs extremely small. Post abdominal rami (fig. 8) 

 very small, bearing two small apical setae and three rather 

 larger lateral ones. 



Hab. — One specimen only (a female) taken in depth of 59 

 fathoms, 29 miles east of Alnmouth. 



As compared with Argilloecia cylindrica, the only recognised 

 British species, the shell of A. affinis is somewhat larger and 

 more evenly rounded in front, while the contour as seen 

 dorsally, instead of being regularly oval with nearly equal 

 pointed extremities, is nearly cuneate, being slightly tapered 

 in front and broad behind. Neither can the species be 

 referred to any of those described by G. W. Miiller in his 

 work on the Mediterranean Ostracoda. Sars describes the 

 anterior antennas as five-jointed, but in this species the thick 

 basal portion is distinctly two-jointed, the more slender apical 

 portion four-jointed. 



