698 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 47. 



Maxillipeds with a stout basal joint and a short and stout terminal 

 claw, curved at the tip, where it carries on the inner margin a long 

 accessory claw, behind which is a row of saw teeth. 



Color, a uniform yellowish-white, the contents of the stomach and 

 intestine dark brownish-black; egg strings orange yellow. 



Cephalothorax, 4 mm. long, 0.50 mm. wide. Trunk 3 mm. long, 

 3 mm. wide at the posterior end. Egg strings 3.5 mm. long, 0.8 mm. 

 wide. 



Specific characters of male. — Body folded on itself in the same way 

 as in spinosa, swollen, mth no distinction of parts or segmentation; 

 a dorsal carapace on the head; genital process larger than in spinosa; 

 no anal laminae. First antennae three-jointed and well armed with 

 setae; second antennae biramose, the exopod two-jointed and tipped 

 with a tuft of setae, the endopod slender, eUipsoidal, and unarmed. 

 Mouth tube long and prominent, projecting its entire length in front 

 of the carapace. 



First maxillae much shorter than in the female and projecting just 

 to the tip of the mouth tube; second maxillae rather slender, the basal 

 joint long and narrow. Maxilhpeds with a stout and thick basal 

 joint and a terminal claw Uke that of the female. 



Color, a uniform yellowish- white. 



Total length, 0.30 mm. Greatest width, 0.20 mm. 



{cordatus, heart-shaped, alluding to the trunk.) 



ReTuar'ks. — ^This species is fairly common on the two kinds of her- 

 ring mentioned. It may be recognized by the heart-shaped trunk 

 with the long and slender cephalothorax attached to its dorsal sur- 

 face. If there is need of any further distinction from spinosa it may 

 be found in the egg strings, which are here attached by one end, are 

 parallel with the trunk axis, or are curved like parentheses marks. 

 In the ripening ovary of this species the thi-ead or filament connected 

 with the oocyte is much longer than in AcJitheres, and contains often 

 as many as 20 cells (fig. 187, pi. 50). 



Genus BRACHIELLA Cuvier. 



Generic cTiaracters of female. — Cephalothorax elongate and cylin- 

 drical, flexed more or less backward, often against the dorsal surface 

 of the trunk; head usually enlarged and covered by a distinct dorsal 

 carapace; trunk swollen, flattened dorso-ventraUy, and in the larger 

 species (10 to 25 mm.) with two rows of pits or grooves or knobs on 

 the doreal and ventral surfaces; two or four paired posterior processes 

 and an unpaged genital process; no abdomen or anal laminae; egg 

 strings long and slender. 



First antennae two to four (usually three) jointed, basal joint 

 more or less swollen; second antennae biramose, the exopod (ventral) 



