so. 1651. REPORT ON THE OSTRACODA — SUA UPE. 421 



As seen from above, the right shell shows from 8 to 10 small blunt 

 teeth in the region of the hinge (fig. 2). 



Seen from the side, the growing line runs approximately at about 

 the same distance from the shell edge and with pore canals about the 

 entire margin, numerous, and not branching (fig. 1). 



First antenna stout, 5-segmented ; terminal segment slightly more 

 than four times as long as broad; penultimate segment with two 

 spines and two spine-like seta? (fig. 5), which alternate; its terminal 

 spine and seta being about the same length ; the lateral spine being 

 about seven-ninths the length of the terminal one; its lateral seta 

 being slightly longer than its lateral spine. Antepenultimate seg- 

 ment broader than long, with a strong spine. 



Second antenna 4-segmented, flagellum 2-segmented, as usual, and 

 reaching slightly beyond tip of terminal segment. Mandible with 

 strong 4-segmented palp, the penultimate segment of which is broadly 

 widened just beyond the middle (fig. 4), thus forming a sharp angle, 

 at which place is located a group of setse. 



Respiratory plate without any abnormal or mouthwardly directed 

 rays. First pair of legs (fig. 2) strong, basal segment with a seta on 

 each margin, the posterior one unusually thick ; both of them plu- 

 mose and barred, two toothed spines of about the same length at its 

 outer angle. Antepenultimate segment with a strong spine as long 

 as the last two segments; last two segments the same length, and no 

 armature. Terminal spine sickle-shaped, and as long as the last two 

 segments. 



Second and third legs similar (fig. 3), having one spine in place 

 of two at the knee joint and other spines more slender. 



Collected by means of a Birge net from shallow tidal pools near 

 Brighton Beach, New York, June G, 1906 (type locality) ; also near 

 old mill, Jamaica Bay, June 21, 190S, where it was more common. 



Described from five specimens which were obtained only after 

 repeated hauls with the Birge net. They burrowed about in the 

 slime, and could not swim. 



They are distinguished from most other species, especially by the 

 regular character of the shell, which with most species of Cythere is 

 more or less ridged or pitted or tuberculate, as also by its more 

 regular gray color in life. 



Type.— Cat, No. 38347, U.S.N.M. 



25. CYTHERE PAPILLOSA, new species. 



Tlate LXI, figs. 1-A. 



Dimensions. — Length, 0.8 to 0.85 mm.; height, 0.49 to 0.51 mm.; 

 breadth, 0.42 to 0.45 mm. 



Seen from the side (fig. 2), the shell is approximately 1.6 times as 

 long as its greatest height ; highest in the middle j ust back of eyes, 



