NO. 1573. 



PARA STTTC COPEPODS— WILSON. 417 



egg-strings and not of a male. Furthermore, the deep cracks in the 

 posterior portion of the genital segment on either side in his figure 

 are more likely to be cracks due to the brittleness of preservation 

 than they are to indicate a normal structure. The species has not 

 been noted by other investigators, the only mention of it being in 

 the list ptiblished by Bassett-Smith in 1899. The two specimens 

 mentioned above were evidently covered with fish slime when pre- 

 served, and this has become so incrusted around the appendages 

 as to conceal niau}^ of the details. Enough can be made out, how- 

 ever, to show the identity of Brady's species with that of Dana, 

 which had been described thirty years before, and hence it must 

 stand as a synonym of the latter. Brady's specimens were a little 

 shorter than Dana's, and were lighter in color, the plates on the third 

 segment and the genital segment being without pigment. This would 

 indicate that they were not fully mature, which is further evidenced 

 by the fact that they had no egg-strings. 



PANDARUS SINUATUS Say. 

 Plates XXXII and XXXIII. 



Pnndarus sinnatKi^ Say, 1817, p. 43(5.— Milne Edwards, 1840, p. 471.— Smith, 

 1874, p. 570, pi. VII, fig. 31.— Rathbun, 1886, p. 310, pis. v-vii. 



Female. — Carapace semielliptical to ovate, broader beliind than in 

 front, and a little more than one-third the entire length; width to 

 length as 6 to 5; posterior lobes short, more or less acute, and turned 

 inward at the tips; posterior margin when perfect with a rounded 

 median projection bordered on either side by three or four short and 

 sharp teeth. Usually, however, all the projections are bluntly 

 rounded and irregular, making the margin jagged and sinuate, as in 

 figure 172. Frontal plates narrow and but little prominent, not 

 covering more than half the basal joints of the first antennse. Eyes 

 invisible in the adults, visible in the young, one-third the distance 

 from the anterior margin, and close together on either side of the mid- 

 line. 



Paired dorsal plates of second segment broadly elliptical to oval, 

 one-half longer than wide, diverging at an angle of about .30° 

 from the central axis; their inner margins are sometimes nearly 

 straight or may even be concave; they are widely separated and 

 scarcely touch the second pair, but reach back to the center of the 

 lateral margins of the third pair. The unpaired median plate of this 

 second segment is very wide, comparatively short, with a straight 

 posterior margin without teeth or spines. 



Dorsal plates of the third segment small, nearly circular and sepa- 

 rated by a deep sinus, wdiich is slightly enlarged at its base ; owing to 

 the wide separation of the first plates this second piair are entirely 

 Proc. N. M. vol. xxxiii— 07 27 



