NO. 2286. THE NEW COPEPOD FAMILY SPHYRIIDAE— WILSON. 597 



development have separated the appendages and carried them farther 

 away from the midline. 



The month tube and maxillae are similar to tho.se of ferox, but the 

 rami of the maxillae are much smaller and each is tipped with a 

 tiny spine. The second maxillae arc large and stout and are tipped 

 with a sort of chela formed of two rounded knobs. 



The neck is wrinkled for its entire length and is the same diam- 

 eter throughout, which is relatively nearly twice that of ferox. And 

 like the latter it shows the segmentation by breaks in the longitudinal 

 muscles and by grooves on the lateral margins. The trunk is obcor- 

 date, the neck joining its apex, and is flattened dorsoventrally, the 

 thickness being less than a third of the width. It is as wide as long, 

 but is made up of the same parts as in ferox^ where the length was 

 several times the width. Its surface is perfectly smooth, the dorso- 

 ventral muscles separating the coils of the oviducts being apparently 

 too weak to produce any pits. The posterior processes are sausage 

 shaped, slightly widened along the center, where they become a 

 third of the width of the trunk. They are a fourth longer than 

 the trunk, but are only a trifle more than half the length of the egg 

 strings. The latter are the same diameter as the processes and are 

 bluntly rounded at the tips. The eggs are arranged in 9 or 10 

 rows, with 20 to 25 eggs in each row. 



The minute abdomen is set into the sinus of the posterior margin 

 of the trunk and can be recognized only by the break in the longi- 

 tudinal musculature and by the large anal laminae. 



Internally the cement glands occupy the posterior corners of the 

 trunk; they are short, somewhat curved, and about three times as 

 long as wide. In one of the females the cement glands showed a 

 fairly regular segmentation, but in all the others there were no 

 indications of it. The ovaries and oviducts are arranged as in ferox^ 

 the convolutions of the oviducts when the eggs are fully ripe extend- 

 ing into the fourth segment. Chitinogen tissue fills the entire cavity 

 of the posterior processes, but is not as abundant in the trunk and 

 neck. 



Color, lobes of the head a deep crimson, especially the posterior 

 ones, the red set off with black around the tips of the lobes. Bases 

 of the lobes, the central portion of the head, and the anterior neck 

 a pale yellow; remainder of neck a bright red, deepening toward 

 the trunk, close to which it becomes almost black. Trunk varying 

 in different specimens, largely due to the difference in the develop- 

 ment of the eggs, sometimes dull yellow, yellowish white, pink, or 

 even a bright orange. Posterior processes a light gray or grayish 

 white; egg strings creamy white, changing to lavender with devel- 

 opment. 



