XEW ISO POD CRUSTACEANS—RICFIARDSON. 



17 



Locality. — Coast of Georgia. 



Depth.— ^^'^) fathoms. 



Collection of the U. S. National Museum. 



The head has a median projection on the anterior marj^nn, produced 

 forward in the form of a large tubercle. The e^'e.s arc colorless. The 

 first pair of antenna? reach the posterior margin of the head; the 

 flagellum is composed of eight articles. The second pair of antennae 



Fig. 20.— Dynameniscus CARiNATUs. a, Head. . 6. Abdomex. c, Lateral view, d, Second pleopod 



(RIGHT SIDE). X 27. C, THIRD PLEOPOD OF RIGHT SIDE. (ONE BRA^■CH.) ,< 52. /, THIRD PLEOPOD 

 OF RIGHT SIDE. (OTHER BRANCH.) X 52. g, FOURTH PLEOPOD OF RIGHT SIDE. INNER BRANCH. 



X 39. /(, Fourth pleopod of right side. Outer branch, x 39. 



reaches the posterior margin of the iirst thoracic segment. The seg- 

 ments of the thorax are roughh" granulated. A transverse median 

 ridge or elevation appears on each one of the segments, giving the 

 dorsum, from a lateral view, a very rugged appearance. The epimera 

 are rough and are drawn out laterally in very acute angles. 



The abdomen is composed of two segments, the first segment being- 

 formed of several coalesced segments, as indicated by two suture 

 lines. In the center of this segment are two longitudinal ridges, 

 placed obliquely, so as almost to meet anteriorly and to diverge at the 

 Proc. N. M. vol. xxxi— 06 2 



