834 



PBOCEEDINGS OF THE NATIONAL MUSEUM. 



23. DYNAMENE BENEDICTI, new species. 



Body oblong, oval; surface minutely granular; color, dark gray. 



Head with small median point. Eyes situated post-laterally. First 



pair of antennje extend to the middle of the first thoracic segment; 



first joint of peduncle longest; second and third joints about equal 



in length; flagellum contains six joints. Second pair of antenuiie 



extend to the posterior margin of the second thoracic 



segment; flagellum contains about eleven joints. 



The thoracic segments are of equal length. The 

 epimera are square with rounded posterior angles. 



The penultimate abdominal segment is crossed by 

 suture lines, indicative of coalesced segments. The 

 terminal segment is triangular, terminating posteri- 

 orly in two teeth separated by a narrow, rounded, 

 funnel-shaped sinus. This segment is very convex, 

 and bears two longitudinal ridges on either side of 

 the median line. The uropoda do not exceed in length 

 the extremity of the terminal segment. Both branches are rounded 

 posteriorly and are similar in shape and size. 



The type was collected by Mr. Heath at Monterey Bay, California, at 

 the surface. No. 22570, U.S.KM. 



Fig. 10. — DYNAMEiNE 

 , benedicti. x 13j. 

 Last thoracic seg- 

 ment AND ABDOMEN. 



24. DYNAMENE GLABRA, new species. 



Bodj^ oval; surface smooth. 



Head small; eyes situated post-laterally. First pair of antennae 

 extend to the eye; first joint oblong; second joint short, half as loug 

 as first; flagellum contains six articles. Second pair of antennae extend 

 to the posterior margin of the first thoracic segment; 

 flagellum contains about ten articles. 



Thoracic segments are snbequal; the first is a little 

 longer than any of the others. 



The penultimate abdominal segment consists of sev- 

 eral coalesced segments, as indicated by the suture 

 lines. The terminal segment is triangular, with a small 

 median excavation at its extremity. The lower part of 

 this segment is quite flat, the slope being gradual from 

 the convex upper part or base of segment to the ex- 

 tremity. The inner branch of the uropoda is large and 

 rounded i)osteriorly ; the outer branch is small, though similar in shape, 

 and is much shorter than the inner branch. 



A number of specimens were collected by Mr. Heath at Monterey 

 Bay, California at the surface. 



Type.— So. 22571, U.S.I^.M. 



Fig. 11.— DYNAMENE 

 GLABRA. X 13§. 



Abdomen and last 

 TWO thoracic seg- 

 ments. 



