45 



Diaptomus albuquerqtiensis rv. s^. 

 (Figures 16—26.) 

 Species of moderate size. The céphalothorax is widest near the 

 middle. The last two segments are fused and the last projects laterally 

 where it is armed with two strong spines ; there is also a dorsal pro- 

 tuberance from the last segment. The first abdominal segment is 



Fig. 16. Fig. 17. Fig. 18. Fig. 20. 



longer than the remainder and projects laterally into two strong spi- 

 nes; second segment very short, invaginately concealed in the preced- 

 ing. Caudal stylets short but nearly as long as the preceding segment, 



