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PEOCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 72 



Segments flat underneath, moderately convex above, with a dis- 

 tinct transverse groove separating the subsegments; anterior sub- 

 segment smooth and even, more exposed than in Polyzonium; pos- 

 terior subsegment somewhat inflated behind the groove, the surface 

 minutely wrinkled, punctate or striate, especially in the groove, Re- 

 pugnatorial pores on slight prominences in front of the middle of the 

 posterior subsegment and rather remote from the margins on an- 

 terior segments, closer to the margin on posterior segments; pore of 

 segment 5 much closer to the lateral margin than on the other seg- 

 ments, located on the anterior subsegment, with the transverse suture 

 of the segment sinuate behind the pore, forming a small lateral 

 elevation around the pore. 



Penultimate segment slightly longer than the preceding, with a 

 wide posterior sinus exposing the last segment. 



Last segment small, with a broadly rounded apex concealing the 

 anal valves. 



Basal joints of the legs nearly in contact at middle, while in Poly- 

 BomuTTh they are distinctly separated, especially on the anterior 

 segments. 



BDELLOZONIUM CERVICULATUM, new species 



Number of segments 39 to 46. The largest specimen 16 mm. long 

 by 3.3 mm. broad. Body rather strongly convex above, the posterior 

 end more abruptly rounded than the anterior; body cavity about 

 twice as wide as high. 



Fig. 3. — Bdhllozonium ceeticulatum. a. Lateral margins and kepugna- 



TORIAL PORES OP SEGMENTS 4, 5, AND 6. &. LAST THREE SEGMENTS OF 

 BODY, DORSAL VIEW 



Color of the dorsum salmon pink in living specimens, more 

 brownish in alcohol, the side of the segments and the ventral surface 

 pale ; head and antennae light, mottled with purplish. 



Antennae about one and a half times as long as the first segment 

 is wide and reaching well beyond the sides of the body; joints 3 and 

 6 distinctly longer than the others. Ocelli 3 to 4 on each side in a 



