366 PROCEEDINGS OF THE NATIONAL. MUSEUM vol.83 



First segment large, lateral carinae produced forward and ex- 

 panded inward, almost joined along longitudinal axis of body above 

 head, sinus between carinae long and narrow; surface of segment 

 with a few small indistinct tubercles on posterior portion. 



Other segments with two transverse rows of rather large, low, 

 rounded tubercles; anterior row crossing dorsum and median por- 

 tion of lateral carinae almost to lateral margin and containing 14 

 to 22 tubercles; posterior row containing but 6 to 12 tubercles and 

 these not extending onto lateral carinae; a transverse furrow is 

 strongly evident on dorsum between the two rows of tubercles but 

 does not extend onto the carinae. 



Anal valves together are hemispherical, the inner margins not 

 meeting in a reentrant angle as in the other three species. 



The alcoholic specimens are creamy white; the living colors are 

 not recorded. 



BRACHYCYBE LECGNTEI Wood 



Brachycyhe lecontii Wood, Proc. Acad. Nat. Sci. Philadelphia, 1864, p. 187. 



In order to place this species on the same taxonomic footing as 

 the other members of the genus, the following brief description has 

 been prepared: 



Description. — Length of largest specimen 13 mm, width 3 mm. 

 Number of segments in the two specimens examined 40 and 42 

 (Wood reported 47 seg-ments) ; anterior end of body suddenly broad- 

 ened from in front (fig. 32, e). 



Head not covered by first segment. 



First segment with lateral carinae short but extending obliquely 

 forward a considerable distance, the head visible between them. 

 Anterior median margin transverse. Surface with small but very 

 evident tubercles in three irregular transverse rows. 



Other segments with two transverse rows of small hemispherical 

 tubercles extending across dorsum and onto lateral carinae, the 

 anterior row with 20 to 32 tubercles and the posterior row with 

 a somewhat smaller number. The transverse furrow between the 

 rows of tubercles is strongly impressed on dorsum and extends across 

 each lateral carina to margin, just behind repugnatorial pore; the 

 furrow is broader and less conspicuous on the carinae. 



Anal valves strongly inflated, meeting at a reentrant angle. 



Remarhs. — The two females from which these notes were derived 

 were collected at Tallulah, Ga., in 1887, and probably are those re- 

 ported by Bollman.^ Wood's specimens came from Georgia, and 

 his figures of them leave no doubt as to the identity of the Tallulah 

 specimens. The recognition of B. petasata from Tennessee places 



»U. S. Nat. Mns. Bisll. 46, p. 189, 1893. 



