-ABT.18 NEW GEISTBEA OF MILLEPEDS — COOK AND LOOMIS 25 



First segment considerably wider than the head; lateral carinae 

 bent forward on either side with the dorsum produced slightly for- 

 ward into a truncated lobe between the carinae, with six to eight 

 tubercles in an irregular transverse row on either side of the middle, 

 the outermost tubercles extending onto the lateral carinae; behind 

 the lobe are two transverse rows of tubercles as on the segments 

 following. 



Segments, except a few at the ends of the body which have the 

 number of tubercles reduced, with from 25 to 35 tubercles in the 

 anterior row and from 18 to 30 in the posterior row which does not 

 extend as near to the lateral margins as the anterior row. 



Repugnatorial pores laterally placed on the edges of the carinae, 

 near the middle of the carinae on a few of the anterior segments but 

 almost at the posterior angle of the middle and posterior segments. 



Last segment not exceeding the posterior corners of the penulti- 

 mate segment; dorsal surface not tuberculate but with several small 

 seta-tipped tubercles projecting from the hind margin on either side 

 of the middle. 



Anal valves projecting beyond the hind margin of the last segment. 



Numerous fragments and several entire but dead specimens were 

 collected by H. S. Barber from beneath bark of an old fir log at the 

 Sunnyside mine, near Seneca, Plumas County, Calif., December 

 19, 1922. 



ADDENDA 

 Genus GOSODESMUS Chamberlin 



This genus was overlooked until the paper was in proof, but is 

 readily distinguished from Brachycyhe by the presence of two trans- 

 verse rows of large oval cariniform tubercles forming longitudinal 

 ridges on the dorsal surface of the segments. 



The body is described as more slender than in Braohycyhe^ with 

 the pores not stipitate, the lateral carinae horizontal, broadly rounded 

 in front, with narrow thickened margins, straight or slightly sinuate 

 near the middle, bearing minute pores near the rounded posterior 

 corners, the corners somewhat produced on posterior segments, on 

 the penultimate segment nearly attaining the broad apex of the last 

 segment; dorsal tubercles rather widely spaced, the anterior row 

 usually of 10 tubercles the posterior row six to eight, the first seg- 

 ment narrower and scarcely longer than the second, the tubercles 

 rather short and irregular, six in each row. A transverse groove be- 

 tween the rows of tubercles is indicated on the drawing, as well as a 

 median suture. Antennae slightly clavate, joint six much the largest, 

 nearly twice as long as joint five ; joint seven distinct, about half as 

 long as joint five. The legs and sterna not described. 



