10 THAXTER. 



symmetrically prominent. Spores about 40 X 3.5 /x- Peritheeimn 

 75-85 X 27 At, its appendage about 45 X 11 m- Total length to tip 

 of peritheeium 125-145 X 40-45 fx. 



On the posterior legs of Laccophilus sp., Sangre Grande, Trinidad, 

 B. W. I., No. 2684; and Grand Etang, Grenada, Xo. 2687. 



A peculiar species resembling C. spinosus and C. Italicus in having a 

 well developed appendage arising from cell g. 



Chitonomyces helicoferus nov. sp. 



General color clear pale straw-yellow; the axis nearly straight. 

 Basal cell hardly twice as long as broad, tapering slightly to the rela- 

 tively small foot; cell h about as long as cell a, its anterior margin 

 slightly concave; cells c. d and e relatively long, subequal, the base of 

 cell d occupying the whole distal margin of cell h; cell c usually promi- 

 nently convex above cell h; cell / rather long and narrow, its base 

 somewhat oblique; cells g and h subequal, the former dark amber- 

 brown distally; cell i prolonged far beyond the insertion of the ap- 

 pendage, which becomes lateral in position on the inner side, where 

 the base of the proliferation forms a slight angle; the cell-insertion 

 blackish; the cell proper hyaline; the proliferation divergent, taper- 

 ing, blackish olive, its sharp apex recurved in an abrupt helix of one 

 turn. Peritheeium narrower below, its outer margin evenly convex; 

 the flaring tip abruptly distinguished by a dark amber-brown, erect, 

 finger-like projection, appressed and extending to the small hyaline 

 blunt apex, which it partly conceals; the inner subterminal wall-cell 

 subtriangular, projecting on the inner side to form a divergent, 

 bluntly subconical process; the lower margin of which lies close beside 

 cell i, and part of its proliferation. Spores about 25 X 2 /x. Peri- 

 thecia 54-60 X 12.6 m; anterior projection 14 X 5 /x, the posterior 18 m> 

 by 18 ^x at l^ase. Total length to tip of peritheeium 100 X 19 ix. 



On the margin of the left elytron near the middle, of Laccophilus sp. ; 

 No. 2680, Sangre Grande, Trinidad, B. W. I. 



A very characteristic species, most nearly related to C. melanurus, 

 from wliich it is most readily distinguished by the modification of cell i, 

 the proliferation of which is quite different in shape and color, while 

 the cell itself is hyaline instead of opaque. A dozen well developed 

 and perfect specimens have been examined. 



