438 



THAXTER. — MONOGRAPH OF THE LABOULBENIACE^E. 



This fine and very distinct species has been seen on two specimens, only, of its host, taken in Lake 

 Eustis. It is distinguished by the great size of its perithecium, and especially of its primary appendage, 

 the branches of which are more numerous than those of any other species. It sigmoid curvature and 

 pale color serve further to distinguish it. 



Ceratomyces Braziliensis Thaxter. Plate LXX, fig. 2. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVII, p. 44. June, 1901. 



Dark amber-brown. Perithecium somewhat inflated just above the constricted base, the upper 

 two-thirds broad and of about the same diameter throughout; about forty-five wall-cells in each row, the 

 tip small, short, rather narrow, abruptly hunched externally, the hyaline lips turned abruptly toward 

 the base of the perithecial appendage, which consists of a basal cell hardly differentiated from the wall- 

 cell below it, though somewhat longer, the portion above it erect, slender, stiff, slightly curved outward, 

 tapering but little, the subbasal cell bearing a characteristic basal enlargement which projects toward 

 the lip-cells and lies just above them. The appendage and receptacle much as in C. mirabilis. Perithe- 

 cium 650 X 95 p (basal) X 87 p (distal). Appendage 185 or more. Total length to tip of perithe- 

 cium 800 p. 



On inferior thorax of Tropisternus nitens Cast. var. Rio de Janeiro. Sharp Collection, No. 1181. 



This is decidedly the largest species of the genus, with the possible exception of C. curvatus, and is 

 readily distinguished by the conformation of its tip, which resembles that of C. Mcxicanus, and by the 

 blunt projection from the base of the perithecial appendage just opposite the apex of the perithecium. 



Ceratomyces Californicus Thaxter. Plate LXVIII, figs. 6-7. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 448. April, 1900. 



Amber-brown. Receptacle relatively slender, consisting of three small superposed cells surmounted 

 by two similar cells which form the base of the appendage and perithecium; the foot small, normal. Peri- 

 thecium short and stout, from two to three times as broad distally as at the base; about twenty cells in 

 each of the inner rows of wall-cells, the inner margin convex, distally abruptly bent inward to the short 

 beak-like apex, so that the inner margin of the tip is thus horizontal, or even oblique, above the apex; 

 about the eighteenth cell of one of the outer rows forming the base of the usually straight rather remotely 

 septate perithecial appendage, which commonly diverges at an angle of forty-five degrees or even at right 

 angles. Appendage small and slender (the extremities broken in the types) becoming lateral in position. 

 Perithecia 185-200 X (base) 30-40, (distal portion) 70-85 p. Receptacle 50-70 X 25 p. Total length 

 to tip of perithecium 250-300 p. 



On the left anterior inferior angle of the prothorax of Tropisternus dorsalis Brulle, California, and in 

 the same position on T. glaber Herbst., from Cape Neddock, Maine (Bullard). 



The single specimen of this species found by Mr. Bullard does not differ from the Californian mate- 

 rial, and the species may prove to be not uncommon in the East, if looked for in the position indicated. 

 It is closely allied to C. camptosporus, but differs in its considerably smaller size, in the character and 

 suffusion of its foot and receptacle, in the antheridial appendage w hich lacks the characteristically enlarged 

 subbasal cell and also in other minor points. 



Ceratomyces camptosporus Thaxter. 

 Further material of this rare species has been obtained from various localities in New England, and 

 also on Tropisternus limbalis Lee, from Washington; T. striolatus Lec. from Texas, and T. lateralis 

 Fabr. from Eustis, Florida. It is a well marked and constant form, closely allied to C. Californicus, but 

 readily distinguished by its foot and appendage, as well as by its greater size. 



