OF ARTS AND SCIENCES. 11 



above the supra-basal cell. Receptacle composed of seven main cells ; 

 the basal nearly triangular, the supra-basal elongate, cylindrical, often 

 three times as long as the basal. Above the supra-basal cell the re- 

 ceptacle is divided by a longitudinal partition into two cells, that on 

 the inner side smaller, and separated from the base of the perithecium 

 by a single, usually squarish cell, above which are two small triangular 

 cells, an outer and an inner, sometimes connected, which form the base 

 of the perithecium. The two remaining cells of the receptacle bear 

 the disk-like base of the pseudoparaphyses, and consist of an outer 

 larger one, separated by an oblique partition, on its upper inner side, 

 from the smaller inner one. Spores fusiform, hyaline, granular, in- 

 volved in mucus, septate near one extremity, 75-80 /a X 6.5-8 /x. 

 Perithecia 135-170 /x X G5-70 /x. Pseudoparaphyses 200-725 /x. 

 Length to tip of perithecium 450-GOO fj. ; average 538 /x. Maximum 

 total length to tip of pseudoparaphyses 950 /x. 



On Platynus cincticollis. Connecticut. 



This species, which is the largest known representative of the ge- 

 nus, being easily visible to the naked eye, is allied to L. Nebrice and 

 L. Jiagellata, resembling the latter in appearance, but easily separable 

 from it by its great size and the details of its structure. Its trycho- 

 gyne is remarkable for its unusual development, being often several 

 times branched, and otherwise peculiar from the spiral twisting of one 

 or more of its ultimate branches. 



Laboulbenia brachiata nov. sp. 



Color brown to blackish. Perithecia long-ovoid, darker towards 

 the hyaline apex. Pseudoparaphyses blackish, or nearly hyaline ; 

 each on a small black basal disk ; arising from an oblique cellular 

 base ; ten in number in a double row of five pairs ; septate, the 

 basal and sub-basal joints often inflated, especially in the outer larger 

 pairs ; dichotomously once to twice branched above the basal and 

 sub-basal joints, the ultimate branches often very long and attenu- 

 ated. Receptacle consisting of single basal and supra-basal cells, the 

 latter slightly the longest, above which are two cells, that on the 

 inner side the largest : above and between these two cells is a third 

 smaller, central one, and on the inner side of this another, slightly 

 larger cell, is separated from the perithecium by two small flat cells 

 which form its base and are sometimes confluent. The remaining 

 cells of the receptacle form the base from which the pseudoparaphyses 

 arise, which is made up of five obliquely superposed cells, decreasing 

 in size from below upwards, and separated from the pseudoparaphyses 



