TI I A XT Kit. 



MONOGRAPH OF Til 10 LA HOCLIHOX I ACI0.10. 



Ill 



striatums Oil the cells of its receptacle. Its clear amber-color is also peculiar. The occurrence of mon- 

 strous spores in one smaller specimen is noted above, and illustrates the danger of ascribing too much 

 importance even to considerable variations in spore measurements. 



Ceratomyces minisculus Thaxter. 

 This species which always grows on the pale lower margin of the right elytron, has been found on 

 Tropisterrms Striolatua Lec. and T. lateralis Fabr., at Eustis, Florida; on T. limbalis Fee. from Washing- 

 ton; on T. dorsal is Brulle* from California. In the Sharp Collection from Brazil on T. lateralis, Xo. 1184; 

 and in the Museum of Com]). Zool., No. 1337, on an undetermined Tropisternvs from Brazil. It is al- 

 ways readily distinguished by its small size, and almost wholly opaque receptacle. 



COREOMYCES Thaxter. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 56. June, 1902. 

 Mature individual consisting of a single series of superposed cells terminated by a single perithecium. 

 Receptacle attached by a more or less rhizoid-like foot and consisting of three superposed cells, the upper 

 of which becomes divided distally by successive transverse septa; these divisions resulting in a series of 

 superposed cells, from each of which arises, on one side, a single, rarely two, branched antheridial, append- 

 ages; the members of the series thus resulting being superposed in a single vertical row. Perithecium 

 consisting of an undifferentiated stalk-cell immediately above the appendiculate cells, which is followed 

 directly by the ascigerous cavity, the basal and wall-cells being wholly obliterated in mature individuals, 

 except at the tip. 



The development of the individuals in this type is unlike that found elsewhere in the Laboulbeni- 

 ales. The young individual, Plate LXXI, figs. 8 and 17, consists of a series of superposed cells, three in 

 number, from the uppermost of which appendiculate cells are separated distally. The distal portion 

 of the individual above these appendiculate cells, of which there may be one to several, consists of a 

 simple series of from four to six superposed cells, terminated by a simple or branched erect appendage 

 which might be taken for a trichogyne, but is merely a sterile termination. There are thus three regions, 

 a basal, a distal and a middle region, of which the first forms the receptacle proper, the second produces 

 the perithecium, and the middle gives rise to the antheridial appendages; an arrangement quite unlike 

 that seen in any other instance. As the individual continues to develop, the subbasal cell of the distal series, 

 which is finally quite obliterated, becomes proliferous distally, sending branches into the cavity of the cell 

 immediately above it (fig. 9). At about this time the sterile terminal appendage already referred to, is 

 broken or sloughed off. The penetrating branches are apparently primarily two in number, their bases, 

 it would appear, corresponding to the "posterior basal cell" and the "secondary stalk-cell" of the peri- 

 thecia of Laboulbcnia and other genera, as described in my Monograph, pp. 219 and 232, Plate II, figs. 

 16-18, cells (o) and (h), which in these cases arise as branches from the stalk-cell (p). The further devel- 

 opment appears also to correspond with that of the ordinary type of perthecium, in that these two cells 

 give rise to a series of branches from which wall-cells, parietal cells, and procarp cells are formed. 



Of the two original cells one, Fig. 12, (o), as in other cases, appears to form only one series of wall- 

 cells and one of parietal cells; in other words it appears to branch only once, while all the rest of the 

 essential cells of the perithecium and procarp are derived from three branches which arise from the second 

 cell (h). As these branches develop, they penetrate and destroy the successive septa which separate 

 the cells above, of which there may be from two to four; and finally the procarpic branch, reaching the 

 tip of the terminal cell before the others, perforates it at a point corresponding to the base of the terminal 

 sterile appendage above mentioned, and emerging forms the short irregularly branched trichogyne shown 

 in figs. 11-12. I have found it impracticable to draw the exact conditions seen by focussing upon this 

 plexus of penetrating branches and the figures given (figs. 11-12) represent only the structures seen in 

 a single plane. In fig. 12 for example the branches are represented in a position a little below the median 



