Til A XT Kit. 



MONOGRAPH OF THE LA BOULBENIAC1 E. 



On all parts of Lrplockirus unicolor Cast., Javanicns- Cast., L. minuius Cast., Java. 



This anomalous and very peculiar species was at first mistaken for a new generic type, l>nt so far as 

 can be determined From the material, its antheridia are not differenl from those of other members of the 

 genus, and the multiplication of the cells of the secondary axis or fertile branch, and the coincidence of the 

 hitler with the primary receptacle, which is in no way distinguished from it, are points of secondary im- 

 portance. It resembles M. St. Helena 1 more closely than perhaps any other species, the peculiar append- 

 ages being strikingly similar. The long and usually nearly opaque axis is very like that of Rhachomyces. 

 The peculiar staphylinid hosts on which it occurs are sparingly clothed with long stout hairs or seta 1 , among 

 which the parasite is often distinguished with difficulty. Specimens growing on the jaws, or other por- 

 tions of the host where they are exposed to unfavorable conditions, often produce secondary fertile branch- 

 lets, as in fig. 40, but this condition is exceptional; the normal form, as it occurs on the abdomen or in 

 other favorable situations, being similar to that represented in fig. 39, which is the type form. The axis, 

 however, varies considerably in the number of cells which compose it and in the depth of its suffusions. 

 The hosts are tropical insects living under bark. 



EUMONOICOMYCES Thaxter. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVII, p. 21. June. 1901. 



Receptacle consisting of a basal and subbasal cell, the latter producing terminally a sterile appendage 

 and laterally a fertile branch (abnormally more than one) the axis of which is coincident with that of the 

 receptacle, from which it is not distinguished, and consists of a series of superposed cells; the terminal 

 one bearing an antheridium and a stalked perithecium; the rest bearing antheridia or paired sterile ap- 

 pendages from their upper inner angles. The antheridia compound, borne on paired stalk-eells, and 

 consisting of very numerous antheridial cells arranged in subhorizontal, or oblique tiers; the series sepa- 

 rated externally by two superposed sterile cells, and opening into a common cavity from which the 

 antherozoids are discharged by a common outlet between four appendiculate cells which terminate the 

 antheridium and arise from the two primary terminal cells of the antheridium, as in Monoicomyces. 



The only material from which it is possible to form an approximately accurate idea of the structure 

 of the antheridium in this genus is that of E. Papuanus, the hosts of which were preserved in alcohol. 

 Although the form is very small, careful examination with a j'^ oil immersion renders its general cell-arrange- 

 ment sufficiently clear, notwithstanding the fact that from the irregularity of its outline and of the cells 

 composing it, the different appearances that may be obtained from different points of view are very confus- 

 ing. In the lateral view, fig. 15, which is practically the same on both sides, and is the one almost invari- 

 ably seen in preparations where the individuals lie flat, the stalk-cell appears to be, as was stated in the 

 original description, single. It can be determined, however, by careful focussing, or when a view anterior 

 or posterior in relation to the fertile branch is obtained, that the stalk like that of Monoicomyces, is two- 

 celled (fig. 16). Above this stalk the second tier of two cells is also present and from each of these, instead 

 of a pair, as in Monoicomyces, two series of rows of antheridial cells are produced, one on either side. There 

 are thus four such series in paired sets, one anterior and the other posterior, and having much the same 

 appearance in either case, as in fig. 16, which is, however, turned slightly to the left, but shows the straight 

 median line of demarcation wdiich separates the two sets. Were this figure reversed, the opposite side woidd 

 show much the same appearance and if viewed at right angles, either from the right or from the left, the 

 appearance would in either case be similar to that shown in fig. 15. Each of the four sets, as may be seen 

 by reference to fig. 16, in which one of the pairs is represented, consists of about five somewhat oblique 

 rows, which correspond on either side of the straight median line ; each row being composed of about 

 five antheridial cells, the number being apparently subject to some variation, the bases of which are indi- 

 cated in the figure. The method by which these rows of antheridia are separated, is seen more clearly 

 in fig. 17 where only one set is visible, the antheridium in this instance, being younger and viewed more 

 obliquely than in fig. 16, and turned from right to left. Fig. 16 viewed at right angles to its present 



