246 ANALES DE LA SOCIEDAD CIENTÍFICA ARGENTINA 



mllm. crass.) caniosulo-lentum foscescens, albo-pubescentem 



efficiens. Sporae non visae. 

 Hab. Ad rimas truncorum putrescentiuní in sylvis prope Paraguari 



Maj. 1883 (sub num. 3898). 

 Obs. Species Ag. campanella Batsch valde affinis, stipite non 



corneo, glabro, etc. recedens; sporis non visis, sectione ergo 



dubia ! 



8. Agarigus (Omphalia?) succineus Speg. (n. sp,)- 



Diag. Perpusillus, totus pulcbre aurantio-succineus, subpelluci- 

 dus(fere tremelloideus, insicco!); pileus primo subglobosus, mar- 

 gine stipite contiguo, subinvohito ac pallescente, dein hemi- 

 spliaerico-explanatus (1,5-2 mllm. diam.), glaberrimus, laevissi- 

 mns, exumbonatus, tenui membrauaceo-subcarnosulus, rigidu- 

 lus (in sicco); lamellae paucae (10-12), distantes, subplicaefor- 

 mes, pileo concolores, dimacriae, utrinqiie acutae, in stipite 

 denticulo decurrentes ; stipes mediocris, gracilis (2-4 mllm. 

 long. — 0,3-0,4 mllm. crass.), teres, deorsum vix incrassatulus, 

 adscendenti-incur.vus, pileo non v. vix obscurior, laevis, glaber, 

 tenuissime fistulosus (?), basi quandoque lenissime subanulato- 

 incrassatulus, albo-puberulus. Sporae non visae. 



Hab. In culmis dejectis putrescentibus bambusaceae spinosae 

 cujusdam, prope Árroyo-guazú in sylva virgínea Caá-guazú, 

 17 Jan. 1882 (sub num. 3377). 



Obs. Species minima, pulcbella, colore et consistentia distinctis- 

 sima! 



9. Agarigus (Pleurotus?) güarapiensis Speg. (n. sp.) 



Diag. Solitarias v. saepius coespitosus; pileus membranaceo- 

 carnosulus, lateralis, borizontalis, applanatus, dimidiatus (4-5 

 cent. diam. — 2-3,5 cent. lat. antr.-post.), postice truncato- 

 subcuneatus v. subrotundatus, non marginatus, fulvo-ferru- 

 gineus V. subtestaceus (in sicco), glaber, laevis, margine 

 tenui, acuto, recto, non v. vix undulato-repandulo; lamellae 

 pileo concolores, subconfertissimae, polymacriae, strictiusculae 

 (1 mllm. lat.), utrinque attenuatae, antice acute postice suba- 

 brupte leniterque sinuatae, non v. vix denticulo brevissimo in 

 stipite decurrentes; stipes lateralis, superue cum pileo conti- 

 nuus inferné a lamellis subdiscretus, modicissime incurvo-ad- 

 scendens, bene evolutus, teres (1-1,5 cent. long. —3-3,5 mllm. 



