140 MUSEO NACIONAL DE BUENOS AIRES. 



loiig. = 2 4: mm diam. ) erectus cum jñleo concreto, snb jjileo 

 minute longitudinaliter squarnilose albostriatus, basi non v. 

 vix incrassatnlus adj^resse parcissimeqne albo-furf'uracens, 

 fistiilosus, fibrosus tenacellus j)ersistens. Sporae elliptico- 

 subnavicnlares utrimque acutiusculae (12-15 ¡x long. = ()-8 

 ;x diam. ) laeves pulchre ferrugineae. Bolbitkis radians Mrg. 

 (Til. Journ. of Cincinnati Soc. vol. XVIII, 1-2, f. 36 j an satis 

 distinctns? 

 12(;. Bolbitius íragilis (L.j Fr. — Sacc, 1. c, f. 1074. 



HaJ). In pratis editioribus jjost phivias, pro])e La Plata, 

 Jan. et Apr. 1888-89. 



Ohs. Solitarius v. subcaespitosus; pileus e conoideo campa- 

 nnlatus (20 -2o mm alt. =20-25 mm. diam. j mox expansus, 

 nmbonatnlns e tenuiter carnosnlo membranacens glaberrimus 

 centro pallescente-rufescens, ambitu lutescente-albescens v. 

 subcinerascens, ad médium usque crebre striatus, margine in- 

 teger; caro tennis alba aquosa ceraceo-mollis; lamellae tenuis- 

 simae membranaceae, lineari-lanceolatae (2-3 mm lat.) con- 

 fertae utrimque attenuatae antice acutae, postice brevissime 

 subadnatae, acie integerrimae, j)Jfimo rufescentes dein rubigi- 

 nosae, postremo fusco -ferrugineae liquescentes ; stipes teres 

 elongatus gracilis (8-10 cm long. = 1,5 mm diam.) a pileo 

 discreto, ex albo pallescente, subsericeo-nitentissimus fistulo- 

 sus, sursum albus non v. vix longitudinaliter striatus, non \. 

 vix albo-pulverulentus, ceterumlaxe irregulariter longiuscu- 

 leque candide araneoso-gossypinulus, basi leniter incrassatn- 

 lus (3 mm diam. ); sporae e globoso ovatae (10-14 y- long. = 

 8-9 [)■ diam.) laeves, pulchre cinnamomeo-fulvae. 

 127. Bolbitius Ameghinoi S^^eg. (n. sp. ) . 



Diag. Solitarius, ex arena erumpeus, pileo cras.so otato- 

 glandiformi candido laeci viscido fiss-o, margine repando, la- 

 mellis tenuissirniü confertissimis latisfulvis, stipite terete elonga- 

 to e fardo caco candido glabro^ laevi. Sporae. . . 



Ilab. In dunis maritimis prope Monte Hermoso, Aug. 1889. 



Ohs. Species pulcherrima habitu Coprino deliquescenti (Bull. ; 

 Fr. sim.illima. Pileus ovatus dein sensim ampliatus et cónico - 

 cam.panulatus (35 -40 mm alt. —30-35 mm diam.), ápice 

 obtusus, margine plicatulus atque saepius irregulariter undu- 

 lato-sinuatus sublobatusque glaber laevis viscosus et granulis 

 arenae arete vestitus, albus; lamellae confertissimae tenuissi- 

 me membranaceae, antice latiusculae (5 mm lat.) obtusae, 



