84 PROCEEDINGS OF THE AMERICAN ACADEMY. 
ArtHontA, Ach. 
A GREGARIA, Koerb. Syst. 291 (1855); Willey, Synop. of gen. 
Arthonia, 7. Sphaeria gregaria, Weig. Obs. Bot. 43, t. 2, f. 10 (1772). 
— Duncan Isx.: on twigs, May, 1899, Snodgrass & Heller. Cosmo- 
politan. 
A. NIVEA, Willey, Synop. of gen. Arthonia, 5 (1890). — GALAPAGOS 
Ips. : Hassler Exped. [Mil/]. Endemic. 
A. PLATYSPEILEA, Nyl. Pr. N. Gr. 99 (1868) ; Willey, Synop. of gen. 
Arthonia, 16.—Gatapacos Ips.: Hassler Exped. [ill] acc. to 
Willey, l.c. Garpner Isx.: May, 1899, on twigs with Pyrenula cerind, 
Snodgrass & Heller. Also found in Florida. 
A.sp. Willey, Synop. of gen. Arthonia, 41 (1890). — GALAPAGOS 
Ips.: Hassler Exped. [Hill] acc. to Willey, 1. c. 
Buex.ia, De Not. 
8B. straminea, Tuck. in herb. ALBemarteE Ist.: north of Pt. 
Christopher, 21 Jan. 1899, Snodgrass & Heller. 
This small specimen of a crustaceous Buellia on a volcanic rock is 
identical with a large specimen in herb. Tuckerman, Galapagos Ids., 
Hassler Exped. [Ail/] which is labelled B. straminea, Tuck., which, 
however, appears never to have been described. Why it was never 
published may perhaps be due to the fact that there is another specimen 
in herb. Tuckerman from the Galapagos Ids., Hassler Exped. [ Hill), 
marked B. flavo-areolata, Nyl. and that Tuckerman was in doubt 
whether B. straminea was distinct from that species. There is, how- . 
ever, no note of Tuckerman stating his opinion. The Snodgrass & 
Heller lichen agrees perfectly with the specimen of B. straminea. Tn 
both the asci are obovate, 32-42 p by 14-17 »; spores fuscous, 2-celled, 
11 » by 8-9»; paraphyses hyaline, 2 » in diam., branching only at the 
apex where they end in globose tips, 5 p in diam., the upper half of 
which is dark colored. Todine turns the hymenium blue. The specimen 
of B. flavo-areolata in herb. Tuckerman differs only in having spores 
rather larger and narrower, those of B. straminea being nearly globose, 
in which respect it corresponds better with the description of Lecidea 
flavo-areolata, Nyl., Ann. Sci. Nat. Bot. ser. 4, iii. 166 (1899). It 
seems to me probable that the two species are really the same, but in 
the absence of material to show the variations of the spores, it can only 
be said that our lichen is certainly B. straminea which differs from B. 
Jflavo-areolata in the shorter and comparatively broader spores. 
