OF ARTS AND SCIENCES. 389 



laciniatum, Nyl. Syn. p. 116, an Alabama lichen, which Mr. Wright 

 has detected in Cuba ; but differs in color, in the peculiar habit due to 

 its more simple, elongated, teretish, densely intertangled, substellate, 

 rather than radiant lobes ; also in the slenderer filamentous elements, 

 and the constantly once-septate spores. The spores of C. laciniatum 

 (Alabama, Mr. Peters) are described by Nylander, 1. c, as simple or 

 once-septate, and about thrice longer than wide ; and I have never 

 observed any differing, unless possibly a little in length ; but in the 

 Cuba lichen they become 6-nucleolate and thrice-septate, the length 

 exceeding also more than four times the diameter, — which taken 

 together with the narrower, less uneven lobes, more distinctly chan- 

 nelled beneath, may indicate a variety (var. solenarium). 



Calicium Ravenelii, Tuckerm. in litt. : thallo granuloso glauces- 

 cente ; apotheciis turbinato-globosis margine incurvo radiato-striatulo 

 stipiteque brevi firmulo fusco-nigris. Sporse octonas, fuscescentes, el- 

 lipsoideai) vel fusiformi-ellipsoidefe, simplices, diametro 1^ - 3-plo lon- 

 giores. On old garden palings, St. John's (Berkley), South Carolina, 

 H. W. Ravenel, Esq. Thallus of glaucescent granules (or obsolete). 

 Apothecia smallish, globular, or a little turbinate ; the incurved margin 

 radiately wrinkled or striated, and, as well as the short, rather slender, 

 but firm stipe, brownish-black. Spores fuscescent, from ellipsoid be- 

 coming irregularly somewhat fusiform-ellipsoid, simple, from once and 

 a half to thrice longer than wide. This species, which is well distin- 

 guished by its striated exciple, is dedicated to my valued friend and 

 correspondent, the discoverer. 



Calicium leucochlorum (sp. nov.) : thalli granulis in crustam 

 tenuem subcontiguam ineequalem flavidam hypothallo nigro decussatam 

 confluentibus ; apotheciis clavato-turbinatis subtus ferrugineis disco 

 nigro stipite valido atro. Sporas octonae in thecis cylindraceis, majus- 

 culfe, biscoctiformes, diblastse, medio nunc constrictae, atro-fuscescentes, 

 diam. 1^-2-plo longiores. — On trunks of palm, island of Cuba, Mr. 

 Wright. Granules soon confluent, and forming a thin, uneven, pale- 

 yellow crust, irregularly here and there decussated by distinct, black 

 lines (much as in Lecidea parasema, var. exigua) which I refer to the 

 hypothallus. Apothecia large, from tubular- becoming clavate-turbi- 

 nate, rusty beneath ; the disk flattish, black ; the stipes of middling 

 length, stout and strong. Spores larger and shorter than those of C. 

 hyperellum, from roundish- becoming short obtuse-ellipsoid, more or 

 less constricted at the middle, or a little longer and more regularly 



