170 PROCEEDINGS OF THE AMERICAN ACADEMY 



Synalissa melambola, sp. nov. : thallo effuso rimoso-areolato 

 nigro, areolis planiusculis (latit. deiii plusquam 1 millim.) stipitato- 

 elevatis polycarpis ; apotheciis (0,1-0,3 millim. latis) iunatis lecanoriuis 

 disco subpapillato concolore margiiiem teiiuem persistentem demum 

 superante. SporaB octonaj, ellipsoideas, simplices, incolores, loiigit. 

 0,010-12"""-, crassit. 0,005-8"""-; paraphysibus omnino conglutinatis. — 

 Lime rocks, Alabama, Ho7i. T. M. Peters. Thallus cellulose ; the col- 

 logouidia solitary. The reaction of the hymeneal gelatine with iodine 

 is blue. Plant noticeable for its large, flattish, black areoles, which the 

 lens shows to contain from two to six or more very minute but quite 

 regular apothecia. 



Synalissa viridi-rufa, sp. nov. : thallo effuso granuloso mox rimu- 

 loso-diffracto fusco-viridi ; apotheciis (latit. 0,2-0,4 millim., visis) leca- 

 noriuis adiiatis subplanis, disco rufo, margine subpersistente. Sporae 

 octona;, ellipsoideai, Hmbatce, incolores, longit. 0,016-18""-, crassit. 

 0,008-1 0'""'- ; paraphyses conglutiuatte. — Lime rocks, Texas, G. Wright. 

 Structure not very different from that of the last ; rounded, green cel- 

 lules, with mostly solitary collogonidia, which reach a diameter of 12-15 

 mic. The reaction with iodine also as in the last. The lichen is marked 

 among our species of this group by its rather brighter colors. 



Ojiphalaria kansana, sp. nov. : thallo pulvinato coriaceo-cartila- 

 gineo atro e lobulis stipitatis erectis clavatis vel sublobatis vel fructu 

 dilatato pileatis ; apotheciis (0,5-0,8 millim. latis) terminalibus con- 

 coloribus mox convexis margine disparente. Sporse — 12-"'^ in thecis 

 ventricosis, ex ellipsoideo dein ovoideo-oblongte, medioque constrictie, 

 simplices (tenuiter demum uniseptatae ?) incolores, longit. 0,005-8™™-, 

 crassit. 0,003-4"'™-, paraphysibus bene distinctis. — On lime rocks. Chase 

 County, Kansas, E. Hall, 1871. Reaction with iodine, blue. Collo- 

 gonidia mostly collected into small clusters of 3-5, amidst anastomosing 

 filaments, which alone occupy the centre of the thallus : the structure 

 of 0. corallodes (Mass.) Nyl., with which the Kansas lichen appears 

 best to agree generally. The two species differ from Omphalaria 

 PROPER, as here understood {Gen. Lich. p. 81) with umbilicate thallus, 

 in forming cushions of stalked lobes, which become more or less lobu- 

 late above. However ill exhibited this lobate or foliaceous character, 

 it seems enough to give these plants a higher place in the system than 

 that of Synalissa synnphorea. The Kansas lichen is, so far as seen, a 

 smaller species than the European with which it is above compared, 

 and less evidently foliaceous. It is characterized at sight by its ele- 

 vated convex apothecia, looking like nail-heads. 



Leptogiuji rivale, sp. nov. : thallo membranaceo microphyllino 



