NEW LICHENS 43 



normaliter octonis, elongato-clavatis, sursum latioribus, interdum 

 guttulatis, hyalinis, 1-septatis, majusculis, 0'032-37 mm. longis, 

 0-010 mm. latis. 



Ad litora humida arenacea. 



Collected at Formby, Lancashire, by Mr. J. A. Wheldon in 

 spring. The thin grey thallus follows the inequalities of the sub- 

 stratum. The scanty algal symbiont, Trentepohlia, has the deep 

 yellow colour of the gonidia characteristic of many maritime spe- 

 cies. The perithecia are few and inconspicuous ; the spores resemble 

 in form those of A. epidermidis, but they are much larger. 



Arthopyrenia foveolata, sp. n. Thallus tenuis subflavo- 

 virescens vel obsoletus. Perithecia minuta, nigra submersa, foveo- 

 lata, subintegra ; tunica superne nigra ad basim brunnea ; para- 

 physibus paucis vel obsoletis ; ascis cylindraceo-clavatis, 0-070- 

 80 mm. longis, 0-017 mm. crassis ; sporis octonis, 1-septatis, hya- 

 linis, oblongo-ovatis, utrinque angustatis, 0-015-18 mm. longis, 

 0-006-7 mm. latis. 



Ad conchas mari ejectas. 



Collected by Mr. E. M. Holmes at Robin Hood's Bay, York- 

 shire. It differs from A. litoralis, which also grows on shells, in 

 the size of the perithecia, and in their immersion in the substance 

 of the shell. 



Arthopykenia halodytes var. Hollii, var. nov. Thallus 

 lurido-nigrus, late effusus, minute rimoso-areolatus. Perithecia 

 similia typi iis. 



Ad saxa maritima. 



Collected by the late H. B. Holl on rocks near the sea between 

 Barmouth and Dolgelly, Merioneth. The thallus covers consider- 

 able patches with a thin blackish crust ; the minute areolation 

 is only visible under high magnification, but is sufficiently marked 

 to give the whole plant a scabrid appearance. 



Arthopyrenia Crombiei, sp. n. Thallus effusus, tenuis, sub- 

 flavus, vel rubro-fuscus, subnitidus. Perithecia sparsa, minuta, 

 hemispherica, dimidiata, immersa, ostiolo minuto notata ; ascis 

 obovato-cylindraceis, circa 0-055 mm. longis, 0-017-20 mm. latis ; 

 paraphysibus paucis, confertis ; sporis octonis, oblongo-clavatis, 

 3-septatis, 0-020-22 mm. longis, 0-005-6 mm. latis. 



Ad corticem arborum {Alni). 



Collected by the late J. M. Crombie on the banks of the Garry, 

 Blair-Athole, Perthshire. It is closely allied to A. suhmicans, but 

 differs in the form of the spores, which tend to break up into 

 halves, and also in the presence of the rather stoutish paraphyses. 



Leptorhaphis Carrollii, sp. n. Thallus crustaceus, tenuis, 

 subfuscus. Perithecia minuta, nigra, sparsa, hemispherica, im- 

 mersa, dimidiata, ostiolo minuto notata; paraphysibus gracilibus, 

 ramosis, confertis ; ascis cylindraceis, circa 0-090-100 mm. longis, 

 0-010 mm. latis ; sporis octonis, parallelo-dispositis, filiformibus, 

 obscure multo-septatis, 0-050-80 mm. longis, 0-001-2 mm. latis, 

 rectis vel curvatis. 



Ad corticem arborum. 



E 2 



