Howe: Nores on AMERICAN HEPATICAE 289 
described above as existing between /ungermannia nematodes 
Gottsche and Lefidozia chaetophylla Spruce. The Cuban plant is 
autoicous and in structural characters is essentially identical with 
the typical 4. coactilis. Vestiges of underleaves are occasionally 
met with in both and in both the leaf is sometimes reduced to a 
single prong. 
The specific separation of Arachniopsis confervifolia from A. 
diacantha is possibly open to question, yet in the light of available 
specimens the two appear distinct. Arachniopsis coactilis filifolia 
Spruce, judging from specimens distributed as Arachniopsis filifolia 
in Hepaticae Spruceanae, seems to us less entitled to specific rank. 
Arachniopsis confervifolia resembles Telaranea nematodes in 
outward appearance, but is easily distinguished by the characters 
alluded to above under Zv/aranca. It is to be expected that 
Arachniopsis will be found to occur within the limits of the United 
States, 
IV. Riccta CAMPBELLIANA 
Herr M. Heeg, of Vienna, has kindly called our attention 
(tx htt.) to the close resemblance between the Californian Riccia 
Campbelliana M. A. Howe (Mem. Torrey Club, 7: 26. f/ 97. 
d. t~15, 1899) and the Mediterranean Riccia macrocarpa Levier 
(Bull. Soc. Bot. Ital. 1894: 114. 1894). The similarity is indeed 
very striking as is evident from specimens of XR. macrocarpa which 
ae Owe to Dr. Levier, but R. macrocarpa appears to be uniformly 
dioicous as originally described by Levier and as described again 
by Stephani (Bull. Herb. Boiss. 6: 343. 1898), while R. Camp- 
belliana is uniformly monoicous; and the areolae of the outer 
face of the spores of Riccia macrocarpa are more perfect than in 
R. Campbelliana. In view of these differences the claim of Riccra 
Campbelliana to specific rank seems defensible for the present at 
least. The species has recently been collected by Dr. Walter R. 
Shaw at Claremont, Los Angeles County, Cal., thus extending its 
°wn range about two hundred and fifty miles southward. 
