OO ERYTHEA. 



ruary 1, 1896, was fixed with 1% chroiuic acid, and sectioned by 

 use of the ordinary paraffiue method. The peduncles are found to 

 possess uniformly throughout their entire length but a single root- 

 hair furrow, as shown in Fig. 1, and the nrchegonia occur in groups 

 oifoiir, alternating with the rays, as is shown in tlse horizontal sec- 

 tion represented in Fig. 2. The latter section is very slightly 

 oblique and exhibits only three archegonia in one of the four groups, 

 but the fourth appears in a neighboring section at a little different 

 level. Figs. 1 and 2 were made by tracing over photomicrographs 

 taken by Dr. Edward Learning, of the College of Physicians and 

 Surgeons, Columbia University. So far as we know, but a single 

 archegonium of a group is fertilized. The evident discrepancies 

 between our observations and those of Stephani will possibly lead to 

 the suspicion that there has been some confusion of plauts. Yet we 

 are informed that the specimen sent to Herr Stephani by Mr. Cook 

 came from the Underwood Herbarium, and all the specimens of 

 Cryptomitrium now in the Underwood Herbarium a.re apparently 

 identical with ours even in the matter of possessing unicanaliculate 

 peduncles. The carpocephala in the Underwood Herbarium are 

 too old to enable us to determine the number of arcliegouia with 

 certainty. 



The operculum of the capsule in Cryptoviitrmm teneruni is com- 

 posed of two layers of cells, while the walls are otherwise unistratose, 

 a fact which has not been noted hitherto. This is shown in Figs. 3 

 and 4, whicii are camera-lucida sketches of vertical sections of the 

 walls of nearly mature capsules. 



Blasia piisilla L. Beside a pool. Blue Lake, Humboldt Co. 



Pellia Neesiana (Gottsche) Limpr. In shaded places ])eside 

 streams. North Fork of Little River, Mendocino Co. 



Riccardia pinguis (L.) S. F. Gray (Aneura pinguis Dumort.). 

 In a mountain stream, Hay Fork, Trinity Co. Also collected by 

 Professor Underwood in Marin Co. in 1888. 



Riccardia major (J^eQ&) Lindb. [Aneura multifida (L.) Dumort., 

 var. major Nees]. Common on moist banks and on logs and stones 

 about streams in the Coast Range. 



Riccardia rmdtifida (L.) S. F. Gray, var. ambrosioides (Nees) 

 Lindb. On decaying wood and moist banks, Olema, Mendocino, 

 Eureka, and Hay Fork. 



