—96 



sertion of leaf, the alar hyaline and more or less inflated-rectangular to rhom- 

 boid; branch-leaves ovate, rounded at the base, decurrent, concave, erect-spread- 

 ing, not markedly plicate, entire to slightly serrate at the apex, strongly costate 

 to slightly above the middle, about 1.5-2 mm. long by 0.6-0.9 mm. wide, slen- 

 derly acuminate; leaf-cells of branch-leaves similar to those of the stem-leaves, 

 the median cells being often relatively shorter; perichaetial leaves ecostate or 

 sometimes slightly colored-striate at the base, clasping below, abruptly narrowed 

 above into a slender, elongate, entire, spreading acumination: seta 2-2.4 cm. 

 long, rich castaneous, flexuous-erect, twisted, slender, strongly papillose through- 

 out; capsule castaneous, i. 9-2.1 mm. long, 0.7-0.8 mm. thick, horizontal or 

 slightly ascending, arcuate, constricted below the mouth when dry, oblong-cy- 

 lindric; operculum and calyptra not seen; peristome normal for the genus, the 

 segments split and widely gaping, the basal membrane about two-fifths the height 

 of inner peristome, the cilia i or 2, about as long as the segments, very slender 

 and quite distinctly appendiculate; spores yellowish, rather thick-walled, about 

 19-23 fx in diameter. Antheridia not found. 



Type: Deposited in the Herbarium of the Carnegie Museum, Pittsburgh, 

 Pa. No. 83,402, Herb. Geol. Surv. Canada, Plants of Queen Charlotte Islands. 

 Collected at Skidegate, July i; 1910. W. Spreadborough. No. 83,383 of the 

 same collection and with same data is evidently the same species. 



By the courtesy of Prof. J. M. Macoun, Curator of the Herbarium of the 

 Canadian Geological Survey, the writer recently had the pleasure of examining 

 a set of mosses collected in 1910 on the Queen Charlotte Islands, off the northern 

 coast of British Columbia, by W. Spreadborough. The specimens described 

 above as a new species approach quite closely Brachythecium suhasperrimum 

 Card. & Then (Bot. Gaz. 37: 377-8. 1904.), but are considerably larger in 

 vegetative characters, the spores also being mostly over 20/i in diameter as 

 against 15/x for suhasperrimum, the branch-leaves being somewhat decurrent, 

 most of the leaves being quite entire, and but few of the leaves being plicate 

 when moist. The writer has therefore thought best to propose a new species. 

 The accompanying figure is self-explanatory. 



Carnegie Museum. 



EXCHANGE DEPARTMENT 



Offerings — To Members only, for stamped and self-addressed envelope. 



Mr. E. B. Chamberlain, 18 West 89th St., New York City. — Braunfelsia 

 scariosa (Wils.) Paris, c. fr. and Campylopus Nietneri (C. Muell.) Jaeg., st., both 

 collected in Ceylon by Dr. Max Fleischer. 



Mrs. Annie Morrill Smith, 78 Orange St., Brooklyn, New York. — Cladonia 

 fimhriata (L.) Fr. and Usnea harhata (L.) Fr. c. dasypoga Fr. 



Mr. George B. Kaiser, 508 Locust Ave., Germantown, Pa. — Platygyrium 

 repens (Brid.) B. & S., c. fr., collected in Philadelphia, Pa. 



H. S. Jewett, M. D., 15 W. Monument Ave., Dayton, Ohio. — Hypnum 

 reptile Michx., collected at Littlejohn Island, Me., and Plagiothecium deplanatum 

 (Schimp.) Grout, collected in Greene Co., Ohio. 



Miss Helen E. Greenwood, 5 Benefit Terrace, Worcester, Mass. — Frullania 

 Asagrayana Mont., collected in Nova Scotia, July, 1912. 



