82 MORPHOLOGY AND TAXONOMY, BRYOPHYTES [Bot. Absts., Vol. V, 



thallus, and there are no pit connections between the cells in the lower layers of the crust. 

 Litltophyllum leptothalloidcum and L. Mildbracdii are described as new. These are thin crus- 

 taceous species, the former growing on L. africanum, the latter on stones and rocks. The anat- 

 omy and reproductive bodies of each are described. Amphiroa annobonensis also is described 

 as new. Extended observations are made on the cellwall and tetrad cohesion of the cells in 

 the Corallinaceae. The author finds that a middle lamella is present and therefore the whole 

 gelatinous mass seeming to lie between the cells is really cell wall, and the calcium carbonate 

 is actually deposited in the wall. The contributions of Yendo and Mme. Lemoine are cited. 

 The author differentiates between pores due to the breaking down of the wall and true pits; 

 and considers this to be of systematic value. — K. M. Wiegand. 



610. Reverdin, L. Le Stephanodiscus minor nov. spec, et revision du genre Stephano- 

 discus. [Stephanodiscus minor n. sp. and a revision of the genus Stephanodiscus.] Bull. 

 Soc. Bot. Geneve 10: 17-20. 22 fig. 1918. — A new species of Stephanodiscus (Diatom) with 

 three to six silicious appendages is described and compared with the other two species of the 

 same genus. — W. H. Emig. 



Gil. Smith, Catharine, W. Variation in the number of ribs in Costaria costata. Publ. 

 Puget Sound Biol. Sta. 2: 207-312. 1919. — While the number of ribs reported in literature 

 is 3-5, the author finds that the number may be as high as 11. The number is not necessarily 

 constant throughout the length of the same frond. — T. C. Frye. 



612. Yendo, K. A monograph on the Genus Alaria. Jour. Coll. Sci. Imp. Univ. Tokyo 

 43 : 1 . 1919. — Deals mainly with the taxonomy of this genus but considers briefly various mor- 

 phological details, the economic uses, and the distribution of these large marine algae. A 

 considerable bibliography is included. — G. J. Peirce. 



613. Zimmermann, Ch. Quelques diatomees nouvelles ou curieuses. [Some new or 

 peculiar diatoms.] Broteria Ser. Bot. 17: 97-100. PI. 3 (5 fig.). 1919.— Eight of the nine 

 forms mentioned are proposed as new, viz. : Navicula cardinaliculus var. margaritacea, 

 N. Jeqaitinhonhae, A 7 . Torrendii with var. capitata and forms typica and nana, N. mutica 

 var. rhombica, Achnanthcs lanceolata var. brasilie?isis , Fragilaria undulata var. brasiliensis. 

 All forms mentioned are figured, and all are from Brazil. — Edward B. Chamberlain. 



MORPHOLOGY AND TAXONOMY OF BRYOPHYTES 



Alexander W. Evans, Editor 



614. Amann, Jules. Additions a la flore des mousses de la Suisse. [Additions to the 

 moss flora of Switzerland.] Bull, de la Murithienne 1916-18: 42-66. 1919.— The author first 

 gives a large number of localities extending the range of species listed in the Flore des mousses 

 de la Suisse [see Bot. Absts. 4, Entry 1032], and mentions a number of forms now first re- 

 ported for the region, usually accompanying these reports with short descriptive notes. He 

 proposes the following species as new: Amblystegium ursorum, Bryum perlimbatum, Ceratodon 

 mollis, Desmatodon spelaeus , Didymodon riparius (notKindb.), Lesquereuxia glacialis , Mnium 

 adnivense, Pseudoleskeclla ambigua, Ptychodium abbreviatum, P.-albidum, and P. pallescens. 

 Under the genus Ptychodium he gives a key to the Swiss species and states that between Les- 

 quereuxia saxicnla and Ptychodium plicatum a long series of transitional forms occurs, so that 

 sterile material can not be definitely determined. At the conclusion of the paper he lists, 

 as an example of the general trend of moss associations in the high-alpine region, twenty-one 

 mosses and one hepatic found growing on the mica-schist of the Combin de Corbassiere (Pen- 

 nine Alps) at an altitude of 3600-3700 m. — Edward B. Chamberlain. 



615. Bristol, B. Murtel. On the gemmae of Tortula mutica, Lindb. Ann. Botany 34: 

 137-138. 5 fig. 1920. — This is a note recording the discovery of a specimen of Tortula mutica 

 which bore numerous gemmae scattered over the surface of the leaf. The gemmae are borne 

 on one-celled stalks and generally consist of two or four cells. — W. P. Thompson. 



