ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
629 
of the branches of the frond, forming little spherical heads. The male 
plant does not differ, in general appearance or manner of growth, from 
the tetrasporic or sterile plant ; and in one instance, antherids and 
tetraspores were found on the same plant. 
Cystocarp of Callophyllis.* — From observations made on Callophyllis 
laciniata, Miss A. L. Smith concludes that the cystocarp is a compound 
body, and includes the products of a number of procarps. The carpo- 
gone, with its trichogyne, is borne upon one of the smaller cells of the 
medullary tissue, which lies alongside a larger auxiliary cell. After 
the trichogyne has forced its way between the cortical cells, and ferti- 
lized the carpogone, fusion takes place between the carpogone and the 
auxiliary cells. The procarps in each cystocarp are sometimes sepa- 
rated from each other by a mass of tissue, sometimes crowded together 
in immediate contact. 
New Freshwater Floridea.t — Herr G. Karsten describes a fresh- 
water alga from Amboyna belonging to the Florideee, and to the hitherto 
entirely marine genus Delesseria. The frond is of a reddish-brown 
colour, only a single layer of cells thick except at the mid-rib, 2-3 mm. 
broad, and constricted at intervals of 8-10 mm. into narrowly elliptical 
segments ; at these points of constriction numerous rhizoids grow which 
fix the alga to various substrata. The growing point is always recurved, 
and growth takes place by means of a single apical cell, from which 
successive segments are cut off by transverse septa. No organs of 
reproduction were observed. It is named D. amboinensis. 
Chantransia, Lemanea, and Batrachospermum.J — Mr. G. Murray 
and Miss E. S. Barton describe, under the name Chantransia Boweri, a 
new species found growing on Lemanea fluviatilis in Scotland. Not 
only were monospores found, but also antherids, trichogynes, and 
cystocarps. The cystocarps form corymbose stalked clusters of carpo- 
spores, and resemble those of C. corymbifera. 
- The authors dispute the conclusion of Atkinson § that Lemanea has 
itself a Chantransia-fovm , the form so described being, they believe, a 
protonemal form bearing a close resemblance to Chantransia ; and they 
also throw very considerable doubt on Sirodot’s well-known view that 
the freshwater species of the so-called genus Chantransia are but a 
special form of Batrachospermum. They claim to have established a 
freshwater group of species of Chantransia , consisting of C. Boweri and 
investiens, and corresponding to the suppressed genus Balbiania , which, in 
all generic points, resembles the marine species C. corymbifera. 
Classification of Fucoidese.|| — Hr. J. B. De Toni proposes an 
arrangement of the genera of Fucoideae (comprising the Cyclosporinas or 
Fucaceae, the Tetrasporinae or Dictyotaceae, and the Phaeozoosporinte or 
Phaeosporeae) into families. The Cyclosporinae are divided into the Dur- 
villaeaceae, Himanthaliaceae, Fucaceae, Cystoseiraceee, and Sargassaceae. 
* Journ. Linn. Soc. (Bot.), xxviii. (1891) pp. 205-8 (1 pi.). 
t Bot. Ztg., xli. (1891) pp. 265-71 (1 pi.). 
% Journ. Linn. Soc. (Bot.), xxviii. (1891) pp. 209-16 (2 pis.). 
§ Cf. this Journal, 1890, p. 641. 
|| Flora, Ixxiv. (1891) pp. 171-82; and Ber. Deutsch. Bot. Gesell., ix. (1891) 
pp. 129-30. 
1891. 2 Y 
