S'MChromatophonestellAle PAPE E LP EPP EEE EE aan: 21. Ch. immersa. 
5. Chromatophore much divided ................... 22. Ch. Polyidis. 
II. Subg. Grania. Chromatophores ribbon-like, spiral-shaped, usually more than 
one; carpogonia often intercalary; carpospores seriate. Group IV. 
1. Filaments usually 5—6 » thick; free descending filaments usually 
present; sporangia tetrasporous or monosporous, on alternate or 
opposite branchlets; sex-organs present .................... 23. Ch. efflorescens. 
1. Filaments near the base 6—9 y (or thicker); free descending fila- 
ments usually wanting; sporangia or sporangia-bearing branchlets 
seriate on the inner side of the branches; sex-organs wanting 24. Ch. peclinata. 
Subgenus Euchantransia. 
Group I. Frond epiphytic with a single basal cell. 
1. Chantransia gynandra sp. nov. 
= 
Thallus minutus. E cellula basali subglobosa, diametro 7,5—9 x, egrediunt 
fila 2—4 simplicia, ad circ. 200 „ alta, e cellulis diametro plerumque 2—3-plo long- 
ioribus, crassitudine 5—6 », superne nonnunquam leniter (ad 7 4) incrassatis, con- 
stantes. Ramuli nulli vel pauci, minuti, unicellulares. Chromatophorum parietale 
zonale, pyrenoide instructum, mediam partem cellulæ occupans. Pili hyalini ter- 
minales et laterales adsunt. Sporangia, antheridia et carpogonia in uno eodemque 
individuo occurrunt. Sporangia in filis lateralia sessilia solitaria vel in uno arti- 
culo duo approximata vel opposita, vel in ramulis terminalia monospora, ovata, 
long. 9,5—10 y, lat. 5—6 ». Carpogonia in filis lateralia. Antheridia ad apicem 
ramulorum solitaria vel sæpius gregaria vel carpogonio juxta trichogynum solitaria 
imposita, hemisphærica, oblique breviter ovata vel subconica, long. c. 2,5 4. Cysto- 
carpia Capitula irregularia e filis radiantibus longitudine vario constantia, carpo- 
sporis in cellulis ultimis, sporangiis similibus, formatis. 
This interesting species was found in abundance growing on some specimens 
of Ectocarpus confervoides dredged in the Northern Kattegat. The nearly globular 
basal-cell, which is fixed to the host by a very thin layer of a cementing substance, 
gives off a filament upward and usually two similar, though often shorter, fila- 
ments out to the sides. The filaments are either absolutely unbranched or bear, 
besides reproductive organs, only a few one-celled or rarely two-celled branchlets. 
The cells which are usually a little constricted at the transverse walls, contain a 
belt-shaped, rather narrow chromatophore containing a pyrenoid projecting inward. 
Hyaline hairs always occur; they are either terminal on the filaments and the 
branchlets or lateral. The hair situated at the top of the terminal cell is later 
pushed to the side, the terminal cell growing out beyond the insertion of the hair 
(fig. 18 K) which, after the next cell-division, comes to be situated at the upper end 
of the subterminal cell. Nearly all the lateral hairs have developed in this manner; 
