80 THE JOURNAL OF BOTANY 
number of bristles attached to each cell, and by the thick lamellose 
cell-walls. 
The genus Conochate Klebahn (1893) also bears a certain amount 
of resemblance to Polychetophora, but the nature and arrangement 
of the Bee which are sheathed, are very different. 
87. stropsis Ricutert (Schmidle) Lagerh. in Tromsé Mu- 
seums havea 17, 1894, p. 20, t. i. f. 8-27. Huastrum Richtert 
Schmidle. Long. ccenob. 10°8-18-2 »; long. cell. 4°5-6 p; lat. 
8 py 
Hab. as Senens, Cornwall, amongst other alge. 
This interesting plant has only previously been found in Ger- 
ney os oe Schmidle in 1898) and in Norway (by Lagerheim in 1894). 
OTINA RETICULATA Dang. ‘Mémoire sur les Algues,’ Le 
et Bog ‘1889; Chodat et oe in Bull. Soc. Bot. France, 
tom. xli. 1894. Diam. cell. 9-138 
Hab, Churchill, Go, Donegal, ‘Tat 
This interesting alga approaches nearer to Calastrum Nig. than 
to any other genus of the Protococcoidew. The cells are kt 
and each one is enveloped in a delicate hyaline membrane, which 
sends off thin delicate prolongations. The cells are connected 
delicate than in C@lastrum, and the young antocolonneld are retained 
as parts of the original colony, whereas in the latter genus hey are 
generally set free. 
Inerrieiata West & G. 8. West, 1897; char. emend. 
Cellule parve, ovate vel ellipsoideo-ovate, in familias parvas 
subsphiericas libere natantes formantes; chromatophoris singalia 
parietalibus cum pyrenoidibus singulis ; familiis cavernosis, e strato 
cellularum periphericarum constitutis, sepe — atic 
membranam vetustam reticulatam inclusis, membrana in lobos v 
processus vel spinas irregulares ss familie in canbe lid cee 
sociate ; colonize parve spe coloniis magnis cum partibus 
~ aetae vetuste durissimee sctajtine 
NEFFIGIATA microm st & G. S. West in Journ. Roy. 
iia ‘Soo. 1897, p. 503 (description imperfect). Seeded idem 
ac generis. Dia bi fam. sing. 21-56 »; diam. colo 5 
long. cell. 5-7-10°5 p; lat. cell. 3:4-5°3 p. (PL. 447, has: 1-6.) 
ab. Generally distributed in stagnant waters throughout the 
British Islands, United States, India and Ceylon ; also Italy, Tyr rol. 
The previous description of this alga, which appeared in 1897, 
was very incom ~ ete. Since then we have obtained specimens 
from every part of the British mea and have examined the 
more doteiled. cui of the plant. Hach family of cells is 
chromatophore containing a single small pyrenoid. The outer 
surface of each family of cells is covered by a tough elastic 
membrane of irregular form. This membrane consists partially of 
