718 MINNESOTA BOTANICAL STUDIES. 
The delicate moniliform stipes, and the thin external margin 
of the apical articuli are the important characters of this spe- 
cies to distinguish it from the preceding species. 
Comparatively common; low tide mark, also in pools. 
6. Cheilosporum MacMillani sp. nov. Plate LII., Figs. 4 and 5; 
Pl. LVI., Figs. 11-14. 
Fronde crassa nudusculo-stipitata, 4-10 cm. alta, inferne sub- 
teretibus superne flabellata bi-tripinnata; pinnis pinnulisque 
creberrimis erecto-patentibus sursum sensim brevioribus: articu- 
lis stipitum cylindraceis diametrum subzquantibus, mediis et 
superioribus compressis medio ventro elevatis, hexagonis vel 
cuneato-deltoideis diametro sesquibrevioribus, pinnarum anci- 
pitibus lineari-sagittatis vel lanceolatis, ultimio ellipsoideis 
szepe incrassatis; conceptaculis verruceformibus in utraque 
facie instructis vel subcompressis in apicibus pinnularum im- 
mersis, nonnunquam pyriformibus pedunculatis. 
This plant has its articuli of the upper part of the main 
branches more highly elevated on the ventral side than on the 
dorsal. The articuli of the lower portion are thick and monili- 
form, gently compressed upwards: in the upper and middle 
portion they become hexagonal or truncated, shorter than the 
breadth. 
According to the description* of Amphiroa wardi Harv. and 
Amp. mallardie Harv., the present species has some common 
characters with them so that I hesitated for a time to name it as 
a new species. But the attachment of the conceptacles of our 
plant is rather peculiar, only one similar example being hitherto 
known in Chezl. maximum.+ The eramiferous articuli of the 
pinne of ours are lineari-sagittate with lobes projected upwards ; 
and the articuli of the upper portions of the main branches are 
hexagonal, much broader than the height. These various char- 
acters may easily distinguish ours from Harvey’s plants. Not 
common; low-tide mark. 
e 
7. Corallina officinalis var. chilensis Kitz. Pl. LIV., Fig. 1; 
be Fe BF ea a 
Fronde erecta, 5-10 cm. alta, inferne teretiuscula, superne 
flabellata bi-tripinnata: articulis inferioribus compressiusculis, 
* Harvey: Nereis Austr., p. 99. 
+ Yendo: Cor. verae Japan. (Journ. of Sci. Coll. Tokyo, vol. XVI., art. III.) 
a at ii 
