490 Howe: PHYCOLOGICAL STUDIES 
species made in February, 1904, by Dr. D. T. MacDougal, in 
San Felipe Bay, 500 miles or more north of La Paz and near the 
head of the Gulf of California, is reported upon; of these we have 
ventured to propose one species as new. In the list are included 
also three other species from La Paz, which came to the herbarium 
of the New York Botanical Garden in 1904 through the purchase 
of the herbarium of Dr..C. L. Anderson, of Santa Cruz, California. 
CHLOROPHYCEAE 
Uva Fasciata Delile, Fl. Egypte 153. pl. 58. f. 5 
La Paz, Vives 12 and 24. 
The specimens appear to approach Setchell’s forma expansa. 
The thallus is only 35-55 thick and the cells in the older parts 
are often subquadrate in cross section, but in these respects the 
plants do not differ much from the New York Botanical Garden 
copy of Phyc. Bor.-Am. LXXVII, distributed as Ulva fasciata 
forma expansa Setchell. 
Utva Lactuca ricipa (Ag.) Le Jolis, Liste Alg. Mar. Cher- 
bourg 38. 1863 
Ulva rigida Ag. Sp. Alg. 410. 1822. 
San Felipe Bay, D. T. MacDougal, Feb. 1904. 
Thallus 36-42 thick, brownish, becoming almost livid. 
(?) ENTEROMORPHA INTESTINALIS (L.) Grev. Alg. Brit. Lxvi, 179. 
3 1830 
La Paz, Vives 16. 
Inconspicuously proliferous near base, the proliferations often 
short and spinescent; membrane 40-54u thick; cells mostly 13- 
254 in diameter, rather thin-walled, in cross section of thallus 
about 40u long, exclusive of outer walls; attached to the stalks 
of a Sertularian (?) animal. 
ENTEROMORPHA Linza (L.) J. Ag. Till Alg. Syst. 3: 134. 1882 
Ulva Linza L. Sp. Pl. 1163. 1753. 
San Felipe Bay, D. T. MacDougal, Feb. 1904. 
The plants are small and unusually narrow (4-10 cm. long, 
I-6 mm. wide) and their margins are plane or nearly so. They 
