25 ULVACEAE 
U. S. Expedition under the command of Lieut. Wilkes, according 
to a specimen in the Columbia College Herbarium, under the name 
Ulva latissima. 
PLATE I. Ulva fasciata costata 
otograph of a біле ср once-forked plant (Coker тоз p.p.—írom liquid pre- 
servative), natural size 
PLATE 2, FIGURES 10-23. Ulva fasciata costata 
10. A portion of the ribbon-shaped thallus, with indications of the costa and the 
ertile marginal bands. 
тт. Basal part of a plant with indications of the thickened axis, the foliar Age: and 
the inversely cupulate basal callus surrounding a Corallina segm 
12, 13. Cross sections of the basal callus with Corallina in thé axis. 
14-17. Cross sections, successively higher, of the base of the thallus. 
18. Outline of the median portion of a cross section of the main thallus, showing 
osta of about twice the thickness of remaining lamina. 
19. EN section of the costa, showing vertically elongate vacuolate cells. 
20. Cross section of the fertile border, showing character of the sporangia, marginal 
cells, etc. 
21. Cross section of margin of thallus where the orientation of the cells makes the 
extreme margin almost 3-stratose. All of the cells here except the extreme 
marginal pair become sporangia. 
22. A marginal cross section where the orientation of the cells makes the extreme 
argin almost 4-stratos 
23. A cross section through iie Ы at the juncture of the sterile area and Ше. 
ertile border. 
All of the figures are drawn from the type material (Chincha Islands, Coker 103. 
Figure то is of the natural size; 11-17 are enlarged 9 diameters; 18, 16 di- 
Gaston: 10-23, 330 diameters. 
Ulva simplicissima Clem. was attributed to Callao by Hum- 
boldt, Bonpland, and Kunth (Nov. Сеп. et Sp. Pl. 7: 418. 1825). 
We have not seen their specimens and do not know to what they 
applied this name, which is currently cited in the synonymy of 
Scytosiphon lomentarius. Possibly an Enteromorpha was intended. 
Ulva planca Suhr (Flora 23: 277. 1840), described from Peru, 
has apparently been overlooked or ignored by subsequent writers. 
We have not seen it and do not recognize it from Suhr's descrip- 
tion, but it seems safe to express the opinion that it is not an Ulva 
in any modern sense. 
ENTEROMORPHA Link, Hor. Phys. Berol. 5. 1820 
ENTEROMORPHA BULBOSA (Suhr) Mont. Voy. Bonite, 
Bot. Crypt. 3. 1846. J. Ag. Till 
Alg.Syst. 3: 139. 1882 
Solenia bulbosa Suhr, Flora 22: 72. pl. 4. f. 46. 1839. 
ына сд вә ан 
шаһқа АА <= а аза ЧЕ лесі 
