CAULERPACEAE 41 
of Rubus) by cupping over a core of the protoplasm of their host. 
They occur at the apices of the ultimate ramuli or of the axes from 
which these ramuli spring; in the latter case they appear to 
inhibit the growth of the axis (Fics. то and тт). The sporangium 
is soon separated from the protoplasm of its host by an irregularly 
dome-shaped hyaline zone, and eventually this seems to be con- 
verted into a solid wall, thus healing the wound to the host. 
The sporangium as a whole commonly has a greenish hue, but this 
is apparently due to the chloroplasts of an axial core that belongs 
to its host. 
PLATE 6, FIGURE А. Bryopsis rhizophora 
Photograph of a dried specimen (Coker 77), natural size. 
PLATE 7. Bryopsis rhizophora 
т. A single plant, natural size. 
2 and 3. Apical parts of pinnae (branches of the first order). 
4. Apical шеш of main axis. 
5. Base of p 
6. Branches en second order, with short rhizoidal processes at base. 
7-9. Bases of branches of the first order, 2—3 cm. above the base of the plant, showing 
elongate rhizoidal 4. ses. 
10-13. Branches showing sporangium-like malformations, apparently due to an 
ungus 
phy 
Figures 2-4 are enlarged 28 diameters; 5-9, 13 diameters; 10-13, 32 diameters. 
Derbesia Balbisiana (Lamour.) Piccone, Bryopsis plumosa 
(Huds.) Ag., and B. Leprieurii Kiitz. are attributed to Peru by 
Piccone,* but we find in Dr. Coker’s collections no material that 
may be referred to any one of these species. 
Family CAULERPACEAE 
CAULERPA Lamour. Nouv. Bull. Sci. Soc. Philom. 1: 332. Му 
1809; Jour. de Bot. 2: 141. 1809. Weber-van Bosse, 
Ann. Jard. Bot. Buitenzorg 15: 259. 1898 
Chauvinia Bory, Voy. Coquille, Bot. Crypt. 204. 1828. 
Tricladia Dec. Ann. Sci. Nat. Bot. II. 17: 337. 1842. 
Herpochaeta Mont. Ann. Sci. Nat. Bot. II. 20: 305. 1843. 
Stephanocoelium Kütz. Bot. Zeit. 5: 54. 1847. 
Corradoria Trevis. Linnaea 22: 131. 1849. 
Himandactylius Trevis. loc. cit. 134. 
Ahnfeldtia Trevis. loc. cit. 140. 
* Mem. R. Accad. Lincei IVa, 6: -(13). 1889. 
