248 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 12 



and producing flagelliform holdfasts 5-15 mm long, which at their ends 

 give rise to oval to fusiform secondary blades which may repeat the proc- 

 ess more sparingly so that 3-4 generations may attach to the parent disk; 

 the disks structurally showing a medulla with one or two central cell 

 layers with colorless rather thick- walled cells to 100-250 /a diam., and on 

 each face 1-2 layers of smaller cells; cortex of 1-2 close basal layers of 

 rounded cells and radial cell rows 2-3 layers deep, the cells rather loosely 



placed. 



The flagelliform haptera of this plant penetrated the sponge on which 

 it grew quite deeply, and the blades lay against its surface. In the absence 

 of any reproductive organs the generic assignment of this plant is pro- 

 visional. 



Ecuador: Archipielago de Colon, spreading over and rooted in a 

 large sponge dredged from 55 meters' depth off Post Office Bay, I. Santa 

 Maria, no. 34-370 (TYPE), 29 Jan. 1934. 



Fauchea (?) crispa^^^ 

 Plate 83, Fig, 2 



Plants small, firm and crisp in texture, somewhat involved, very ir- 

 regularly branched and curled, the segments 2-5 mm wide, the apices 

 rounded, thickness about 170 fx; structure showing a medulla of 2-3 

 layers of somewhat compressed cells about 120 /x diam., a subcortex on 

 each side of two layers of cells about 15 fx diam., and a one-layered cortex 

 of rounded cells 3-5 /x diam., separated by lateral walls of about 1-3 fi; 

 cystocarps commonly marginal, about 0.3 mm diam., less often facial, 

 superficial but sessile, with a thick ostiolate pericarp, the carpospore mass 

 basally attached with a small-celled loose placental tissue, and without 

 filamentous investment in the mature stages, though a very few filaments 

 were visible in young stages. 



Mexico: Nayarit, dredged from 22 meters' depth at sta. 970 near I. 

 Maria Magdalena, Las Tres Marias, no. 39-662B (cystocarpic, TYPE), 

 9 May 1939. 



This plant resembles Gloioderma japonica Okamura (1936, p. 664, 

 fig. 316) in habit, though smaller and closer branched, but the thallus 

 structure is without evidence of filamentous character. In this it suggests 

 Leptofauchea, except that the thallus is of more cell layers than L. nito- 

 phylloides (J. Ag.) Kylin (1931, p. 9, fig. 3b). It also differs from Gloio- 

 derma in the absence of hornlike projections on the pericarps. Since there 



153 Fauchea crispa n. sp. — Plantae parvae, crispatae, irregulariter ramosae 

 intricataeque, segmentis 2-5 mm diam., circa 170 M- crass., apicibus rotundatis; 

 cystocarpis plerumque marginalibus, 0.3 mm diam. Planta typica in loco dicto I. 

 Maria Magdalena, Las Tres Marias, legit W. R. Taylor no. 39-662B, 9 May 1939. 



