106 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 12 



Ecuador: Archipielago de Colon, dredged from 27 meters' depth 

 at sta. 167 off I. Santa Maria, nos. 34-284, 34-287B, 19 Jan. 1934. 



Sporochnus rostratus n. sp."^^ 

 Plate 2, Figs. 12-17; Plate 17, Fig. 1 



Plants to over 2 dm tall, delicate, the axis once alternately branched, 

 like the branches filiform, below about 0.5 mm diam. ; fertile branchlets 

 short stalked, the slender stalk about 0.3-0.8 mm long, bearing a thicker 

 subcylindrical fertile portion 1.0-2.5 mm long, which in turn is tipped by 

 a very delicate styliform tip 1-3 mm in length, generally a little longer 

 than the fertile portion, and which in turn bears a cluster of brown fila- 

 ments 3-5 mm long; paraphyses with stalks expanding somewhat to the 

 end, where the end cell is turbinate, 13-20 /x diam., 13-14 /u, long; game- 

 tangia subcylindrical to oval or slightly obovoid, 28-31 /t long, 8.5-10.5 

 ft diam. 



This interesting species is most satisfactorily compared with S. stylosa 

 Harvey from New Zealand, a plant with similar style-tipped fertile 

 branchlets. In the absence of New Zealand material and lack of measure- 

 ments in the original description there may be doubt of its distinctness, 

 but there is so little in common between the Ecuadorean and the New 

 Zealand floras that it is most safely assumed to be distinct. 



Ecuador: Archipielago de Colon, dredged from 37 meters' depth at 

 North Bay, I. Marchena, Schmitt no. 311B-35, 3 Dec. 1934. Ibid., 

 dredged at sta. 167 from 27 meters' depth off Post Office Bay, I. Santa 

 Maria, no. 34-287A (TYPE), 19 Jan. 1934. Ibid., rare as dredged 

 from 12.5-18.0 meters' depth at sta. 193, no. 34-365, 27 Jan. 1934. Ibid., 

 dredged from 37 meters' depth off a rocky bottom, I. Espafiola, Schmitt 

 no. 362B-35, 19 Dec. 1934. 



Desmarestiaceae 



DESMARESTIA Lamouroux, 1813 

 Plants arising from a basal disk, filiform, compressed or foliaceous, 

 and when flat often with a midrib, oppositely or alternately branched; 

 growth trichothallic at least at first, in structure showing an axial cell 

 row and a parenchymatous cortex; sporangia formed by the conversion 

 of superficial cells of the thallus; gametophyte microscopic, filamentous, 

 oogamous. 



£,.7^ Sporochnus rostratus n. sp. — Plantae altitudine maiores 2 dm, tenues, alterne 

 fihformiterque semel divisae; ramusculis fertilibus stipitem brevem atque partem 

 fertilem subcylindricam 1.0-2.5 mm long, habentibus, parte fertili cacumen styli- 

 forme 1-3 mm long, habente, quod penicillum terminalem sustinet; paraphysibus 

 clavatis, cellula terminali expansa turbinataque; 13-20 \x, diam., 13-14 \i long.; 

 sporangiis ovatis, 28-31 n long., 8.5-10.5 n diam. Planta typica in loco dicto Post 

 Office Bay, I. Santa Maria, Ecuador, legit W. R. Taylor no. 34-287 A, 19 Jan. 1934. 



