NO. 1 TAYLOR: PACIFIC MARINE ALGAE 277 



sporangia and spermatangia formed in large sori between the midrib and 

 the blade margin; procarps with one carpogenic branch, cystocarps situ- 

 ated on the midribs, the gonimoblasts forming spores in chains, enclosed 

 in prominent pericarps. 



Hypoglossum abyssicolum n. sp.^^* 

 Plate 89, Figs. 1, 2 



Plants small, to 9 cm tall, the lower branches denuded, slender and 

 firm, sparingly divided, above broadly and delicately alate, the wings one 

 cell thick and without lateral veinlets, the midrib becoming inconspicuous 

 to the unaided eye in the ultimate divisions ; blades in juvenile or sterile 

 plants lanceolate, tapering nearly equally to the subacute base and apex, 

 reaching 2.5 cm in length and 5 mm in width, but in older plants to 7.5 

 cm long, showing the typical apical growth of the genus ; branches arising 

 from the midrib; cystocarpic plants bushy, with blades to 3.5 cm long 

 (or more ?) and 6 mm wide, the terminal when fertile commonly short 

 and broad, 0.7-1.5 cm long, 4-5 mm wide, with broadly obtuse ends; 

 cystocarps generally single on the midrib of the blade, 0.9-1.2 mm diam. 



The plant discussed by Gardner (1927, p. 104) as H. attenuatum 

 may well consist of rather depauperate individuals. If this be true, then 

 the present specimens may be of the same species. Most of them were 

 sterile and were likewise small and sparingly branched, but the blades 

 tapered rather equally to both ends and they were rather broader and 

 much less acute than Gardner describes. One sterile plant was 9 cm tall, 

 sparingly branched, but the blades similarly tapered. The cystocarpic 

 plant was, however, quite distinct, and the writer interprets it as ap- 

 proaching more closely the true habit of the species. It has, on more 

 actively growing blades, the same rather acute tips seen on the sterile 

 pieces, but the fertile lateral branch lobes of the same individuals are 

 rounded to subtruncate or even emarginate. The plants are much more 

 deeply rose colored when dried than is H. tenuifolium of the Caribbean 

 area, but are probably closely related. 



Mexico : Nayarit, dredged from 24 meters' depth at sta. 970 o^ Las 

 Tres Marias, no. 39-649, 9 May 1939. Costa Rica: rare fragments 

 dredged off Pto. Culebra, no. 34-529, 24 Feb. 1934. Colombia : Valle, 

 rare on I. Gorgona, no. 34-494B, 12 Feb. 1934. Ecuador: Archipiel- 

 ago de Colon, rare as dredged from 56 meters' depth off Post Office Bay, 

 I. Santa Maria, no. 34-381 (cystocarpic, TYPE), 29 Jan. 1934. 



173 Hypoglossum abyssicolum n. sp.— Planta ad 9 cm altitudine, sparsa divisa, 

 infra denudata, supra delicate alata, costa sursum inconspicua evadente, venis 

 lateralibus absentibus; laminis sterilibus lanceolatis, ad 2.5-7.5 cm long, 5 mm 

 lat. ; ramis e laminis fertilibus cystocarpicis 0.7-1.5 cm long., 4-5 mmlat., obtusis, 

 enascentibus, cystocarpis plerumque in costa singulis. Planta typica in loco dicto 

 I. Santa Maria, Ecuador, legit W. R. Taylor no. 34-381, 29 Jan. 1934. 



