«5 



we do not know, since we have not seen the original specimen (Herb. Richard). It is strange 

 that Decaisne makes no reference to Nesea eriophora Lamx. in his monograph. Agardh's 

 suggestion that it was merged in P. Lamourouxii by Decaisne is untenable. Agardh had 

 never seen Decaisne's type of P . Lamourouxii. It occurs to us that the type of N. eriophora 

 Lamx. ma)- when examined prove to be a specimen of RhipocepJialus PJioenix with its comal 

 flabellules so lacerated and disintegrated as to have lost its generic character. There is in the 

 British Museum an ancient specimen (Herb. Samuel Dale) approaching such a condition and 

 presenting in part an appearance of cotton-wool (see p. 97). 



The geographical distribution of P . capitatus is confined to the region of the West Indies. 



4. Penicillus pyriformis A. & E. S. Gepp 



in Journ. of Bot. XLIII. 1905. p. 1, pi. 468, fig. 1. 

 Syn. Penicillus Lamourouxii Mazé et Schramm Algues de la Guadeloupe 1870 — 77. p. 91 (pro parte). 

 Penicillus dumetosus Dickie in Journ. Linn. Soc. (Bot.) XIV. 1874. p. 312. 

 Penicillus dumetosus Murray in Journ. of Bot. XXVII. 1889. p. 238 (pro parte). 

 Penicillus capitatus Murray loc. cit. (pro parte). 

 Penicillus pyriformis Collins Green Alg. N. Amer. in Tufts College Studies II. 1909. p. 393. 



Hab. ATLANTIC. Bahamas, Bemini Harbour, April 16 1904, in 1 — 8 dm. of water, low tide, with 

 P. capitatus, Rliipocephalus Phoenix, etc. M. A. Howe, n° 3236, in Herb. Mus. Brit. ! - 

 Bahamas, Mariguana Island, Hozve, in Phyc. Bor. Amer. n° 1477! — Bermuda Islands, 

 Eli's Harbour, Somerset, on sandy bottom in 1 — 2 feet of water at low tide, Howe n° 244! - 

 Key West, Harvey ! and Hooper in Farlow, Anderson and Eaton's Alg. Exsicc. Amer. Bor. 

 n" 43 (pro parte) in Mus. Bot. Copenhagen ! -- St. Thomas, 5 — 15 fathoms, " Chal/cuger" 

 Expedition! and 20 fathoms, Börgesen, n° 1137 (pro parte)! — Guadeloupe, Pointe a Pitre, 

 ilet a Jarry, Masé n° 488 in Herb. Mus. Brit. ! — Without locality, Herb. Sloane, in Herb. 

 Mus. Brit. ! — Without locality, Lord Valentia, in Herb. Mus. Brit. ! 



Stipes short, not running up into capitulum, sometimes branched, 10 — 30 mm. long, and 

 6 — 7 mm. thick, somewhat compressed, with surface uneven, appearing caespitoso-papillose 

 under microscope. 



Capitulum pyriform, large, (5 — -7 cm. long, 3 — 4.5 cm. wide), sometimes infundibuliform, 

 compact, thick and glaucous-green when dried. 



Filaments of capitulum calcified, ascending, matted together, crowded, 150 — 200 u. in 

 diameter, divaricate, sometimes globosely constricted above or below the dichotomy. 



Filaments of stipes bearing lateral appendages 3 — 4 times dichotomously divided and 

 terminated by tapering acute dactyline apices. [Figs. 169 — 171]. 



This species was discovered by Dr. M. A. Howe in the Bahamas and Bermudas and 

 with his courteous permission was described by us in 1905 (loc. cit.). When growing with other 

 species it can be recognised at once, as Dr. Howe pointed out to us, by its pyriform shape 

 (fig. 169), the density of the capitulum, the distinct interlacing of the filaments, and sometimes 

 also by its infundibuliform habit. W T e believe also that the clensely papillose cortex of its short 

 thick stipes is an infallible character (fig. 1710). The plant occurs in large colonies, and always 

 with the same characters. 



In the size and crowding of the filaments it is most nearly allied to P. capitatus, from 



