

ecimen labelled 1>\ De( usnj ".\ ■■ leiosa Lamx.l 



Antilli ■ \ idin)' probabl) representing his idea ol /' dumetosus in 1842, 



he pul 1 of the genus. It has a short stipes and .1 dishevelled capitulum, 



We mal filament (fig. 158a). rhere is also in Herb. Mus Paris another 



men of /' but it is labelled ".V pyramidalis Lmx." in Lamouroux's handwriting. 



\\ , 1 li is .1 young plant, the comal filaments < > f which are not .is long as 



.1 branched comal filament (fig. 15- 

 is .1 figure in K rziNG's lal' Phyc VIII. 1858, which we think ought to be 

 1 species. It is his Corallocephalus affinis (op. cit. tab drawn from 



all plant, the stipes of which has In-en broken off. The comal filaments in the drawing 

 from about 500- 700 ja, thus agreeing with /'. dumetosus. Kt rziNG also figures 

 Lamourouxii op cit tab. 29, I.) which has the lax comal habit of a slender 

 of /'. dumetosus, in which species we should certainly place it. bul for his statement 

 t'nat the magnified portions of filament alongside the main figure are "loomal vergrössert". 

 This would allow these filaments a diameter of t>nl\- 150— tgoju a si/e which is characte- 



ristic of /'. capitatus. But Kt rziNG's figure has not the habit of /'. capitatus. Nor has it the 

 habit oi /', Lamourouxii nor ol /'. Lamourouxii var. gracilis. The question is whether his 

 illocephalus Lamourouxii can be a slender example of P. dumetosus with the magnifica 

 tion wrongly stated. We include it with a query under the present species. This drawin 

 K l'al>. Phyc. VIII. tab. 29. I 1 resembles rather nearly a specimen in the British 



Museum, namely, Mazé's n" 1074 (sul) nom. Penicillus longiarticulatus] from Guadeloupe, 

 which has a similar lax coma and an equally slender stem. but has filaments with a diameter 

 varying from 550— 700^. Another of Mazé's specimens issued sub nom. /'. longiarticulatus \ 

 namely n" 88, i cu ' sér., from Guadeloupe, is a dwarf plant, curiously enough very like 

 ng's other figure (Tab. Phyc. VIII. tab. 30, Corallocephalus affinis) discussed above. lts 

 filaments measure 700^. Again another of Mazé's specimens represented in the British Museum 

 is his n" [66 from Guadeloupe, sub nom. Penicillus clavatus. It has a long compressed dull 

 stipes with dull papillose cortex, slightly widening upwards, and a short dense coma, the fila- 

 ments of which measure from 450 — 500 1;.. and are slightly more calcified than is usual in 

 (umelosus, to which species we refer it. 



The name of P. dumetosus is not employed at all by Mazé and Schramm in their Algues de 



ladeloupe. Possibly they, or rather Crouan, were driven to invent new names for plants which 



would have referred to Lamouroux's Nesea dumetosa, had the figure not been so misleading. 



The geographical distribution of /'. dumetosus is the West Indian region, where it is 



fairly common. 



2. Penicillus Lamourouxii 1 )ecaisne 



Mém. sur les Corallines in Ann. Sci. Xat. sér. 2. torn. XVIII 1842. p. 109. 



\llina penicillus Ellis and Solander Nat. Ilist. of Zoophytes [786. p. i. ,r (pro pari 



'tiidalis Lamouroux Histoire Polypii illigènes flexibles, 1 S 1 r>. p. 258; and 



Mali. 1821. p. 23. 



