Dr M \ Howi described (Buil. Torre) Bot. ('lul, XXXIV. 1907 

 ,1,, Decne., which he had discovered on plants 



: Montego Uay, Jamaica Since then we also have found sporangia in 

 ..11 the spirit specimen of A.erecta, collected by Mr. Thür 



: in the British Museum (fig 89). These sporangia 

 ., iti! tli- 11 and figures given by Dr. Howe (1. c). They are borne on short 



the surface "t the frond, hut the) are all empty. There is unfor- 

 01 season when Mr. Thurston's specimen was gathered. 



■I KjELLMAN WlTTROCK -'t \ Dl Alg. eXSlCC. n" 



>f pollarded specimens "I -•/. erecta, the fronds ol which have been 

 her animals and are in course of regeneration. Compare note on 



./. ias a distribution reaching trom Madras to New Guinea. 



5. Avrainvillea obscura J. Ag. 



Syn. Anadynomene obscura Ag. Sp. Alg. (1S23} p. 401. 



illea obscura J. Ag. Till. Alg. Syst. V. p. 53; Murray et Bopdle in Journ. of 



t. XXVII. 1889. p. ~\. \K- Toni Syll. Alg. I. 1889. p. 515. 



Hab. Pa< ific. Guham, Marianne Islands, Gaudichaud. 



1 A. Agardh's ori^inal description is as follows: — "? Anadynomene obscura, fronde 

 "cuneata, venis obsoletis. In mari Australi, ad insulam Guham. Specimina dedit Gaudichaud. 

 Radix subbulbosa. Frons ex angustiori basi (quasi stipitata) dilatata, cuneata, longitudine 

 "digitalis, unciam lata, sublobata. Venae implicatae, sparsae, obsoletae, rubrae. Color 

 "virii . luridus. Substantia stipitis firmior, crassior, partis superioris membranacea. 



*An Zoophyton?" 



f. G. Agardh (loc. cit.) gives the following description : - - "Avr. obscura fronde sujjra 

 '•imam basem dilatatam surgente stipite brevi complanato, apice in flabellum terminale latius 

 issum luridum, margine erosum abeunte". And he explains that the "venae" of 

 the elder Agardh are darkcr brown filaments among the ^v>-<-n [Figs. 00, 91]. 



type of this species was collected by Gaudichaud at Guham in the Ladrone or 



Marianne Islan<ls in the Pacifii Ocean, and is preserved in the Agardh Herbarium at Lund 



sity. We have 1 ><•<-!) unable to cxamine even a fragment "f this plant owing u> the 



strin 1 regulation which forbids the loan of any specimen from the Agardh Her- 



we a' atly indebted to Prof. Otto Nordstedi for his kindness in making 



a number of sketches of scune filaments of the plant as well as some 



the specimens which constitute the type (fig. 90). The filaments he kindly 



camera lucida, thereby affording us a fair notion of the main details 



thi ture of the plant fig. 91). The average diameter of the ultimate 



filaments appears to be aboul 30^, and that of their clavate apices reaches 



filaments usuall\- measure 40 — 60 ia, but occasionally reach a diameter 



