1914] Setchell: The Schmia Assemblage 107 



Scinaia carnosa Harv. 



Plate 11, figs. 25-27. 



Harvey, Algae of Ceylon (Exs.) No. 38, and in J. G. Agardh, Spec. Alg., 

 vol. 3, 1, p. 513, 1876, vol. 3, 2, pp. 15, 112, 1880. 



Ginnania carnosa Harvey, in Kuetzing, Tab. Phyc, vol. 16, p. 30, pi. 83, 1866. 



Plant deep red. opaq^^e, up to 17 cm. high, 9-10 times diehotomoiis, 

 slender, 2mm. in diameter (dried), cylindrical, deeply constricted at 

 irregular intervals; axils narrow; no axis visible (dried) ; cystocar|)S 

 scattered, barely visible; — axial strand of .stout and slender filaments 

 intertwined ; epidermis of colorless cells ; colorless cells flat-topped, 

 closely packed, palisadedike. 20-22/x (R) by 5-8/* (T) ; hypodermis of 

 2-3 compact layers of nearly globular cells; corticating layer thick, 

 compact; antheridia not seen; cystocarps broad pyriform. abruptly 

 narrowed into a very distinct cylindrical neck, 280-300;Lt (T) by 240- 

 260^ (R) ; gonimoblasts very numerous and slender, radiating from a 

 distinct and considerable cellular placenta, abjointing successively 

 globular(?) spores; periderm compact, of 6-8 layers, fibrous-pseudo- 

 parenchymatous. 



Scinaia carnosa Harvey is founded on a plant from Ceylon dis- 

 tributed by Harvey under No. 38 of his Ceylon Algae, with printed 

 label giving the name but no description. The specimen in the writer ',s 

 possession agrees exactly with the description and figure of Kuetzing 

 (1866. pi. 70. f. a, h, under Ginnania carnosa) in habit and structure. 



By the structure of the cortex, viz., the very much elongated 

 palisade-like utricles of the epidermis, the compact hypodermis and 

 the thick, compact corticating layer, this species differs from all other 

 Scinaiae except Scinaia Salicornioides Avitli wliich it may be identical. 

 The reasons for keeping the two distinct in this account are given 

 below under the latter species. Both Scinaia carnosa and Scinaia 

 Salicornioides are irregularly constricted and it seems pro])able that 

 the constriction is due to accident rather than to a regular process of 

 growth. The scarcity of specimens does not allow any satisfactory 

 settlement of this (juestion just a1 present, but since the descriptions 

 and figures show eons! rict ions and all specimens mentioned or avail- 

 able show them, it seems best to refer both six'cies to this particular 

 group until farther observations and study are possible. 



