191-1] Setchell: The Scinaia Assemblage 105 



Scinaia moniliformis J. Ag. 

 Plate 12, figs. 31, 32; plate 13, fig. 38. 



J. G. Agardh, Til. Algonies Systematik, IV, p. 72, 1884; 



J. Bracebridge Wilson, Proc. Roy. Soc. Victoria, new ser., vol. 4, jinit 2, 



p. 173, 1892; 

 DeToni, Syll. Alg., vol. 4, sect. 1, p. 105, 1897. 



Plant rose pink(?), 8 cm. high, 7-8 times dichotomons, stout, 

 3-5 mm. in diameter (dried), from a stout solid (?) stipe, regularly 

 and frequently eonstrieted; joints oblong to oblong-cuneate, 3-5 mm. 

 in diameter and 7-13 mm. long, never globular or short pyriform 

 (except perhaps at the extreme apex), thin walled; axis apparent 

 (dried), especially below; cystocarps sparse (in specimens seen), 

 visible; — axial strand fairly stout, of interwoven filaments at the 

 nodes; epidermis of colorless cells, or utricles, with very few widely 

 scattered slender colored cells ; utricles broad palisade-like, flat topped, 

 uniform, 5-6-gonal in surface view (T), 20-22/x (T) by 38(U, (R) as 

 extremes ; colored epidermal cells slender, sparse and widely scattered ; 

 hypodermis of one layer of loosely placed, flattened globular to broadly 

 pyriform cells, 8-1 G^a in diameter; corticating layer thin of scanty 

 slender filaments; antheridia not seen; cystocarps (all young in speci- 

 men examined) elongated pyriform, apparently of the type of true 

 Scinaiae. 



Scinaia moniliformis is known to the writer from the type specimen 

 in Herb. J. G. Agardh at Lund and specimens in Herb. British jMuseum 

 of Natural Plistory at South Kensington. All these specimens were 

 collected by J. Bracebridge AYilson at Port Phillip Heads near Mel- 

 bourne, Australia. It has been possible to examine one of the speci- 

 mens in the J. Bracebridge Wilson collection at South Kensington, 

 to supplement the description of Agardh. That specimen, as are all 

 of them, was young, so that a detailed description of the mature 

 cystocarp is impossible for the present account. The young 

 cystocarp examined had the narrow pyriform .shape usual in the 

 Scinaia assemblage and seemed distinctly to have the gonimoblasts 

 radiating free into the cystocarpic cavity. This, with the possession 

 of an epidermis largely composed of utricles, distinctly stamps this 

 species as a member of the genus Scinaia as limited in the present 

 account. 



From the following species, Scinaia moniliformis is to be dis- 

 tinguished by the usually hmgei-, more regularly oblong joints and 

 certain miiioi- details of structure which will he discu.ssed below. From 

 Scinaia carnasa and Scinaia Salicornioicles, it is amply distinct as to 

 structure of cortex throughout. 



