402 



pointed out, nearest to Chrysymenia Uvaria. But among other 

 characters, e. g. the small size of the thallus in comparison with 

 that of Chr. Uvaria, it is easily distinguished from this species 

 by the pear-shaped vesicles, in Chr. Uvaria nearly spherical, 

 and by the fact that the vesicles are larger in Chr. pyriformis. 

 In the anatomical characters also, for instance in the shape 

 and occurrence of the glands, a great difference may be seen 

 when comparing the descriptions and figures of both species. 



This species was dredged in 

 deep water only, at about 15 

 -16 fathoms. 



Found in the sea to the north 

 of St. Jan: off. America Hill west of 

 Thatch Island. 



Geogr. Distrib. : Found at the 

 Bermuda Isles by COLLINS. 



6. Chrysymenia Uvaria (L.) J. Ag. 



J. AGARDH, Algae maris Mediter- 

 ranei et Adriatici, p. 106; Epicrisis, 

 p. 324; Florideernes Morphologi, tab. 

 XVI, figs. 2022. HARVEY, Nereis 

 Bor.-Americana, Part II, p. 191, pi. 



XX, B, flgS. 13. B0RGESEN, F., 



W. I. Floridea?, II, p. 189. KUCKUCK, 

 P., Untersuchungen liber Chrysymenia 



(Beitr. z. Kentn. d. Meeresalgen, 13, p. 214, pi. 13, figs. 14 15). 

 Fucus Uvarius L., Syst. Nat., 1767, II, p. 714. 



Gastrodonium uvaria Kiitz., Spec. Alg., p. 865; Tab. Phycol., vol. XV, 

 tab. 97. 



As pointed out by KUCKUCK, the West Indian plants attain 

 a much larger size than those found in the Mediterranean Sea. 

 Several of my specimens reach a height of up to 20 cms. The 

 American specimens are proportionally more slender than those 

 from the Mediterranean Sea, and the distance between the ve- 

 sicles is mostly larger. 



As to the anatomy, the wall of the vesicles consists inwardly 

 towards the cavity of larger cells, and of smaller outwardly ( Fig. 

 388 A). The cortical layer is dense (Fig. 388 C); covering 

 the underlying large cells completely. The large cells are, when 



Fig. 387. 



Chrysymenia pyriformis Borgs. 



Transverse section of the stem. 



(About 65:1) 



