— 188 — 



and there groups of gland-cells (Fig. 9 A, C). These are pear- 

 shaped, occurring from two to about eight together in a bunch. 

 The cells which bear them are often smaller than the surrounding cells. 



Only sterile plants have been gathered. 



This species seems to me to be most nearly related to Chr. 

 microphysa Hauck judging from the, to be sure rather short, descrip- 

 tion by Hauck (Die Meeresalgen Deutschlands und Oesterreichs, 

 p. 160) and from the figures of this species in the above mentioned, 

 not yet pubhshed paper of Kuckuck. Of the hitherto known 

 Chyysi/menia-species in the West Indian waters this plant comes 



Fig. 9. Clirysymenia pyriformis nov. spec. 



A, transverse section of the thallus, in the middle a cell with glands (70 : 1). B, surface of 

 the thallus (70 : 1). C, membrane of the thallus seen from the inner side, in the middle 



a cell with glands (70 : 1). 



nearest to Chr. 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 shape of the vesicles 

 being pear-shaped, in Chr. Uvaria nearly spherical, and by the fact 

 that the vesicles are larger in Chr. 'pyriformis. Also in the anatomical 

 characters, on comparing the descriptions and figures of both species, 

 a great difference may be seen. 



This species has been dredged in deep water only, in about 

 15—16 fathoms. 



Only found in the sea to the north of St. Jan: off America 

 Hill west of Thatch Island. 



