— 186 — 



The transverse section shows the membrane-cells to be roun- 

 dish-rectangular (Fig. 6C); seen from the surface they are irregu- 

 larly polygonal or oblong, two — three times as long as they are 

 broad (Fig. 6^). 



On the inside of the membrane we find here and there a 

 single cell bearing glands (Fig. 6 A, J5, C). These are obovate-oval 

 with somewhat acute base when seen from the side (Fig. 6 D) and 

 occur in small groups or they are more spread out upon the surface 

 of the mother-cell ; a number of ten or more can be found on the 

 same cell. 



At the constrictions between the junctions there is a tissue 



consisting in the middle of 

 very large cells covered by 

 smaller ones and at the sides 

 passing evenly into the peri- 

 pheral membrane. 



No tetrasporic plants oc- 

 curred in my material. But 

 in the "Phycotheca Bor.- 

 Am." Nr. 386 a tetrasporic 

 specimen collected at Key 

 West, Florida by Mrs. G. A. 

 Hall is distributed. The 

 tetraspores which occur scat- 

 tered over the whole thallus- 

 surface in the bark layer are cruciately divided. 



Of a cystocarpic plant I have gathered a small part ; the cysto- 

 carps are scattered over the surface of the thallus ; they are hemi- 

 spherical, prominent and provided with an apical porus. Fig. 7 

 shows a longitudinal section through the middle of a nearly ripe- 

 ned cystocarp; in the middle the placental branch is seen from 

 which the gonimoblasts are formed. As is most commonly the case 

 in Chrysymenia no special net-work surrounding the nucleus is 

 present in the cavity of the cystocarp. 



This species has been dredged in deep water only (12 — 15 

 fathoms). 



It has been found with cystocarps in the month of March. 

 In the Danish West Indies this species has hitherto only been 

 found in the Sound between St. Thomas and St. Jan off Cruzbay 

 and in the sea north of St. Jan off America Hill. 



Fig. 7. Chrysymenia Enteromorpha Hai'v. 



Longitudinal section through the middle of a 



cystocarp (70 : 1). 



