56 



Stat. [55. Piapis Bay (Telok Sapira) Northwest coast ofWaigeu [sland. On Turbinaria conoides. 



Stat. i et, West-entrance Selee (Galewo) Strait, New-Guinea. On Gelidium. 



Stat. [65. North-east sul.- of Daram [sland (False Pisangs), East-coast of Misool. On eelgrass. 



Stat. 172. ( iissei . l iss. 



Stat. 1S4. Kampong Kelang, South-coast of Manipa-island. On eelgrass. 



Stat. 213. S.mth [sland near Saleyer. On Laurencia obtusa. 



Stat. 220. Pasir Pandjang, West-coast of Binongka. On eelgrass. 



Island Leyden, Batavia. On Halimeda macroloba, leg. Dr. BOERLAGE. 



Maumeri, Flores. On eelgrass. 



Endeh, Flores. On Laurencia concinna 1 ). 



Makassar. On Sargassum. 



Den Bril, near Makassar. On Laurencia obtusa and Halophila ovalis, leg. SNACKEY. 



1 elebes. On Sargassum and eelgrass. 

 Birakeke, ('elebes. On Sargassum. 

 Balang-Nipa, Celebes. On eelgrass. 



This species attaches itself to a number of different other algae as above stated. It bore 

 reproductive organs the time when collected, from the month of April to the end of the year, 

 frequently, however, sporangia and seldom antheridia. The latter organs are developed in 

 conceptacles which are but 60 — 75 u. in diameter, when seen from the surface. 



( Iccurrence; The plant seems to occur in rather great number at most of the 

 investigated places. 



A r e a : Common almost everywhere except in the arctic and antarctic regions. 



Subgen. Heteroder ma Fosl. 



3. Rlelobesia coronata Rosan. 



Melob. p. 64, pi. IV, fig. 9. 

 f. zonata Fosl. 



Xew Spec. or Forms of Melob. p. 9. 



Stat. 81. Pulu Sebangkatan, Borneo-bank. On Padina. 



Stat. 165. North-east side of Daram Island (False Pisangs), East-coast of Misool. On eelgrass. 



Stat. 213. South Island near Saleyer. On Laurencia obtusa. 



Endeh, Flores. On Laurencia concinna. 



Den Bril near Makassar. On Laurencia obtusa, leg. SNACKEY. 



The form of the species considered as typical which underlies Rosanoff's description 

 1. c, has been found on Pollexfenia pedicellata from Australia, according to specimens in 

 Lenormand's herbarium. An authentic specimen, which I have examined, forms small orbicular, 

 reniform or often crenulate crusts. The latter at length grow more or less confluent. The 

 nproductive organs described by Rosanoff 1. c. as cystocarps are not such ones, but sporangia 

 which an :loped in more nr less conical conceptacles, with cells as a rule much elongated 



1) Where number of station is not quoted, or collector not stated, the specimens have been collected by Madame A. WEBEK.- 

 VAN BOSSE in iSSS — iSSy. This is also the case with a number of specimens belonging to species of other genera classiried in this paper. 

 As they are. however. from the same place, though perhaps not the same localities, as the specimens of the same species collected during 

 the Siboga Expedition, they ave not specially mentioned. 



