M. FOSLIE. [1900 



thick. It passes in to f. compressa, which in a young state occa- 

 sionally shows in part almost plicate branches. 



According to the list of the collection the spedes has been 

 found in the following localities. 



A. No. 12, in part. Ocean Platform, opposite drill Camp, 

 Funafuti. Rather young specimens together with Goniolithon 

 frutescens. 



A. No. 13, in part. Fualopa, Funafuti, about one foot below 

 low water springs. Ouite young specimens, a solitary or a couple 

 of branches in company with Goniolithon frutescens. 



A. No. 14, in part. Fualopa. Rather young specimens of f. 

 abbreviata, growing in company with Lithophyllum onkodes and 

 Goniolithon frutescens. 



A. No. 16, in part. „Nullipore, reddish-brown, from Fualopa, 

 Funafuti. Specimens No. 13, 14, 15 and 16 are all more or less 

 important as reef formers at Funafuti". The present species is 

 here in part anastomosed with Lithophyllum onkodes. 



A. No. 27. „Onoatoa Gilbert Island, a very abundant type 

 and the most important reef former at that Island". „This Nulli- 

 pore, Finckh says, is actually the reef former at Onoatoa. He 

 saw no live Corals there, but everrywhere on the Lagoon and 

 ocean face immence masses of this particular Nullipore". This is 

 the type mentioned 1. c. of L. craspedium f. compressa. 



A. No. 48, in part. „Coral partly overgrown with branching 

 Nullipore from Fualopa, both alive at the time they were collected". 

 The large lumpy Coral is covered with numerous specimens of 

 G. frutescens, here and there with young branches of the present 

 species. 



Lithophyllum onkodes Heydr. 

 in Bibl. Bot. H. 41. Pag. 6. 



I formerly referred this crustlike species to the genus Gonio- 

 lithon. However, after I got specimens with well developed con- 

 ceptacles it is shown to be a Lithophyllum. It is rather varying 

 both in habit and structure. It partly forms thin crusts on bran- 

 ched Corals partly a thick coat on lumpy Corals or other hard 



