M. FOSLIE. [1900 



thin and not sharply defined layer of rather irregular and more 

 or less bent cell-rows, with the cells up to 24 p. long but frequently 

 shorter, and as a rule thinner walls than in the typical form. 

 However, it shows even in this respect transitions to f. typica, in 

 which some irregularity and a rather feebly developed hypothallus 

 occasionally is to be seen. 



The sporangia in f. funafutiensis, not mentioned 1. c, are 

 four-parted, 150 — 180 by 60 — 100 //-. The conceptacles of cysto- 

 carps are scattered and on the whole rather scarce, conical, acute 

 and of about the same diameter as those of sporangia. 



The present form seems to be common in deep water at 

 Funafuti. According to the list compiled by the collector the spe- 

 cimens preserved have been tåken under the following conditions. 



A. No. 19. Falefatu, 38 fathoms. „Mass of dead Porites 

 encrusted by Nullipore with live Lithodomus boring the Porites". 

 This mass is in the part which has turned upwards coated with 

 L. Philippii f. funafutiensis, and rather resembles in habit B. 

 No. 13, with well developed conceptacles of sporangia. 



A. No. 21. Funamanu, 45 fathoms. „ Dead reefCoral coated 

 with Polyzoa, Sponges, etc." A large piece here and there coated 

 with a few small crusts of the present species, in part provided 

 with young conceptacles. 



A. No. 22. Depth 80 fathoms off Funamanu, Funafuti. 

 „Crateriform (fungoid?) Coral with Nulllipore, Sponges, Polytrema, 

 etc.)". In some of the pieces from this considerable depth are also 

 to be found a few rather young crusts of the present plant. 



A. No. 24. Funamanu, Funafuti, depth 80 fathoms. «Frag- 

 ments from P/2 in - t° 4 in. long of Nullipore (encrusting), with 

 Halimeda, large disc-shaped Foraminifera, Alcyonarian, selerobasic 

 Corallum, coated with Nullipore, etc". Some of the pieces are 

 here and there coated with small and young crusts of the species 

 in question, in part furnished with conceptacles of cystocarps. 



B. No. 13. Off Tutanga, Funafuti, 41 fathoms. Aug. 1898. 

 „A loose slab of pinkish to dull pale crimson 1 ) Nullipore something 



' l ) Including a young l'eyssonelia not determined. 



