147 



Hildenbrandia Nardi Zanardini, Synopsis Algarum in Mari Adriatico 

 hucusque collectarum (Acad. R e delle Sc. di Torino, Cl. mat. e fis., 2 ser., 

 t. IV, p. 238, tab. 1, fig. 1). J. AGARDH, Spec. Alg., II, p. 494, III, p. 379. 



Hildenbrandtia sanguined Kiitz., Phycologia generalis, 1843, p. 384, 

 tab. 78, V. 



This alga has been found in shallow water near the shore 

 covering stones and pieces of rocks. 



I have compared my plants with European specimens from 

 various places and they seem to agree quite well with these. The 

 cells in the vertical rows of cells in the thallus are about 4 5/* 

 broad. HAUCK 1. c. says that they are 4^. 



The irregularly shaped tetrasporangia are cruciately divided 

 but often the walls are placed rather anomalously. The tetra- 

 sporangia are about 25 /* long and 13 fj. broad. 



This plant occurred in more sheltered places. As I previously 

 have mentioned *) its thin purple-reddish crusts were found upon 

 stones in a lagoon at St. Groix growing in the shade of the man- 

 grove trees; at St. Jan it was growing upon small round stones 

 in a more open place. 



St. Croix: Saltriver Lagoon. St. Jan: Cruz Bay. 

 Geogr. Distrib. : Jamaica, Brazil, Atlantic Ocean, Mediterranean 

 Sea, Pacific Ocean etc. most probably ubiquitous. 



Fam. 5. Corallinacece. 

 Subfam. 1. Melobesieae. 



Par M me PAUL LEMOINE. 



L'importante collection de Melobesiees recueillie par M. BOERGE- 

 SEN au cours de ses voyages aux Antilles Danoises avait ete con- 

 fiee a M. FOSLIE, de Trondhjem, quo la mort a surpris (1909) 

 avant qu'il ait pu terminer son travail. II restait a determiner 

 un certain nombre d'echantillons; M. BOERGESEN a eu 1'amabilite 

 de m'en proposer 1'etude. Quelques-unes des especes determinees 

 par M. FOSLIE etaient nouvelles; au fur et a mesure de ses 

 determinations il les avait decrites dans ses Algologiske notiser, 

 mais sans les figurer. Aussi ai-je repris 1'etude de toutes ces 

 especes 2 ) de maniere a pouvoir donner ici un memoire d'ensemble 



') BORGESEN, F., The algal vegetation of the lagoons in the Danish West 

 Indies. Biologiske Arbejder tilegnede EUG. WARMING. K0benhavn 1911. 



") Ce travail a 6te fait au Laboratoire de Cryptogamie du Museum d'His- 

 toire naturelle de Paris (Professeur MANGIN, membre de 1'Institut). 



10* 



