84 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Additions to " Oceanic Algology." — A. Mazza {Nuova Notarisia^ 

 1920, 31, 1-64). Additional species of genera and further notes on 

 species already treated in the main body of this work. In the present 

 contribution the note on Porphyroglossum Zollingeri Kiitz. is completed^ 

 and is followed by a discussion of Acanthopeltis japoiiica Okam., Hennedya 

 crispa Harv., Iridaea, Besa papiUseformis Setchell, and a number of 

 species and forms of Gigartina. The notes on structure, nomenclature,, 

 etc., are full of detail. E. S. G. 



Tertiary Calcareous Algae from the Islands of St. Bartholomew^ 

 Antigua and Anguilla. — M. A. Howe {Carnegie Inst. Washington^ 

 Publ. 291, 1919, 9-19). Descriptions and illustrations of the fossil 

 calcareous algge collected in February and March 1914 by Dr. T. AV. 

 Yaughan, in the Eocene limestone of St. Bartholomew, the middle 

 Oligocene formation of Antigua, and the upper Oligocene of Anguilla. 

 The new species are described in detail and compared with already 

 known species. They belong to the genera Archseolithothamiiiwn^ 

 Lithothamniiim, Lithophyllum, and Lithoporella. E. S. G. 



Melobesieae of the Danish Antilles Collected by Dr. F. Boergesen. 

 — ^Madame Paul Lemoine {Bidl. Mus. d'Hist. Nat., 1917, 133-6). 

 Notes on the geographical distribution of the Melobesieae founded on 

 collections made by Dr. Boergesen and those in the Museum of Natural 

 History in Paris. The calcareous algag of the Danish Antilles is limited 

 to four genera, Liihothamnium (4 sp.), Lithophyllum (9 sp.), PoroUthon 

 (3 sp.), and 31elobesia (4 sp.), and nearly all are crustaceous forms. 

 Conditions are apparently unfavourable for branched forms. The dis- 

 tribution throughout the Antilles is fairly uniform, and a certain 

 number of species^ occur also in Florida, the Bahamas and Bermuda. 

 There appears to be no analogy between the species north and south of 

 the equator, two or three only being common to the Antilles and 

 Brazil. Except the ubiquitous Melobesia farinosa there is no species in 

 common between the Antilles and the Atlantic Coasts of Europe, though 

 two of the former have been recorded from Cape de Verde and in the 

 Gulf of Guinea. Certain Antilles species show close affinity with certain 

 tropical Pacific species from Borneo, Sumatra, Caroline Islands, Samoa, 

 Funafuti, etc. Also some Antilles species show remarkable analogy 

 with Mediterranean and E. Atlantic species, both in external characters 

 and in the reproductive organs ; yet in anatomical structure they prove 

 to be far asunder. Similar zoological analogies exist, and have given 

 rise to the hypothetical continent of Atlantis. E. S. G. 



Corallinaceae found in a Limestone in course of Formation in the 

 Indian Ocean.— Madame Paul Lemoine {Bidl. Mus. d'Hist. Nat.^ 

 1917, No. 2, 130-2). The calcareous algae in question were found in 

 a specimen in a miueralogical collection from the island of Mayotte in 

 the Comoro Archipelago. A deposit of limestone is in actual course of 

 formation at the northern end of the islet Pamanzi, by the accumulation 

 of debris, particularly shells, united in a cement of volcanic debris and 

 small fragments of calcareous algae. Among these the author has 



