2 Bulletin American Museum of Natural History [Vol. LITII 
to the species, and to be indistinguishably linked to the type by a rather 
complete series of intergrading forms. 
The two apparently new species, Crangon lang: and Clibanarius 
—chapini, have undoubtedly long been confused with others supposedly 
existing on the African coast, but it has not been possible to secure 
material determined by other workers to definitely clear up this point. 
The newly described species are distinct from all previously ee SO 
far as I have been able to ascertain. 
The ranges of a number of species are extended southward along the 
West African coast: Athanas grimaldii, Pontonia tyrrhena, Dardanus 
pectinatus and Upogebia furcata to Angola; and Crangon intrinsecus, 
Dardanus granulimanus, Clibanarius senegalensis, C. cooki, C. africanus, 
Diogenes denticulatus, and Scyllarus arctus paradoxus (?) to the mouth 
of the Congo. 
A review of the zodgeographic distribution of the marine decapods 
is given by Balss in the ‘Beitrage zur Kenntnis der Meeresfauna West- 
afrikas."! Of the twenty-five marine forms he reports from the French 
and Belgian Congo and Angola, only nine are represented in the present 
collection, which, however, has added at least thirteen new records for 
this particular region, two being apparently hitherto unrecognized 
species, the others extensions of range. 
The economic utilization of certain species elsewhere along the West 
African coast has formed the basis of an interesting account by Gruvel 
on ‘ Les Crustacés comestibles de la Cote occidentale d’ Afrique,’? embody- 
ing the fishery methods and species taken in lower Dahomey. The 
Congo Macrura also found on that coast and included in his report are: 
Peneus trisulcatus Leach (=P. caramote Risso), Peneus brasiliensis 
Latreille, Macrobrachium (Palemon) macrobrachion (Herklots), and 
Macrobrachium (Palemon) vollenhoveni: (Herklots). 
Great credit for whatever value this report may have is due to the 
care with which the collections were made by Messrs. Lang and Chapin, 
and the excellent series of the variousspecies contained in those collections. 
The photographs, except the first figure in each of Plates VIII and 
IX taken in the field by Mr. Herbert Lang, are by Mr. Clarence R. Shoe- 
maker. Text figures 67, 68, 69b, 70-73 are the work of Mr. J. F. Mueller; 
the others are by the author. 
Pages 64 to 67 comprise a ““Postscripr”’ embodying several com- 
ments upon two papers which appeared while this report was in press. 
- 11922, III, pp. 89-110. 
21912, Ann. Inst. Océan., V, fasc. 1, pp. 1-16, Pls. 1, 11, text figs. 1-6. 
