THE SPONGES OF THE "ALBATROSS" 1891 EXPE- 

 DITION. 



Memoirs of the Museum of Comparative Zoology at Harvard 

 College, Vol. XXX., No. 1. Reports on an Exploration 

 off the West Coasts of Mexico, Central and South America, 

 and off the Galapagos Islands, in charge of Alexander 

 Agassiz, by the U. S. Fish Commission Steamer "Alba- 

 tross," during- 1891, Lieut. Commander Z. L. Tanner, U. 

 S. N., commanding. XXX. The Sponges, by H. V. 

 Wilson. Cambridge, U. S. A., 1904. Pp. 164, with 26 

 plates. 



The following synopsis of results is abstracted from the 

 introduction to the above report. 



The collection of sponges with which the following report 

 deals has been found to include forty-seven species and sub- 

 species. Of these, twenty-six, representing thirteen genera, 

 fall into the Hexactinellida, seven, representing three genera, 

 fall in the Tetractinellida, and fourteen, representing nine 

 genera, fall in the Monaxonida. No calcareous or horny 

 sponges and no Lithistids were taken. As was to have been 

 expected, since the expedition was made in unexplored waters, 

 a very large percentage of the forms (thirty-three species and 

 subspecies) prove new to science. 



LIST OF THE SPECIES TAKEN. 



Hyalonema ovulifcrum F. E. Sch. 



" -pedunculatum, sp. nov. 



" biancJioraium, sp. nov. 



" patcrifcrum, sp. nov. 



" sp. div. 



Euplectella, sp. 

 Regadrella, sp. 



" delicata, sp. nov. 



1905] 85 





