Fishes that Build Nests 



401 



Photo from Hugh M. Smith, U. S. Bureau of Fisheries 



A Sheepswool Sponge of an Unusual Shape 



From Mateciinibe Key, Florida. Diameter of wreath, 30 inches ; width of sponge proper, 

 7 inches; weight (dry), I pound 7 ounces. The sheepswool is the best sponge found on the 

 shores of the western Atlantic, and, while coarser in texture than the best Mediterranean 

 sponges, it is more durable (see page 399) 



mation is meager for almost all fishes, 

 and especially meager for American 

 forms. The sources of knowledge have 

 not been discovered by the compilers of 

 such works, but he who might judge 

 from Ihe paucity of data that no others 

 could be found would be much deceived. 

 To uncover some of the interestine de- 



tails hidden in comparatively little known 

 journals and other works is the object 

 of the present article. 



The species which manifest care for 

 their young are so numerous that the 

 present article must be restricted to those 

 which are inhabitants of fresh water. 

 Such are better known than the marine 



