74 PROCEEDINGS OF THE ACADEMY OF [1889. 



A different and pretty form of Cliona, and probably an unde- 

 scribed species, is exemplified by specimens obtained on the coast of 

 Florida by Mr. Joseph Willcox. Though from the same locality, 

 they do not appear to accord with the descriptions of Schmidt of 

 Papillina cribrosa and arenosa (Spongien des Atlantischen Gebietes, 

 p. 48). 



In four specimens, of which one is a twin, making, according to 

 the ordinary view, five individuals, all accord in their upright 

 cylindrical, sausage-like form. In their present state all but one are 

 somewhat dusky-white spotted by brownish rings and smooth as if 

 water-worn. The remaining specimen, shorter and more robust 

 than the others, is dark-brown with a yellow tinge on one side of the 

 base and is covered with warts. It resembles in the same condition 

 the appearance of surface of the massive form of Cliona sulphurea, 

 and probably like this, in the fresh state was sulphur-colored. 



The specimens range in length from 90 to 175 mm and from 

 35 to 50 mm in breadth. The summit is rounded truncate, depressed 

 centrally, and in the unworn or more recent specimen imperforate 

 with a short, stem-like tubercle. The base in the latter specimen 

 is truncate, and looks as if it had been cut away from a fixed 

 attachment. Two of the other specimens are rounded in the same 

 position, broken along a semicircle where they seem to have been 

 attached, and have a depression or cave on one side communi- 

 cating with a central perforation. A specimen, 130 mm long and 

 35 mm broad, cut across the middle, exhibits a central cavity extend- 

 ing the length of the sponge, 16 mm wide, and with smooth imperforate 

 sides. The surface of the worn sponges is divided into mostly 

 haxagonal areas 3 or 4 mm wide, with a central circular spot and 

 darker border. In the unworn sponge the hexagonal areas are oc- 

 cupied by a central circular papilla variably prominent, level, or 

 slightly depressed. The exterior of the sponge is composed of a 

 more compact, thin lamina or skeleton of silicious spicules with 

 comparatively little of the softer sponge-structure, while the interior 

 greatly thicker portion extending to the inner cavity is composed 

 of a looser texture of the same kind of spicules with a large propor- 

 tion of the softer structure, pervaded by bands of the more compact 

 substance extending inward from the exterior layer. The silicious 

 spicules of the sponge are of one kind only, pin-like in form, and 

 identical in all other respects, including size, with these of Cliona 

 sulphur en. 



