THE SPONGES.. 57 



FARREIDAE F. E. Schulze. 



Parrea Bowerbank. 



1864. Furrea Bowerbank, 1804, p. 204. 

 1887. Farrca Bwk., Schulze, 1887, p. 2G6. 

 1899. " " " 1899, pp. lOe-109. 



Farrea OCCa (Bowerbank) Carter. 



1864. Farrea occa Bowerbank, 1864, p. 204. 



1885. Farrea occa Bwk., Carter, 18S5, p. 387- 



1887. Farrea occa (Bowerbank) Carter, Schulze, 1887, p. 277. 



1895. " " " " p. 67. 



1899. " " " " p. 68. 



Farrea occa claviformis, subsp. nov. 



Plate 0, Figs. 3, 11-14; Plate 7, FiRS. 1-3, 6. 



Diagnosis. Habitus like that of the type. AVitli oxyhexasters. Characteristic dermal 

 clavulae, with smooth ovoidal heads. Characteristic gastral clavulae umbellate, with 

 few (6-9) teeth. 



Station 3425. Two fragmentary specimens. 



The habitus, Fig. 3, Plate 6, is hke that of the type, but the projecting 

 ends flare more. The tube diameter is 10-14 mm. The dictyonal frame- 

 work is single-layered, and the radial tuberculate processes vertical, or 

 nearly so, to the framework. 



The specimens show some vaguely marked elevations, which are prob- 

 ably comparable to the tubular ridges described in this report for Eurcte 

 ercctum, and interpreted as having been produced during the growth and 

 division of the cup-like apertures. 



In spite of the individual variation among the spicules, it may be seen 

 that the dermal pentacts (Fig. 2, Plate 7) are somewhat smoother than 

 the gastral (Fig. 6, Plate 7). Otherwise the two classes are alike. The 

 five rays are of about the same size, and a rudiment of the distal ray ordi- 

 narily persists as a tubercle, which is pointed in some spicules, rounded 

 in others. The precise degree and character of the curvature of the tan- 

 gential rays, and of the tuberculation, and the shape of the ends of the 

 tangential rays, vary slightly. On the outer surface of the tangential 

 rays the tubercles are well developed, elsewhere nearly absent, except at 

 the end of the ray. A common size of ray measures 280 /* x 12 /x. The 

 spicules closely resemble those described by Schulze for the "Challenger" 



8 



