54 PROCEEDINGS OF THE NATIONAL MUSEUM vol.81 



orange most common; grays and blues occur. Similar data show 

 the normal range for suberea white to crimson, with grays and rosy 

 pinks predominating. 



3. Oscular closing. — In all four of my specimens, undoubtedly 

 domuncvlus^ the numerous oscules closed to a line, not to a point. 

 It is odd that this is not mentioned in the literature; can it be that 

 all four were unusual? This seems unlikely, and I presume this 

 may be a valuable indication when one has fresh material. 



4. Spicules. — Those of suherea are large-headed tylostyles, with 

 the double-headed modification very common. Those of domunculiis 

 are small-headed, so that they approach styles in appearance, and 

 double-headed modifications are uncommon. The species suberea 

 often has microscleres ; doTnunculus., never. I consider the mega- 

 sclere shape very important. 



Lambe found the FicuUna miscroscleres in his material. I did 

 not find them in the Californian specimens, but on the basis of the 

 tylostyle shape alone would feel confident I had Ficulina. Of course, 

 it might be decided to merge Ficulina and Suberltes^ but I can not see 

 that adequate benefit would result from such fusion at present. 



Genus PROSUBERITES Topsent 



PROSUBERITES SISYRNUS de Laab«nfels 



Prosuberites sisymus db Laubenfels, 1930, p. 26. 



Holotype.—\3.^.'^.lA. No. 21413 ; B.M. No. 29.9.30.12. 



Type locality. — South of the breakwater, San Pedro, Calif., 

 dredged by the University of Southern California at 45 meters, 

 April 5, 1924. 



Figure 26. — Prosuberites sisyrnus de Laubenfels, X300 



Additional material exainined. — The University of Southern Cali- 

 fornia also collected a specimen on March 31, 1915, near Catalina 

 Island, and possesses a third without data. On the same date and 

 at the same locality as for the type, but at 54 meters, the University 

 of Southern California collected another specimen, which is so very 

 poorly preserved that it is but a mass of fragments, but from the 

 spiculation it seems probably conspecific. 



Description. — Shape, encrusting. Size, actually probably only 

 1 or 2 mm thick, but so copiously surrounding small worm-tubes, 



