ART. 4 



SPONGES OF CALIFORNIA DE LAUBENFELS 



91 



almost twice as large as those of spongigartina. The peculiar 

 nature of the orifices of spongigaHina is most noteworthy. 



Another genus worthy of mention here is Lcptosastra Topsent 

 (1904, p. 194), type species L. constellata, which has astrose micro- 

 scleres instead of the chelas. If these asters be derived from such 

 deformed chelas as are foimd in Leptosiopsh^ and the chelas of 

 Lepfosiopsis be regarded as deformities of the symmetrical ones of 

 A nuata, then these three genera might be regarded as a linear series. 

 This is, of course, mere speculation. 



ANAATA BREPHA dc Laubenfels 



Auata brepha de Laubenfei^s. 1980, ]). 27. 



Holotype.—V.S.^M. No. 21427; B.M. Nos. 29.8.22.3G, 29.8.22.5T. 



T]/pe locality. — Pescadero Point, near Carmel, Calif., intertidal, 

 May 11, 1929, collected by me. It was growing over the shell of 

 a Hinnites (a large sessile bivalve mollusk). The locality was 

 about 5 meters from that of the holotype of Anaata sponglgartina. 



Description. — Shape, encrusting. Size, well under 1 mm thick, 

 and covering a shell about 7 cm in diameter. Consistency, mediocre. 

 Color in life, salmon red ; 



A 



C 



dry, brownish red; in 

 alcohol, pale fle.sh color. 

 The Hinnites was full 

 of minute ova and was 

 extruding these at the 

 time of collection. The 

 sponge was exactly the 

 same color a»s these eggs. 

 Oscules, not e am d e n t. 

 Surface, superficiall}^ 

 smooth but following 

 the ver}' rough contours 

 of the shell of the 

 scallop. 



Ectosomal specialization, not discernible because of the extreme 

 thinness of the sponge. The styles were very definitely dermal, how- 

 ever. Endosomal structure, no order discernible (note above), be- 

 cause of the thinness of the incrustation and the great irregularity 

 of the substrate. 



Ectosomal spicules, styles (fig. 53, A) ; size, 3/x by 190ju, to 3/t by 

 210^,. Endosomal spicules, acanthotylostyles (fig. 53, B) : size, 8/y. 

 by 95/i to 8/i, by 130/i. Microscleres, arcuate isochelas (fig. 53, C- 

 G) ; length, 17/x to 21/x. 



FiGURB 53. 



-Anaata ircpha de Laubenfels : A-C, 

 X300; others, X 1,333 



