NO. 1 DICKINSON : SPONGES OF GULF OF CALIFORNIA 37 



Holotype. — AHF no. 20. 



Type locality. — San Jaime Bank oJEf Cape San Lucas; Lat, 22° 50' 

 30'' N, Long. 110° 15' W; 150 m; old coralline algae, granite rock. 



Distribution. — Same. 



Material examined. — 

 Sta. 618-37 San Jaime Bank 3-3-37 150 m 



Remarks. — This is a new genus to the Pacific Coast. The new species 

 is typical of the genus, but no other species approaches it in spicule size. 



Genus LAXOSUBERITES Topsent 



Laxosuberites rugosus (Schmidt) 



Plate 67, Fig. 134; Plate 68, Figs. 135, 136 



Suberites rugosus Schmidt, 1868. 

 Laxosuberites rugosus Topsent, 1896. 



Diagnosis. — The Gulf of California specimen of this sponge is an 

 incrustation 1 cm thick and about 6 cm square. It is white in alcohol, 

 fairly smooth on the surface, and has numerous cones about 5 mm high 

 by 1 cm at the base irregularly placed. Each cone is surmounted by a 

 closed oscule. When the surface is cut away, veiy regular passages 1 mm 

 in diameter and perhaps 2 mm apart are found leading vertically. When 

 the sponge is cut, this gives the edge an appearance of very regular vertical 

 structure. 



The spicules are styles to tylostyles, which at the surface are arranged 

 in tufts, point upward. Typical measurements for our specimen are 120 ji* 

 by 6 /A and 260 /x by 8 ^u,. Those of the holotype are described as 1 75 ju, to 

 375 ju, and about the same thickness as ours. 



Holotype. — Paris. 



Type locality. — Mediterranean, 



Distribution. — Cosmopolitan. 



Material examined. — 

 Sta. 552-36 Angel de la Guardia Island 3- 6-36 Shore 



Remarks. — ^The sponge, which is provisionally identified as Laxo- 

 suberites rugosus, has a genotype originally from the Mediterranean. 

 There is little difference between members of this genus, and L. rugosus 

 may easily embrace all of the species. 



Laxosuberites zeteki de Laubenfels 

 Plate 69, Figs. 137, 138 ; Plate 70, Fig. 139 



Laxosuberites zeteki At Laubenfels, 1936, p. 450. 



Diagnosis. — The Gulf specimen of this sponge is massive and resembles 

 in gross structure a mass of giant fingers fused. The ends of the "fingers" 

 protrude and give the surface a lumpy appearance. The color is bright 



