48 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 1 1 



Order ASCONOSA de Laubenfels 



Family Leucettidae de Laubenfels 



Genus LEUGETTA Haeclcel 



Leucetta losangelensls de Laubenfels 



Plate 94, Fig. 188 ; Plate 95, Figs. 189, 190 ; Plate 96, Fig. 191 



Leuconia losangelensls de Laubenfels, 1930, p. 25. 

 Leucetta losangelensls de Laubenfels, 1932, p. 13. 



Diagnosis. — The majority of the specimens of this sponge are amorph- 

 ous, approaching closely, as in the holotype, the form of the Demospongia. 



The principal spiculation is a confused mass of triaxons, both regular 

 and sagittal, with rays varying from 10 ;u, to 45 ju, to 40 fi by 450 /x. Oxeas 

 are occasionally present but are almost certainly not proper. Quadriradi- 

 ates almost never occur. 



Holotype. — U.S.N.M. 



Type locality. — Laguna Beach, California. 



Distribution. — Southern California to the Gulf of California. 



Material examined. — 



Remarks. — This is the most common calcareous sponge of the Gulf. 

 Calcareous sponges do not appear as abundantly in the Hancock collection 

 as one would expect. 



The specimens of this species in this collection do not differ materially 

 from those off southern California, although a few Gulf specimens show 

 a tendency toward a tubelike form. 



Family LeUCOSoIeniidae Minchin 

 Genus LEUGOSOLENIA Bowerbank 

 Leucosolenia irregularis Jenkin 

 Plate 96, Fig. 192 ; Plate 97, Fig. 193 



Leucosolenia Irregularis Jenkin, 1908, p. 44. 



Diagnosis. — As is typical of niembers of this genus, this is a small 

 white sponge rather brittle to fragile in consistency. The spicules are 

 triacts in which one of the rays is much larger than the others, 40 fx by 



