60 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 81 



140/1. Some authors synonymize caruncula with sanguinea, but 

 there seem to be no British intergrades between the blood-red, long- 

 spiculed form and the yellow or orange short-spiculed form; our 

 Califomian sponge might be considered such an intergrade, or 

 rather a distinct species, since we have here none just like either 

 caruncula or sanguinea. H. caruncula was from British waters. 



In 1911 (page 13), Wilson described Stylotella heliophila from 

 the Eastern United States (Beaufort, N. C). This differs from 

 sinapium only in having a slightly crisper consistency and more 

 uniformly orange color. Possibly sanguinea, luxuriant, carunculay 

 heliophila, sinapium, and perhaps even more species, put in at least 

 five different genera, may be really synonymous; they are certainly 

 very closely related. 



HYMENIACIDON UNGODON, new species 



Holotype,—{].S.'^M. No. 22061; B.M. No. 30.10.8.4. 

 Type locality. — The holotype was collected by me at Point Lobos, 

 south of Carmel, Calif., intertidal, July 12, 1930. Otherwise I have 

 seen this species several times in collections made by students. 

 It is probably a moderately common sponge in central California. 

 Description. — Shape, encrusting. Size, 1 cm by 3 cm by 4 cm at 

 least, probably often larger. Consistency, soft. Color in life, ma- 

 hogany-brown ectosome over yellowish-drab endosome. Oscules, in- 

 frequent, oval, about 1 mm in long axis; they are closable by a, 



membrane. Pores, incon- 

 spicuous, usually found 

 closed. The surface is 

 coarsely rugose. 



FiGDRE ^Q.-Hymeniaoid^n^^ungodon, new species, EctoSOmal specializa- 



tions, fleshy, densely 

 packed with spicules in confusion, not very easily detachable. 

 Endosomal structure, fleshy, with spicules strewn mainly in utter 

 confusion. In places there seem to be vague ascending tracts, but 

 these may possibly be due merely to proximity of canals from which 

 the spicules are excluded. This results in concentrations of spicules 

 in the regions between the canals. 



Spicules, styles 4/^ by 180/^ to 8ju, by 200|a, with a few very much 

 thinner that were probably immature forms (fig. 30). 



Remarks. — Quite a few species of the genus Hymeniacidon have 

 ectosome differently colored from the endosome, but the particular 

 color scheme of ungodon seems characteristic and unique in the 

 genus. The method of closure of oscules by a membrane stretching 

 across instead of sphinctrate contraction is worthy of note. In at 

 least some portions of the endosome of the present species were 



