ART. 4 



SPONGES OF CALIFORNIA de LATJBENFELS 



19 



diacts 20 to 30 mm lonir. Gastralia hypodermal, abundant pentacts, 

 each arm 200/x lon<r. There are further a few diacts about 2 mm 

 lono;, perpendicular to the surface and in, but not protruding from, 

 the ch)acal hiyer. Parenchymalia principalia, oxeas about 30 mm 

 long. Parenchymalia comitalia, strongyles almost tylotes, with 

 spined heads and four hemispherical protrusions so placed centrally 

 as to indicate that this is a reduced hexact. Size, about 0.016 by 3 

 mm. Parenchymalia intermedia, oxyhexasters, all or most of the 

 six primary rays being dichotomously branched. Each ray totals 

 about 45/x long. There are also discohexasters of about 180/i total 

 diameter. 



Figure 8. — HtuurovaUiutus solidus Scluilzc : A, Oxyhexasters ; B, discohex- 

 aster; C, one of the smaller pentacts. x300 



Remarks. — Schulze's description is rather brief and is based in a 

 large measure on a comparison to Staurocalyptus doivUngi (Lambe) 

 Ijima. This latter form is described as having discohexasters 250/t 

 to 320/i, in diameter, as compared to S. solidtis, which has discohex- 

 asters 150/j, to ISOfi in diameter; moreover, the former is semistipitate, 

 but in other respects the two forms are practically identical. I follow 

 Schulze in retaining these as separate species for the time being but 

 with serious doubts. It is very possible that future work may show 

 that >S'. solklus should fall as a synonym to S. doioUngi. 



STAUROCALYPTUS FASCICULATUS Schulze 



Stnurocnlyptus fasciculatus F. E. Schulze, 1899, p. 53. 



Holotype.—U.S.^M. No. 7580. 



Tijpe locality. — Albatross Station 2979, north of Santa Cruz Island, 

 Calif., depth 690 meters, mud Ijottom. 



