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PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXVI. 



of the sponge. Each measures about 0.325 mm. in diameter (the 

 shape being spherical) and is provided with a single straight for- 

 aminal tubule on the summit. The granular coat is feebly developed, 



but there is a strong outer chiti- 

 nous coat in continuity with the 

 basal membrane. The gemmule 

 spicules lie in this coat parallel 

 or almost parallel to the surface 

 of the gemmule but crossing one 

 another at all angles. 



Ilahitat. — Camp Keithly, Lake 

 Lanao, Mindanao, Philippine Is- 

 lands. Altitude 2,250 feet. Mary 

 Strong Clemens, collector, Jan- 

 uary, 1907. 



Ty i>e->ij)ecimen. — Cat. No. 7719, 

 U.S.N.M. 



Remarks. — This sponge, which I 

 have much pleasure in namhig 

 after its discoverer, is evidently 

 very distinct from 

 S. ph Hipp i n e n s i s 

 (with which it was 

 apparently found 

 in close associa- 

 tion), differing in 

 its shorter and 

 smoother skeleton 

 spicules, more reg- 

 ular skeleton. 



thicker basal mem- 

 brane, and adherent 

 g e m m u 1 e s with 

 their ill-developed 

 granular coat. It 

 approaches t hose 

 forms I have re- 

 cently grouped to- 

 gether in a new subgenus {Stratospongilla °) , but differs from them 

 in its slender gemmule spicules. On the whole, despite this differ- 

 ence, I think that it should be associated with them. 



Pic;. 4. — Spongilla clementis. a, skeleton spicules : 



h, GEMMULE spicule; C, FRAGMENT OF SKELETON. 



"■ In an account of the fresh-water sponges collected by Prof. Max Weber in 

 S. Africa published in the Zoolog. Jahrbiicher, 1909. 



