CRATEROMORPHA MEYERI. 57 



Differential Key to the Specie.^. 



"• — Dormnlin, cxclu.sively or predominantly pcntactins. Itiscohoxasfer, spherical, up to 

 a')Oiit 50 a in diameter, 

 a».— Dermalia intermixed witli some stanractinic forms. Hypodermal ])entactins not 

 conspicuonsly thick-rayed (not over 100 a in hreadtli of rays at basel 

 a-.— Sponge-body smo.ith n\\ the outside, tlie entire sponççe being exquisitely wine- 

 glass-like C. meyrrl .J. PI Gbay. (Philippines; Saganii Sea). 



/>".— Sponge-body with rounded tnberole-like prominences on the outside 



C meyeri inberosa Tj. (Sagami Sea, Snruga Bay\ 



'^''^•— ^^ouse-body with numerous wrinkle-like ridges and irregular prominences on the 



outside C. meyeri rugosa Ij. (Sagami Sea). 



i\— Dermalia exclusively pentactins. Hypodermal pentactins have rays of striking 



thickness (000 ;j. or more at base) C. pacliyaclina Ij. (OH' Shikokn, Japan). 



l> — Dermalia, exclusively or i)redominantly stanractins. 



'•'•—Discohexaster rather large (80-120 a dia.) and strong-rayed ; spherical. No hexactins 



among the parenchymalia C. tumida F. E. Sen. (Banda Is). 



f/^— Discohexaster small (up to -lO u. dia) and delicate. 



d^— Sponge-body witli tortuous exterior, the depressions leading into intercommuni- 

 cating intercanals. Xo hexactins among the parenchymalia. Discohexasters all 



spherical C. cornujata Ij. (Sagami Sea). 



«■• — Sponge-body with smooth exterior; without intercanals. Medium-sized hexactins 

 present among the parenchymalia. :Most discohexasters with the terminals 



formed into six separate bunches (not si)herieal) 



C. Ihierfdderi F. E. ,^'cu. (Link- Ki Is.). 



CRATEROMORPHA MEYERI J. E. Gray. 



Plate IV., figs. 1-8 and 12. 



CrateromorpJta meyeri. H. J. Carter, '72, ]). 112, — J. E. 

 Gray, '72, p. i:^G.— H. J. Carter, jyi.—R. J. Carter, '73^, 

 p. 861.— H. J. Carter, '75, p. 199.— W. Marshall, '76, p. 

 12'"). — F. E. Schulze, '86, p. 52 (reprint).— F. E. Schulze, 

 '87, p. 161, pi. Lxi (!).— F. E. Schulze, '97, p. Ô40.— I. 

 Ijima, '98, p. 48, 



