252 



GEODINELLA ROBUSTA. 



Geodia inconspicua (Bowerbank). 

 Lendenfeld, Tierreich, 1903, 19, p. 116. 



Pachymatisma inconspicua Bowerbank, Proc. Zool. soc. London, 1873, p. 326, plate 31, figs. 1-6. 

 Cydonium inconspicuum, (Bowerbank) Solla.s, Rept. voy. "Challenger," 1888, 25, p. 260. 



Massive. Dry : light fawn. 



Large choanosomal amphioxes: 1.9 mm. by 29 fi. Minute dermal amphioxes: 

 390 pi long. Orthoplogiotriaenes : rhabdome 2 mm. by 33 p. 



Oxyasters: rays slender; centrum small; total diameter 20 p.. Strongylo- 

 sphaerasters : total diameter 6.5 /t. Sterrasters: spheroidal, 64 /( in diameter. 



? Southern Pacific. South Sea. 



GEODINELLA Lendenfeld. 



Without regular triaenes. The tetraxon megascleres are monaene or diaene 

 teloclades with reduced clades, and occur not only in the superficial part of the 

 sponge but also in the interior. 



Two species are known; both occur in the Pacific Ocean. 



Geodinella robusta Lendenfeld. 

 Ante, p. 205. 



Incrusting, cushion shaped or irregularly finger shaped. In spirit : white 

 or brownish white. 



Large choanosomal rhabds: mostly blunt amphioxes, but also amphistron- 

 gyles, styles, amphityles, and tylostyles; 0.37-2.5 mm. by 40-80 p. Plagio- 

 monaenes, occasionally also ortho- and pro-monaenes: rhabdome 1.1-2.1 mm. by 

 26-42 p; clades 30-105 p long; clade-angles 87-135°. Similar diaenes: only 

 in var. carolae. Similar teloclades with reduced clades. 



Oxyasters and oxysphaerasters: from six to twenty simple or, rarely, bifur- 

 cate, distally spined rays, 0.6-4 p thick; centrum, when present, up to 8 

 in diameter; total diameter of aster 9-38 p, size in inverse proportion to ray- 

 number. Strongylosphaerasters: from eleven to twenty-seven distally spined 

 rays, 1-1.7 p thick; centrum 3.5-7 p, whole aster 7-13 p, in diameter, ♦Sterr- 

 asters: 180-237 by 130-200 by 80-130 p. 



Northeastern Pacific. West coast of North America; southern California, 

 33° 58' N. Vancouver Island, Queen Charlotte Sound: S. E. Alaska, Behm 

 Canal, Naha Bay. "Albatross" Stations 2946, 4199, 4228. 



