GEODIA EXIGUA. 



251 



Large oxyasters: from four to eleven conical or cylindrical, pointed or trun- 

 cate, spined rays, 1-3.5 ;t thick; total diameter 20-45 (Sollas, 1888, 26 /<). 

 Large oxysphaer asters: connected by transitions with the oxyasters; from fifteen 

 to twenty conical rays; 0.8-1.7 jx thick with spine- verticils near their ends; cen- 

 trum 3-4.5 (1, whole aster 9-18 pi, in diameter (not mentioned by Sollas, 1888). 

 Small sphaerasters : regular, or rarely irregular, ataxastrose; from six to eighteen, 

 cylindrical or cylindroconical, truncate or blunt-pointed, spined rays, 0.8-2 /.i 

 thick; centrum 2-5, whole aster 4.6-8 fi, in diameter. Sterrasters: 84-110 by 

 73 94 by 60-74 jj.. 



Eastern Pacific. Gulf of Panama: Mexico (probably Pacific coast). 



Geodia magellani (Sollas). 



Lendenfeld, Tierreich, 1903, 19, p. 107. Thiele, Zool. jahrb. Suppl., 1905, 6, p. 408. 

 Cijdonium magellani Sollas, Proc. Roy. Dublin soc, 1886, 5, p. 197. Rept. voy. "Challenger," 1888, 

 25, p. 221, plate 21, figs. 1-14. 



In spirit: brownish white. 



Amphioxes: 3.927-5.71 mm. by 51.6-58 /(. Dichotriaenes: rhabdome 

 3.927-4.82 mm. by 64-90 /jl; main clades 127 fi, end clades 275 /( long. Aiia- 

 triaenes: rhabdome rounded terminally, 7.14-7.5 mm. by 19 23.7 /x; clades 

 110-116 n long; cladome 160-175 fx broad and 103-119 /( high. 



Choanosomal oxyasters: total diameter 16 ft. Subcortical oxy sphaerasters: 

 rays spined; centrum 8 /i, whole aster 21.7 f.i, in diameter. Small sphaerasters: 

 rays cylindroconical, truncate; centrum large; total diameter 12 /(. Sterrasters: 

 spheroidal 123 by 103 /i. 



Southeastern Pacific. Chile ; Calbuco : Patagonia; Tom Bay, 50° 8' 30'' S., 

 74° 41' W. ; Port Churmca, 52° 45' 30" S., 73° 46' W. 



Geodia exigua Thiele. 

 Zoologica, 1898, 24, p. 1 1 , plate 6, fig. 8a-h. Lendenfeld, Tierreich, 1903, 19, p. 1 1.5. 



Small, cyUndrical. Dry: whitish. 



Amphioxes 1 mm. by 11 /«. Orfhoplagiotriaenes: rhabdome 1-1.2 mm. by 

 15 /jl; clades 100 long. Anatriaenes: rhabdome long and slender; clades 

 30-40 fjL long. 



Lai'ge sphaerasters: rays cylindroconical, blunt pointed; centrum well de- 

 veloped; total diameter 18 /i. Large strongylasters: rare; total diameter 12 

 {1. Small strongylasters : total diameter 6 jx. Sterrasters : 58 by 52 ft. 



Northwestern Pacific. Amami-Oshima : Liu-Kiu Islands. 



