244 GEODLA. OVIS. 



Northeastern Pacific. West coast of North America; off southern Cali- 

 fornia. "Albatross" Station 2894: Vancouver Island, Strait of Georgia, near 

 C(jmox. 



Geodia ovis Lendenfeld. 

 Ante, p. Ifil. 



Cake shapeil, liorizontally extended. With exceedingly high spicule-fur. 

 In s])irit : light brown. 



Large choanosomal amphioxes: 4-9 mm. by 30-40 fi. Large styles and 

 <i/Zos^?/fcs: of two kinds, stout and slender; the stout; mostly style; 2.6 4 mm. by 

 85-11 G /<; the slender: always tylostyle; long; about 40 /« thick; tyle 60-65 /t 

 in diameter. Minute dermal rhabds: mostly amphiox, rarely style; 270-550 

 by 8-13 fi. Orthotriaenes (and plagiotriaenes): rhabdome 5-8 mm. by 74-100 /n 

 at the cladome, 77-110 /( a little farther down; clades concave to rhabdome 

 throughout or only basally, and straight distally, 310^640 p. long; clade-angles 

 86-101°. Irregular megascleres: rare. Mesoproclades and proclades: rhabdome 

 6-17 mm. by 20-41 p. at the cladome, near the middle from two to three times as 

 thick; in the normally developed mesoprotriaenes the clades 140-170 p long, the 

 clade-angles about 45°, the epirhabd 110 ju long; in the irregular mesoproclades 

 (proclades) clades very unequal, the longest up to 260 p long, sometimes one or 

 two clades or the epirhabd suppressed. Anadades: nearly all triaene; very 

 unequal in size; small and large ones distinguishable; the stnall: rhabdome 

 670 p-2.5 mm. by 2-7 //; clades 6-43 ju long; clade-angles 41-65°; the large: 

 rhabdome up to 23 mm. long by 17-45 p; clades 70-205 p long; clade-angles 

 36-55°. 



Large thin-rayed oxyasters: from three to ten conical, distally spined rays, 

 1-3.2 p thick; no centrum; total diameter 20-34.5 p. Large thick-rayed oxy- 

 asters: from four to nineteen conical, simple or partly bifurcate rays with large 

 spines in their niiddle parts, 3-6.3 p thick; total diameter 28-45 p; the man}'- 

 rayed appear sphaerastrose. Small thick-rayed asters: from six to fifteen trun- 

 cate or blunt-pointed, distally spined rays, 1-3.2 p thick; centrum absent or 

 present and then up to Q pin diameter; whole aster 11-24 p in diameter. Sterr- 

 asters: 82-92 by 70-83 by 54-61 p. Sterroids: rare; of similar dimensions, but 

 with much thicker rays. 



Northeastern Pacific. West coa.st of North America; 34°1'30"N. "Al- 

 batross" Station 2975. 



