240 GEODIA MESOTRIAENA VAR. MICROANA. 



centrum 3-10 [i, whole aster 19-32 [x, in diameter. Small strongylos'phaer asters : 

 from six to twenty distally spined rays, 0.5-2.5 /x thick; centrum 2-6, whole 

 asters 6-14.5 /(, in diameter. Large strongylosphaer asters: transitional to sterr- 

 oids; rare; 16-33 /t in diameter. Sterroids: rare; observed only in var. 

 megana, numerous rays 4-6 // thick, with spined terminal face; 39-58 fi in total 

 diameter. Sterrasters: 92-125 by 78-107 by 67-82 



Northeastern Pacific. West coast of North America; from 33° 38' 45" 

 to 34° 22' N. "Albatross" Stations 2909, 2942, 2958. 



Geodia mesotriaena var. pachana Lendenfeld. 

 Ante, p. 96. 



Large amphioxes up to 105 /j. thick. Among the minute dermal rhabds 

 styles are numerous. Average angle of orthoplagiotriaene-clades 99.4°. 

 Rhabdome of mesoprotriaenes and anatriaenes up to 40 /i thick. Anatriaene- 

 clades thick and short, up to 170 ft long. Oxyasters up to 37 n in diameter. 

 True sterroids absent. Average proportion of length to breadth of sterrasters 

 100:91. 



Northeastern Pacific. West coast of North America; 34° 22' N. "Alba- 

 tross" Station 2909. 



Geodia mesotriaena var. megana Lendenfeld. 

 Ante, p. 96. 



Large amphioxes up to 105 n thick. Styles among the minute dermal 

 rhabds rare. Average angles of orthoplagiotriaene-clades 91.9°. Mesopro- 

 triaene-rhabdomes up to 40 n, anatriaene-rhabdomes up to 38 ft thick. Ana- 

 triacne-clades thick and up to 270 /j. long. Oxyasters up to 54 /x in diameter. 

 Sterroids in small numbers present, 39-58 [x in diameter. Average propor- 

 tion of length to breadth of sterrasters 100 : 90. 



Northeastern Pacific. West coast of North America; 34° 4' N. "Alba- 

 tross" Station 2958. 



Geodia mesotriaena var. microana Lendenfeld. 

 Ante, p. 96. 



Large amphioxes up to 77 //thick. Styles among the minute dermal rhabds 

 rare. Average orthoplagiotriaene clade-angle 104.2°. Mesoprotriaene-rhabd- 

 omes up to 25 fx thick. Anatriaene-clades thin and short, up to 175 fi long. 

 Large oxyasters up to 42 // in diameter. True sterroids absent. Average pro- 

 portion of length to breadth of sterrasters 100 : 79. 



