246 



GEODIA BERRYI. 



Large oxysphaer asters: from sixteen to twenty-two conical, spined rays, 1-1.6 /i 

 thick ; centrum 4-6 ji, whole aster 14-20 /z, in diameter. Small strongylosphaer- 

 asters: from eight to fifteen truncate, spined rays, 0.6-1.3 /jl thick; centrum 

 2-3 /(, whole aster 6-9.2 p., in diameter. Sterrasters: 72-82 by 65-74 by 55-62 pt. 

 Eastern Pacific. Galapagos ; Duncan Island. 



Geodia berryi (Sollas). 



Thiele, Abhandl. Senckenb. gesellsch., 1900, 25, p. 43. 



Cydonium berryi Sollas, Rept. voy. "Challenger," 1888, 25, p. 256. 



Geodia cydonium var. cerryi ! Lindgren, Zool. anz., 1897, 20, p. 486. Zool. jahrb. Syst., 1898, 11, p. 341, 

 plate 18, figs. 9, 20, plate 20, fig. 4a-k, b', c', f. 



Small spherical, gray or brown. 



Large choanosomal omphioxes: 2.16-2.54 mm. by 24-26 p.. Minute dermal 

 amphioxes: 240-310 by 8-10 p. Orthoplagiotriaenes: rhabdome 2.15-3.15 

 mm. by 51.6-72 p; clades 175-240 /1 long. Protriaenes (probably mesopro- 

 triaenes) : rhabdome 2.54-4.5 mm. by 12.9 p at cladome, and 23-28 p at thickest 

 point near the middle. Large anatriaenes: rhabdome 4 mm. by 25.8 p (Sollas, 

 1888, error 258 p)-32 p; clades 84 p long; cladome 100-112 p broad, 65-72 p 

 high. Minute dermal anatriaenes: rhabdome 480 by 2-4 p; clades 6-8 p long; 

 cladome 9.5-12 p broad, 6-8 p high. 



Large choanosomal asters: according to Sollas, 1888, chiasters 12-15 p in 

 diameter; according to Lindgren, 1898, oxyasters with from eight to fifteen rays, 

 16-20 p in total diameter. Oxysphaerasters : rays numerous; total diameter 

 12-15 p. Small strongylasters (chiasters): from six to twenty rays; total diame- 

 ter 8 //. Sterrasters: 71-80 by 65-68 p. 



Formerly I was inclined ^ to consider G. berryi as a synonym of G. mulleri 

 (cydonium), and, although there can be no doubt that these forms are very simi- 

 lar, the experience I have recently gained with specimens from the Pacific 

 has made me doubtful as to their identity, so that now, like Thiele, I think it 

 better to retain G. berryi as a distinct species. 



The species G. mulleri (cydonium) in the wider sense given to it by me in 

 1894 and 1903 being thus split up, I am unable to say to what part of it the 

 East Australian sponge mentioned by me under this name,^ and of which no 

 material for examination is at my disposal, should be assigned. Therefore 

 I cannot take this sponge into consideration. 



' R. V. Lendenfeld. Die tetractinelliden der Adria. Denk. Akad. wissensch. Wien, 1894, 61, p. 138. 

 Tetraxonia. Ticrreich, 1903, 19, p. 113. 



^ R. V. Lendenfeld. Die tetractinelliden der Adria. Denk. Akad. wissensch. Wien. 1894, 61, p. 146. 



