246 GEODIA BERKYI. 



Large oxijsphaemsters: from sixteen to twenty-two conical, spined rays, 1-1.6 /( 

 thick; centrum 4-6 jt, whole aster 14-20 /t, in diameter. Small drongylosphaer- 

 asters: from eight to fifteen truncate, spined rays, 0.6-1.3/1 thick; centrum 

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

 Eastern Pacific. Galapagos ; Duncan Island. 



Geodia berryi (Sollas). 



Thielr, Abhaniil. .SeTickoiib. gosellsch.. IStOO, 26, p. 4.3. 

 Cydonium berryi Sollas, Kept. voy. "Challenger," 1S88, 26, p. 256. 



Geoditt q/Joniiim var. rerryi ! Lindgren, ZooI. anz., 1897, 20, p. 486. Zool. jalirb. Syst., 1898, 11, p. 311, 

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



Small spherical, gray or brown. 



Large choanosomal amphioxes: 2.16-2.54 mm. by 24-26 fi. Minute dermal 

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

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

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

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

 1888, error 258 /i)-32 n; clades 84 /i long; cladome 100-112 /x broad, 65-72 fi 

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

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



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

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

 16-20 p in total diameter. Oxysphaei'asters: rays numerous; total diameter 

 12-15/1. Small strongylasters (chiasters): from six to twenty rays ; total diame- 

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



Formerly I was inclined ' to consider G. berryi as a synonym of G. miilleri 

 (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. miiUeri (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. Lendcnfeld. Die tetractinelliden der .\dria. Denk. .\kad. wissensch. Wien, 1891, 61, p. 138. 

 Tetra-xonia. Tierrcich, 1903, 19, p. 113. 



' R. V. Lenden/eld. Die tetractinelliden der Adria. Denk. Akad. wissensch. Wien. 1894, 61, p. 146. 



