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ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 12 



6. Peripheral utricles short, two diameters long or less, mostly 90- 



120/idiam C. santamariae 



6. Peripheral utricles longer, three diameters long or more, mostly 

 over 120 fx diam C. dichotomum 



7. Branch segments somewhat cuneate, a little compressed at the 

 forks; gametangia 65 /i diam. or less C. cervicorne 



7. Branch segments cylindrical, without any compression; game- 

 tangia 5 ft diam. or more when mature C. isabelae 



Godium Setchellii Gardner, prox. 



Plants forming quite thin, to moderately thick strata, the peripheral 



utricles with rounded ends, 60-90 /x diam., the membrane about 5 ju, thick. 



Gardner 1919, p. 489, pi. 42, figs. 10, 11; Smith 1944, p. 75, pi. 9, 



fig. 4. 



These plants formed much thinner layers than those described by 

 Gardner, except no. 34-379, which reached his lower limit, and the ves- 

 icles ranged more widely in size, the maximum being greater than he 

 described, and the end walls thinner. The Jicarita material was little more 

 than a thin weft of filaments supporting a layer of vertical utricles. No 

 fertile material was available, but no other allocation of the material 

 appears more suitable. 



Panama: rare, spreading in thin crusts over rocks, I. Jicarita, no. 

 34-508, 21 Feb. 1934. Ecuador: Archipielago de Colon, on corals at 

 5.4 meters, I. Pinta, Schmitt no. 46A-33, 2 Feb. 1933. Ibid., adhering 

 to rocks about Black Beach Anchorage, I. Santa Maria, no. 34-242, 19 

 Jan. 1934. Ibid., rare as dredged off Post Office Bay from 12-18 meters, 

 no. 39-361, 27 Jan. 1934. Ibid., dredged attached to shells from 60 

 meters' depth, no. 39-379 C, 29 Jan. 1934. 



Godium dichotomum (Hudson) S.F.Gray 



Papenfuss 1944, p. 338; Setchell 1931, p. 361 ; Taylor 1942, p. 37. 



This is the plant which has gone under the name C. tomentosum in 

 the past. 



Mexico: Baja California, intertidal at Point Hughes near Cabo 

 San Lazaro, no. 34-594, 7 Mar. 1934. Ecuador: Archipielago de 

 Colon, dredged from 27 meters off Post Office Bay, I. Santa Maria, no. 

 34-273, 19 Jan. 1934. 



