132 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 17 



Additional material : California — D. 5497, 5456, Cherry Cove, 

 Santa Catalina Island, Oct.; D. 5711, Catalina Harbor, Santa Catalina 

 Island, Dec. Pacific Baja Calif. — D. 8902, upper littoral tide pools 

 (above Pelvetia zone) Punta Baja, Jan.; D. 8394, south tip of Isia 

 Guadalupe, Dec; D. 10035, 10485, 11-17 miles west of Punta Malar- 

 rimo, Bahia Vizcaino, April, Oct. 



These plants are easily distinguished by their dense, tufted habit 

 and the polystichous or whorled, short, often spine-like branchlets. They 

 appear to be favored by warm water conditions. The single collection 

 from an upwelling area (Punta Baja) came from upper tide pools sub- 

 ject to warming by insolation. 



The corniculate character of the conceptacles appears to be variable 

 in this species. In the type, the conceptacles are almost all non-anten- 

 niferous, whereas one of the Santa Catalina Island collections shows a 

 small majority of antenniferous conceptacles. 



Gorallina oflBcinalis var. chilensis (Harvey) Kiitzing 



Plate 28, fig. 1 



Kiitzing, 1845-71, vol. 8, p. 32, pi. 66, fig. 1 ; Yendo, 1902, p. 718, 

 pi. 54, fig. 1, pi. 56, fig. 15. Corallina chilensis Decaisne ex Harvey, 

 1847, p. 103; Smith, 1944, p. 230, pi. 51, fig. 4; Taylor, 1945, p. 200, 

 pi. 62; Dawson 1945b, p. 65; Doty, 1947, p. 167. Corallina officinalis 

 f. robusta Setchell & Gardner, 1903, p. 365. 



Thalli saxicolous, 5-13 cm. high, consisting of several erect, loosely 

 branched axes from the basal crustose stratum; branching normally 

 strictly distichous, opposite-pinnate, of 1-3 orders, densest in upper parts, 

 the lower portions of main axes usually nude from erosive falling away 

 of older pinnules and branchlets; intergenicula cylindrical at the base, 

 compressed to flattened above and cuneate, those of ultimate branchlets 

 tending to have acute upper margins, mostly 1.5-1.7 mm. long and 1.1- 

 1.3 mm. broad (at broader distal end) throughout main axes, narrower 

 but about the same length or a little shorter in branches of higher order ; 

 ultimate pinnules lanceolate to linear lanceolate, acute; conceptacles 

 ovoid, 500-600 yu in diameter, non-antenniferous, terminal on ultimate 

 pinnules and appearing pedicellate, sometimes, if bearing segment is 

 quite flat, with a wing-margin around the conceptacle. 



Type: Holotype is Darwin 2151 in the Harvey Herbarium, 

 Trinity College, Dublin, Ireland. 



Type locality: Valparaiso, Chile. 



