96 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 16 



Family Flabellidae 



Genus FLABELLUM Lesson 



Flabellum Lesson (1831), Illust. ZooL, pi. 14. 

 Genotype: Flabellum pavoninum Lesson. 



Flabellum daphnense Durham and Barnard, new species 



Plate 13, figs. 58a, b 



Corallum conical, base narrowing to a small broken pedicle; calice 

 elongate-oval, ratio of long to short axis 23-16; apical angle 55°; cali- 

 cular fossa deep (5 mm), wall thin, outer surface with broad, low 

 pseudo-costae 2-3 septa wide, pseudocostal interspaces of same width; 

 outer surface of corallum finely and evenly granulated, granules very 

 close together, small, low, and rounded, lending a cobbled appearance; 

 septa in 4 cycles, interspaces 3-4 times as wide as thickness of first cycle 

 septa; primary and secondary septa mostly broken, apparently equally 

 exsert (2 mm), tertiaries and quaternaries successively less exsert; septa 

 well-rounded above, inner edges vertical and undulate, margins smooth, 

 tops of septa slightly crinkled ; primary and secondary septa reach to 

 deep columella which merely consists of fused trabecular processes be- 

 tween the inner ends of the first and second cycle septa; tertiary septa 

 extend two-thirds and the quarternary septa one-fourth the distance to 

 the columella; septal faces moderately covered with large, rounded 

 granules. 



Remarks: The tops of all but 4 of the principal septa have been 

 broken off of this fragile specimen. It is similar to Flabellum patagoni- 

 chum Moseley, but does not have the transverse wavy accretion lines on 

 the epitheca, the angle between the sides of the corallum is considerably 

 less, and the septal granules are much more prominent than in F. pata- 

 gonichum. 



Dimensions of holotype: Height 18 mm, calice 8 by 12 mm, fos- 

 sula 1.5 mm wide, 5 mm long, 5 mm deep. 



Holotype: AHF no. 21. 



Type locality: Sta. 788-38, Southeast of Daphne Major Island, 

 55 fms. 



Alaterial examined: The type. 



