NO. 1 DURHAM, BARNARD: EASTERN PACIFIC STONY CORALS 79 



Family Caryophylliidae 



Genus BATHYCYATHUS Milne Edwards and Haime 



Bathycyathus Milne Edwards and Haime (1848), Ann. Sci. Nat., sen 

 3, vol. 9, p. 294. 

 Genotype; Bathycyathus chilensis Milne Edwards and Haime. 



Bathycyathus consagensis Durham and Barnard, new species 

 Plate 8, figs. 40a-e, pi. 9, fig. 40f 



Corallum of medium size, scolecoid to slightly ceratoid, coralHtes 

 produced by basal budding; calice moderately deep, circular to suboval 

 in cross-section. 



Description of holotype: Calicular diameter 8 mm; septa in 4 

 cycles, interspaces about as wide as thickness of first cycle septa ; septa 

 of first cycle moderately exsert (2 mm), second cycle half as exsert, 

 third cycle about one-quarter as exsert; exsertness of fourth cycle inter- 

 mediate between that of adjacent cycles; first cycle septa moderately 

 well-rounded above and descending almost vertically into calice, attached 

 to columellar tangle only at depth ; second cycle septa two-thirds as wide 

 as primary septa, third cycle at depth continuous nearly to columella 

 and fusing to included second cycle septa ; higher up, third cycle septum 

 divides with inner half becoming a prominent, somewhat irregular pali- 

 form lobe extending to about as high as top of columella, remaining half 

 of third cycle septum about half the width of first cycle septa; fourth 

 cycle septa very narrow, projecting inwards only a fraction of a milli- 

 meter from the wall ; upper edges of septa microscopically dentate, septal 

 faces with a moderate number of very fine granules ; costae unequal, 

 corresponding to septa, moderately well-rounded and granulated at top 

 of corallum and disappearing towards base; costal interspaces about 

 equal in size to costae ; columella composed of a few irregular, contorted 

 processes with some of the third cycle paliform lobes merging with it. 



Descriptions of other specimens: From two localities in the same 

 general vicinity as the type. The amount of variation in these specimens 

 is such, that if they were from widely separated geographical areas, some 

 of them undoubtedly would be described as new species. 



Sta. 1062-40 (one adult and 2 immature specimens). Calicular 

 diameter of adult 8 mm. The adult specimen has the first cycle septa 

 extremely exsert (3 mm), and the columella is deep (5 mm) within the 

 calice. It has one very abnormal second cycle septum which is much 

 wider than the typical first cycle septa and has 3 small, short paliform 



