80 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 16 



lobes on its inner edge; this abnormality is apparently caused by some 

 parasitic or commensal organism within the calice, with the organism 

 having been sealed off by a thin, calcareous partition. The costal inter- 

 spaces of this specimen are flat-bottomed. 



Sta. 1067-40 (2 adult and 2 immature prepared specimens and one 

 adult specimen in alcohol with polyp). One of the adult prepared speci- 

 mens is quite similar to the holotype, except that the first cycle septa are 

 only 1.5 mm exsert, and one or two of the second cycle septa have a 

 paliform lobe before them (this specimen also has a parasitic or com- 

 mensal organism which is walled oflE by a thin calcareous deposit). The 

 other adult prepared specimen from this locality has none of the septa 

 exsert; the first and second cycle septa are of approximately the same 

 size and descend obliquely from the top of the calice towards the bottom 

 of the fossa. The fourth cycle of septa is incomplete, the third cycle septa 

 with well-developed paliform lobes; columella fascicular but confused 

 with the paliform lobes. This last specimen, if found by itself certainly 

 would have been described as a new species, but it occurs in association 

 with specimens which are almost typical and is from almost the same 

 spot as the holotype. 



Station 1965-50 (several specimens similar to the holotype and one 

 aggregated specimen), ofiE Entrada Point, Magdalena Bay, Lower Cali- 

 fornia, 28-34 fms. The largest specimen (Plate 9, fig. 40) consists of a 

 number of corallites, the largest of which is 10 mm in diameter; the 

 corallites are connected with one another by a dense, smooth coenenchy- 

 ma, above which the corallites may project 1-6 mm. 



Remarks: This species may be distinguished from Bathycyathus 

 chilensis Milne Edwards and Haime and B. indicus Milne Edwards 

 and Haime, by having only 4 cycles of septa, and by the projection of 

 the pali above the columella in the latter two species. It is separated 

 from B. maculatus Pourtales by the lesser number of septa and the more 

 contorted columellar pieces. 



Dimensions of holotype: Height 7 mm, calice 7 by 8 mm, depth of 

 calice 2.5 mm. 



Holotype: AHF no. 12, with 3 paratypes. 



Type locality: Sta. 719-37, off Consag Rock, Gulf of California, 

 10-25 fms. 



Material examined: Stas. 719-37 (6), 1062-40 (3), 1067-40 (5), 

 1965-50 (3). Cat. nos. 40.1-40.4. 



Distribution: The type locality and off Willard Island, Gonzaga 

 Bay, Gulf of California, 10-45 fms. Off Entrada Point, Magdalena 

 Bay, Lower California, 28-34 fms. 



