90 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 16 



Several immature specimens of Cyathoceras come from Bottom 

 samples 406 and 446 in the Galapagos Islands, 54-56 fms; their costal 

 interspaces are somewhat flat-bottomed and they may belong to the 

 presently described species. 



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



Holotype: AHF no. 17, with one paratype. 



Type locality: Sta. 816-38, north of Hood Island, 50-100 fms. 



Material examined: Stas. 190-34 (1), 816-38 (2). Bottom samples 

 450 (4). Cat. nos. 51.1-51.3. 



Distribution: The Galapagos Islands, 50-100 fms. 



Genus LOPHOSMILIA Milne Edwards and Haime 



Lophosmilia Milne Edwards and Haime (1848), Comptes Rendus 

 Acad. Sci. Paris, vol. 27, p. 467. 

 Genotype: Caryophyllia cenomana Michelin. 



Lophosmilia wellsi Durham and Barnard, new species 



Plate 12, fig. 52 



Type a group of slightly worn corallites. Individual corallites elon- 

 gate-conical, resembling Lophosmilia fusca (Vaughan), up to 12 mm in 

 length; calices subcircular to oval, deep, septa in 4 cycles, interspaces 

 half as wide as thickness of primary septa; primary septa extend to 

 columella which is sublamellar and formed by the separation of the 

 inner edge of one of the septa ; second cycle septa less than half as wide 

 as first cycle; third cycle septa project only slightly from the wall and 

 the fourth cycle septa are lines of faint trabeculae ; first cycle septa very 

 exsert (1 mm), later cycles successively less exsert; primary septa well- 

 rounded above, descending almost vertically to columella ; inner edges of 

 septa smooth; septal faces with moderately small granules; costae cor- 

 responding to first 3 cycles of septa, well-developed near top of calice. 

 Interior of calice cut by several tabular dissepiments separating the older 

 and newer parts of the corallite. The outer surface of the corallum is 

 shiny and appears to have some stereomal deposit. 



Remarks: This species may be separated from L. fusca (Vaughan) 

 by the lesser development of the septa. 



Wells indicates the synonymy of and discusses this rare genus (Bull. 

 Am. Paleo., vol. 26, no. 98, pp. 313-314, 1941). 



Dimensions of corallite: Height 12 mm, calice 3.5 by 4,5 mm, 

 depth of calice 3.5 mm. 



