278 Transactions 



Leptoria tenuis (Dana). 



1846. Meandrina tenuis Dana, U.S. Expl. Exped., Zooph., p. 262, 

 pi. 14, figs. 7, la-Id. • 



This species is discussed and the type is refigured in my paper on the 

 shoal-water corals from Murray Island, &c. 



Localities. — Kermadec Islands: Napier Islet; included in lava-flow; 

 altitude, 200 ft. : Dayrell Islet ; volcanic submarine beds. 



Sclerophyllia margariticola Klunzinger. 



1879. Sclerophyllia margariticola Klunzinger, Korallenth. Roth. Meet., 



pt, 3, p. 4, pi. 1, fig. 12. 

 1907. Sclerophyllia margariticola Vaughan', Proc. U.S. Nat. Mus., 



vol. 32, p. 258. 



Locality. — Kermadec Islands : Dayrell Islet ; volcanic submarine beds 

 (two specimens). 



Turbinaria crater (Pallas). 



1896. Turbinaria crater Bernard, Cat. Genus Turbinaria, p. 23, pi. 1 ; 

 pi. 31, fig. 1. 



Corallum represented by a peripheral fragment ; apparently crateriform 

 when entire. Radial length of fragment, 34 mm. ; thickness at inner, broken 

 edge, 4*5 mm. ; thickness at peripheral edge, 2 mm. ; margin rounded. 

 Corallites unifacial, confined to upper surface ; about their diameters 

 apart ; inclined outward ; length of upper wall up to 3-5 mm. ; lower edge 

 of calice elevated up to 1-5 mm. above the coenenchyma ; at the periphery 

 the lower edge is immersed ; upper edge of calice up to between 3 mm. 

 and 3-5 mm. above the coenenchyma. Basal diameter of corallites up to 

 3*25 mm. measured along a tangential line ; calicular diameter along 

 tangential line up to 2-5 mm., in a radial plane up to 3 mm. Walls rather 

 dense ; externally granulate, without definite costules. Calicular apertures 

 up to about 1-5 mm. by 2-25 mm. in diameter, somewhat compressed 

 radially, and directed outward. Twelve septa extend to the columella ; 

 there may be from 2 to 6 tertiary septa, which are usually introduced 

 in the interseptal loculi next beyond those on the sides of the directive 

 septum at the proximal end of the calice. In other words, septa of the 

 tertiary cycles are added bilaterally, and usually at one end of the plane 

 of symmetry. The columella fossa in a radial plane is about half the 

 diameter of the calicular aperture ; in a tangential plane about one-third 

 the calicular diameter; and is relatively deep, up to about 1-5 mm. The 

 columella is lamellate, lying along the directive plane, the septa joining it 

 by radial processes. There is often a distinct ring of synapticulae outside 

 the columella. The coenenchyma is relatively dense. There are almost 

 solid lower layers supported by trabecular pillars or short spines ; above 

 this is a layer in which new corallites have formed ; and above the more 

 spongy zone another compact layer, which forms the upper surface. The 

 coenenchymal surfaces, both lower and upper, are granulate, rather flaky, 

 and indefinitely costulate. 



Locality. — Kermadec Islands ; probably from Denham Bay, Sunday 

 Island, at a depth of 3 fathoms. 



Remarks.- — This coral differs from Bernard's description of T. crater by 

 having relatively deep calices, whereas the latter is said to have a shallow 

 fossa. Otherwise there seems to be no difference of importance. 



