26 STYLOPHORlDyE. 



Lophohelia exigua PoriiT. 

 Plate I., figs. C and 7. 



Corallum l)rancliiiii;' ; the corallites alternate, forming angles of 

 70^-75" with their predecessors, pr()))ortionall3- shorter and more 

 open than in L. pniJifcni. Wall smooth or very finely graiudated. 

 Costa; sharp and prominent, hut not extending far downward. Cal- 

 icle circular, Avell opened, very deep. Septa thin, slightly e.xsert. in 

 six systems and four cycles, the last almost rudimentary. 



Height, 3 to 4 cm.; height of single corallites, 4 to 5 una.; diam- 

 eter of calicle, 4 to G mm. 



oil' Tortugas,'in 36 ami 79 fathoms. 



Oil' Pacific Keel" in iS: fathoms (dead Iraixnit-nts). 



The fraunient from the last locality is doiihti'ul, heinu' much worn. 



Lophohelia Carolina Poi ut. 



Corallum Ijranching. with snuioth and very faintly striated ca'nen- 

 chyma. dense and heavy. Caliclcs regularly altcrnale, costa^ dis- 

 tinct on the l)or(l(M' of the calicles only. Caliclcs prominent, not 

 very deep; se|)ta with entire border, not ex.sert. Six complete 

 systems, three unequal cycles, the first nearly meeting in th'e centre ; 

 no columella. The lu-anch from which tliis description is taken is 18 

 cm. long, 8 nun. in dianu'ter in the thickest part, calicles 4 nnn. 



This species is named according to the desire of Mr. R. Arango 

 of Havana, who sent it to the Museum. The depth from Avhich 

 it was ohtaiiu'd is not stated, but it came probably from a fisher- 

 man's liiu' or net. as many other interesting specimens in that gen- 

 tlenunrs collection. 



Family STYLOPHORID^E Pourt. 



SUjIophtr'niiv M -ICdw. S; H., I8:j7. 



PscudnciiliiifE M.-IOdw & II. .\nn. So. Nat , .'id Sen., Vof XIII., IS.^0. 



This group -was placed l)y Milne-Edwards and Ihiime at the end 

 of the Oculinidas as a subfamily intermediate between the Ocu- 

 linida> and the Astra^thv. more lU'nrlv allied to the former than to 



