4i 



XXVII. Balanophyllia Searles Wood, Edw. & II. Duncan. 



Besides somc dead and indeterminable fragments, three species of this genus are included 

 in the collection. 



Synopsis of the Siboga Deep-sea species oj Balanophyllia. 



I. Corallum fixed, elongate, fistulous, curved or sinuous, cylindrical, not 



increasing in diameter from base to calicle Balanophyllia sp. 



II. Corallum fixed, gradually expanding from base to calicle: 



i. Septa of the first two cycles equal, much larger than those of 



the fourth cycle i. B. cornu. 



il. Septa of the first cycle much the largest, very thick and spongy : 

 the septa of the fourth cycle which adjoin the primaries are 

 much larger than those of the second cycle, which they meet 2. B. parvula. 



64. Balanophyllia sp. 



Stat. 107. 6° i'.5 N., I2I°28'E. 270 m. 1 Ex. 



I am unable to identify this species, and as it is dead and worn I do not care to name 

 it. It is an elongate pipedike form like Balanophyllia (Tliecopsammia) fistula, from which it 

 differs in having a large prominent compact columella made up of twisted lamelle, much like 

 that of Balanophyllia ( Thecopsammia) gemma Moseley. 



65. Balanophyllia cornu Moseley. 



Balanophyllia cornu Moseley. Challenger Deep Sea Madraporaria, p. 192, pi. XII, figs. 11 — 15. 

 Stat. 297. io°39'S., i23°4o'E. 520 m. 1 Ex. 



Though the beautiful specimen which I identify with this graceful species differs from 

 the three individuals described by Moseley in having the septa more exsert, I believe it to be 

 the same. 



Jourdan ( "Hirondelle" Zoanthaires) identifies this species from the N. Atlantic in the 

 neighbourhood of the Azores. The "Challenger" specimens came from off the Kei Islands, and 

 the "Siboga" specimens from the sea south of Timor. 



66. Balanophyllia parvula Moseley. 



Balanophrllia parvula Moseley. Challenger Deep Sea Madreporaria, p. 194, pi. XV, figs. 9, ga. 



Stat. 251. 5°28'.4S., i32°o'.2E. 204 m. 1 Ex. 



The single specimen of this singularly beautiful species has all the well-marked specific 

 characters described by Moseley, and only differs in being taller and more elegantly pedicellate. 

 Dislribution. Celebes Sea, Banda Sea. 



SIBOGA-EXPEDITIE XVI(7. 6. 



QC 



