MADEEPOEAEIA OP THE DEEP SEA. 317 



The septa are stout, unequal, and crowded;, none are exsert; but they are rather 

 wavy. The primary are not readily distinguishable from the secondary septa ; but these 

 are longer than the tertiaiy. There are six systems of septa, and three cycles in each. 



The columella is formed by one twisted process. 



The pali are small, and are placed before the secondary septa. 



Height of corallum -j% inch ; breadth of calice -^ inch. 



Dredged up No. 17 a dredging, 2nd expedition of the ' Porcupine.' 



1/ Caeyophtllia pouetalesi, Duncan. (Plate XLII. figs. 3-10.) 



The corallum is subturbinate, curved, and swollen. 



The calicular margin is circular ; and the base, which is truncated, is marked by the 

 results of displacement fi'om the foreign body to which it was attached by a very small 

 peduncle. 



The costae are flat, broad, equal, and terminate at the calice in angular points, which 

 are much broader than the septa. 



The epitheca is shining, and gives the chevron and granulated ornamentation to the 

 costae. 



The calicular fossa is shallow. The columella is very small, and is formed by one or 

 two twisted processes. The pali are irregular and tall. 



The septa are unequal, not exsert, are wavy, very granular laterally, and delicate; 

 they are wide apart, and are in six systems. There are three cycles of septa in each 

 system, and some members of the fourth in some systems. 



Height of corallum yo inch ; breadth of calice 2^ inch. 



There are some young specimens, which prove that the septal number is reached very 

 early, and that the epitheca covers the costae and intercostal spaces at first, and does not 

 permit them to be seen (figs. 4-7). 



Dredged up in the second expedition of the ' Porcupine,' in stations 24 and 29. 



American Caryophyllice. 



M. de Pourtales describes Caryophyllia cormiformis, Pourt., which he obtained in 

 237 and 248 fathoms, off Sand Bay and the Samboes, Florida, on a bottom consisting of 

 Foraminifera. It has four cycles ; but the pali are before the secondary septa. This 

 anomaly separates the species from all others. Otherwise it belongs to the Arcuata 

 type. 



Caryophyllia formosa, Pourt., was found by the same excellent naturalist off Havana, 

 in 270 fathoms. It is closely allied to Caryophyllia arcuata, Ed. & H. 



Caryophyllia herteriana, Duchassaing, Anim. Rad. des Antilles, a form with four 

 incomplete cycles of septa and large costse, is found off Guadeloupe, and perhaps in 

 68 fathoms off the Tortugas [Pourtales). 



