ON THE SOLITARY CORALS, COLLECTED BY DR A. WILLEY. 167 



The coral, however, can be at once distinguished from all previously described 

 species by the characters of its primary septa. Owing apparently to the irregularity 

 of the calice the paliform lobe is absent from two of the primary septa, and a third 

 primary is distinctly bilobed towards the exterior. There is no sign of any epitheca, 

 the junction of the formerly living extrathecal tissues and dead parts, however, being 

 marked by a distinct thin pellicle, the edge of the advancing nullipore. 



Genus. Antillia, Duncan. 



9. Antillia sinuata, n. sp. (Fig. 26.) 



The corallum is widely open, trumpet shaped, somewhat bent and twisted. It is 

 attenuate below, being drawn out gradually into a pedicle which in the specimen is 

 bent sharply to one side. The pedicle is slightly compressed in a plane at right 

 angles to its bend, but the calice above is more or less round with the edges rather 

 sinuous. 



The epitheca is very thin and transversely lined with the costae in places showing 

 through ; it is distant about 1 mm. from the true theca and extends up to about 

 3 mm. from its edge, above which the septa are 2 — 3 mm. exsert. 



The septa are 102 in number, of which about half fuse with the columella, which 

 closes in the oval axial fossa — 8 mm. by 5 mm. — with a mass of twisted, tangled and 

 anastomosing processes. The systems and cycles are not readily distinguished, as about 

 the first 24 septa are almost equal in size ; each of these generally possesses a paliform 

 lobe, rising abruptly to a height of 2 mm. above the septal edge, then running hori- 

 zontal]}' inwards for 3 — "> mm. and sloping steeply down to the columella, which is 

 situated about 4 mm below its upper edge. The septa of the fourth and fifth cycles are 

 very irregular in length, and often ait- fused with the septa of preceding cycles, where 

 the edge of the calice is depressed. The septa of the different cycles are nearly equally 

 exsert and extend down to the epitheca as costae, which project for about 1 mm. from 

 the theca. The edges of the septa are covered by low pointed teeth about 0o mm. apart 

 and corresponding to these on the sides of the septa are a number of ridges. 



Extreme height of the single specimen, 2'7 cm. Diameter of the calice, 3"5 — 3'9 cm. 

 Diameter of the pedicle where broken, 3 mm. 



Loc. Talili Bay, New Britain ; 35 fathoms. 



The specimen on which this species is founded has been broken off close to its 

 attached base; in the fractured surface 12 septa and a broad columella are visible. Both 

 exotheca and endotheca are scanty. The epitheca is attached to the corallum chiefly by- 

 means of the costal edges, and near the base has been much worn away by algal and 

 worm growths. 



The species is in its characters to some extent intermediate between Antillia ex- 

 I Janata (Pourtales) from Barbadoes and Antillia cunstricta (Briiggemann) from Borneo. 



