ON THE SOLITARY CORALS, COLLECTED BY DR A. WILLEY. 165 



of the septa of the fifth cycle. The primaries are the largest and everywhere rise 

 about 1 mm. above the tertiaries and quaternaries, which are about 1 mm. exsert and 

 subequal, while the secondaries are intermediate in their characters. The pali are well 

 developed and elongated in the plane of their septa. Usually they are single before 

 the primaries and secondaries, but rather more elongated before the latter, while 

 before the tertiaries they are often bi- or tri-lobed. The columella is depressed about 

 1 mm. below the pali ; it is oval in shape, about 25 by 1*4 mm., and consists of 

 a number of small, rounded, granular papillae. 



Extreme height of the largest specimen, 10 mm. Long diameter of the calice of 

 same, 9 mm. ; short diameter, 7 mm. 



Loc. Sandal Bay, Lifu ; 40 fathoms. Two specimens. 



The two specimens of this species were obtained evidently from the same haul 

 of the dredge, and are almost of the same size. Both are much overgrown at the 

 base by algae, sponges and foraminifera. The epitheca is exceedingly thin and difficult 

 to distinguish. It, however, seems t ■ . keep pace with the growth of the incrusting 

 organisms, being deposited closely over the theca and costae as the body-wall is 

 withdraw n 



To the same species I also refer a small specimen 4 mm. high by 2'2 mm. in 

 diameter across the calice. The septa are very similar to those of the type, but 

 quinaries are absent and the quaternaries are only represented by two or three, septa. 

 The primaries and secondaries alone have pali, which are single lobed and rather more 

 elongated in front of the secondaries. The columella is represented by a single median 

 papilla. 



6. Paracyathus parvulus, n. sp. (Fig. 4.) 



The coraUum tends to be somewhat elongated and is more or less of equal 

 diameter throughout. The outside is marked by very distinct, broad, subequal, granular, 

 ridge-like costae with narrow, deep furrows between. The epitheca is very thin, but 

 closely deposited round the costae and extending up to 3 — 5 mm. below the calice. 



The calice is oval with a deep axial fossa. The septa are broad, granular, slightly 

 exsert and much crowded with small interseptal spaces. Four cycles in six systems 

 are present, of which three are complete, but the fourth is not represented in any of 

 the systems by more than two septa on opposite sides of one of the tertiaries. The 

 primaries are about 075 mm. exsert and project for about 1 mm. into the calice. The 

 septa of each cycle are slightly more exsert and broader than those of the cycle 

 next below them, but where quaternaries are developed the tertiaries are enlarged and 

 approximate in size to the secondaries. Rounded pali are present before the primary, 

 secondary and some of the tertiary septa, where quaternaries are present; before the 

 secondaries they are distinctly larger than before the primaries and in front of the 

 tertiaries are sometimes bilobed. The columella is situated rather deeper and ends 

 above with 8 — 12 very small rounded papillae. 



Height of the largest specimen, 16 mm. Long diameter of the calice of same, 

 4 - 5 mm. ; short diameter, 3 mm. 



Loc. Sandal Bav, Lifu ; 40 fathoms. Eleven specimens. 



