Indian Deep-sea Dredging. 7 



crown of very large twisted pali opposite the tertiary septa, 

 and these, to make room for the pali, are cramped and pressed 

 back, presenting very sinuous, thickened, bilaterally doubled- 

 up margins. 



Columella conspicuous, consisting of several large twisted 

 lamellae. 



Extreme height of corallum "40 inch ; diameters of elliptical 

 calicular orifice '30 by '20 inch. 



A single specimen from off the west coast of the Anda- 

 mans, 240 to 220 fathoms (Station 56). 



The specimen is small and may possibly be immature, but 

 its characters are so well marked that we propose a distinctive 

 name for it. 



Stephanotrochus, Moseley. 



4. Stejahanotrochus nitens, sp. n., Alcock. 



Corallum bowl-shaped, dense and stony throughout, ivory- 

 white. The epithecate base is gently convex, culminating in 

 a central obtuse point ; the side- wall rises with an outward 

 slope of about 35 degrees from the vertical. The primary 

 and secondary costse, which radiate from the central basal 

 point, are salient throughout, coarse and crenulate on the 

 base, sursumversely spinate or serrate on the side- wall of the 

 theca ; the tertiary and quaternary costge show as faint finely 

 granular radial striations, most conspicuous at the junction of 

 base and side-wall, and obsolescent about halfway up the 

 latter. The calicle has a circular margin and a very capacious 

 fossa. There are six systems of septa, with four complete 

 cycles and an incomplete fifth. All the septa are exsert, 

 those of the first two cycles projecting about '17 of an inch 

 and those of all the higher cycles about '05 of an inch above 

 the calicular margin ; and all are of an unpolished smooth- 

 ness, with thin trenchant edges. Within the calicle the 

 coequal primary and secondary septa are conspicuously pre- 

 eminent. They repeat the simple curve of the thecal wall, 

 and near the middle of the fundus of the calicular fossa their 

 ends become depressed, thickened, and tortuous, and enter 

 into loose Interrupted fusion, in which the tertiaries of the 

 systems in which a fifth cycle is developed also join, to form 

 au inconspicuous radiculate columella, from which arise small, 

 erect, subconical, finely granular pinnacles to the number of 

 about ten, excluding the paliform papillae to be next described. 

 Just external to this the edge of each primary septum rises 

 into a low, dentate, paliform process, while the edges of the 



