1893.] A. Alcock — Newly -recorded Corals from the Indian Seas. 139 



Paracyathus, Edw. & Haime. 



3. Paracyathus indicus, Duncan, var. nov. gracilis. Vide Duncan, 

 Journ. Linn. Soc, Zool., vol xxi. 1889, p. 3. 



The type of this species, which was brought by Dr. Anderson from 

 Mergui, is in the Indian Museum, and I have now to record a distinct 

 variety from the Bombay coast. This variety is characterized by its 

 greater delicacy, and by the form of the corallum, which is subtur- 

 binate with a long slender pedicle. 



4. Paracyathus cavatus, n. sp. PI. V figs. 1. la., very near Paracya- 

 thus crassus, Edw. & Haime. 



Corallum with a broad encrusting base, gently expanding into a 

 low, slightly curved, sub-circulav calice. 



Costse distinct from the basal encrustment, finely and distantly 

 granular, every alternate one conspicuously salient. 



Calice sub-circular, open, deep : the marginal axes in the same 

 plane. 



The finely and distantly granular septa are in five incomplete 

 crowded cycles, and do not project far into the calice ; those of the 

 first three cycles are exsert. Those of the incomplete fifth cycle are 

 small, and unite with those of the fourth cycle just below the calicular 

 margin, while those of the fourth cycle unite with those of the third 

 deep down in the calyx. The pali are in the form of numerous strong 

 salient and very regular denticulations of the septal margins, — exclud- 

 ing those of the last cycle : those of the primary septa are much the 

 most distinct, not because they are larger but because they are isolated. 



The columella is very small, deeply-seated and concave, consisting 

 of numerous minute close-set papilla?. 



The tips of the septa are coloured pale madder-brown. 



Greatest height of corallum 9 mm., major diameter of calice 11 

 mm., minor diameter of calice 10 mm., diameter of basal constriction 

 7 mm. 



From the Persian Gulf. 



The species is characterized by the very distinct alternately-sali- 

 ent costse, by the deep hollow calice into which the septa project but 

 little, and by the isolation of the series of strong paliform teeth opposite 

 the septa of the first cycle. 



5. Paracyathus fidvus, n. sp. Plate V, figs. 2. 2a., near Paracyathus 

 crassus, Edw. & H. 



Corallum low, with an extensively encrusting base, and a short 

 stout gently curved cylindrical peduncle which expands gradually into 

 a circular slightly drooping calicle. 



Costse indistinct at the base but gradually becoming distinct near 



