REPORT ON CORALS—DEEP-SEA MADREPORARIA. 145 
MM. Milne-Edwards and Haime formed a genus Stephanoseris for a coral investing a 
shell with its base, found at Zanzibar, which they had previously placed in the genus 
Heterocyathus. They removed the species S. rousseaui from the genus Heterocyathus 
and the Turbinolide, and placed it far apart with Mungia: because of the presence in it 
of synapticule. There can, however, be no doubt from the exact resemblance in structure 
of the septa and pali that the true affinities of the coral are with Heterocyathus, and that 
the synapticulze must be considered as of minor importance. The species rousseaui should 
therefore be restored to the genus Heterocyathus, For a description of the genus 
Stephanoseris, and references to Milne-Edwards’ and Haimes’ papers on the subject (see 
Hist. Nat. des Coralliaires, tom. iii. p. 56). 
Deltocyathus. 
Deltocyathus italicus, Milne-Edwards and Haime. 
Deltocyathus italicus, M.-Edw. and H., Pourtales’ Ul. Cat. Mus., Harvard, No. 4, p. 15, pl. xi. figs. 
1-5, pl. v. figs. 9, 10; Lbid., No. 7, p. 35, pl vi. fig. 11; G. Lindstrém, Actinology of the 
Atlantic Ocean, Bd. xiv., No. 6, s. 10, pls. i ii. figs. 13-20, 
Deltocyathus italicus (x 3), Stellate variety of Pourtales. 
I have little to add to the very full accounts of the many varieties of the above species 
contained in the memoirs cited, and in Pourtalés’ later notes on the subject in the 
Bull. Mus. Comp. Zool., Harvard, vol. v. No. 9, p. 200. After comparing our series of 
specimens, which is very small in comparison with that at the disposal of Pourtalés, 
(ZOOL. CHALL, EXP.—PART. vil.—1880.) G19 
