REPORT ON THE REEF-CORALS. 109 
2. Leptastrea ehrenbergana, Milne-Edwards and Haime. 
Leptastrea ehrenbergana, Milne-Edwards and Haime, Cor., ii. p. 494, pl. D. 7, fig. 4. 
A specimen in the collection differs from the Red Sea form in having the cups deeper, 
being generally as much as 3 mm. The small septa are sometimes united with one 
another at the centre, as in Leptastrexa stellulata. 
This species, which has been redescribed and figured by Klunzinger,’ seems to be 
scarcely distinct from Leptastrea purpurea (Dana). 
Locality.—Tahiti. 
3. Leptastrea roissyana, Milne-Edwards and Haime. 
Leptastrea roissyana, Milne-Edwards and Haime, Ann. d. Sci. Nat., ser. 3, vol. x. pl. ix. fig. 6; 
Cor., ii. p. 494. 
The form of the corallum is very variable owing to the shape of the body which it 
incrusts; generally, however, it becomes thick, massive, and convex at the central portion. 
Two small, unevenly convex specimens are in the collection. 
Locality.—Tahiti. 
4, Leptastrea transversa, Klunzinger. 
Leptastrea transversa, Klunzinger, Cor. roth. Meer., iii. p. 46, pl. vi. fig. 2. 
A specimen in the collection differs from the ordinary plate-hke form of the species 
in having an irregular nodular incrusting corallum, which assumes the shape of the body 
it has covered. The thin grooved walls and the very thin septa give a delicate appear- 
ance to the species. The cups are often nearly 3 mm. deep, and the columella but 
slightly developed. 
Locality. —Tahiti. 
Genus 27. Merulina, Ehrenberg. 
Merulina, Ehrenberg, Cor. roth. Meer., p. 104. 
53 Milne-Edwards and Haime, Cor., ii. p. 628. 
x Duncan, Rev. Madrep., p. 128. 
Two species of the genus were obtained. 
1. Merulina crispa, Dana. 
Merulina crispa, Dana, Zoophytes, p. 274. 
A small specimen of this small species was obtained. The septa are not evenly lax, 
but are generally closely placed, except at the extreme apical parts. The Merulina 
1 Cor. roth Meer., iii. p. 46, pl. vi. fig. 3. 
