74 THE VOYAGE OF H.M.S. CHALLENGER. 
This delicate species has many points of resemblance with the Galaxea cespitosa 
(Esper), but it can be most readily distinguished by the remarkable development of the 
septa and costee. 
A single specimen was obtained. 
Locality.—Amboina. 
Genus 38. Caulastrea, Dana. 
Caulastrea, Dana, Zoophytes, p. 196. 
The genus Husmilia, Milne-Kdwards and Haime, does not seem to differ in any 
marked particular from this genus, which claims priority, and should therefore be 
retained. 
Caulastrea distorta, Dana. 
Caulastrea distorta, Dana, Zoophytes, p. 199, pl. ix. fig. 5. 
The forms of this species are much branched, close and short clumps, the branchlets 
being generally quite short. The septa are often either nearly entire or very unequally 
denticulate and spinulous. 
A fine specimen was obtained. 
Locality.—Tongatabu. 
Genus 4. Huphyllia, Dana. 
HLuphyllia, Dana, Zoophytes, p. 157. 
sg Milne-Edwards and Haime, Cor., ii. p. 191. 
5 Duncan, Rey. Madrep., p. 84. 
Four species of this genus were obtained. 
1. Euphyllia glabrescens, (Chamisso and Eysenhardt). 
Caryophyllia glabrescens, Chamisso and Fysenhardt, Nova Acta Acad. ‘Nat, Curios., vol. x. 
pt. 2, p. 369, pl. xxxiii. fig. 1, A. and B. 
Luphyllia glabrescens, Milne-Edwards and Haime, Cor., ii. p. 192. 
Several specimens of this species were obtained. In one form the corallum 
becomes much raised and the calicles quite elongated and very deep, while the septa 
are very broad and loosely arranged; in another the corallum is small and very low 
the calicles short and stumpy, and the septa much narrower and closer. An inter- 
mediate specimen compels their being assigned to the same species. Five cycles are 
almost constantly developed, though often incomplete, 
Localities.—Banda ; Somerset, Cape York, shore. 
