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REPORT ON THE REEF-CORALS. 59 
however, that the calicles are very rarely 1 mm. wide, the average size being scarcely 
more than 0°5 mm. Often they are scarcely or not at all prominent. In the extremely 
spinous nature of the branches, in this species limited to the upper portion, it approaches 
the Seriatopora spinosa; while the size and character of its cups and the compressed 
and coalescent nature of its branches relate it to Seriatopora valida, from which it 
seems scarcely justifiable to separate it. . 
Locality. 
Samboangan, Philippines. : 
5. Seriatopora cervina (Lamarck). 
Porites cervina, Lamarck, Hist. Anim. sans Vert., ii. p. 271, 1816. 
Seriatopora cervina, Milne-Edwards and Haime, Cor., iil. pp. 312 and 314. 
- ,,  briiggemann, Ann. and Mag. Nat. Hist., ser. 4, vol. xix., 1877,-p. 418. 
Two small specimens in the collection I have referred to this species, with which 
they agree in essential structure. The cells are generally rather far apart, especially at 
the basal part, and this gives a rather dense texture to the corallum. The structure of 
these small specimens agrees exactly with that of the basal and outer branches of large 
specimens of the species. One of the small specimens, from Banda, has a very roughly 
echinulate surface and generally very small branches, but it agrees so closely in other 
parts that it can only be regarded as a peculiarly grown specimen of the same species. 
The Seriatopora compressa, Studer, is very close to this species. 
Localities—Samboangan, Philippines ; Banda. 
6. Seriatopora compressa, Studer. 
Seriatopora compressa, Studer, Monatsber. d. k. preuss. Akad. d, Wiss. Berlin, 1878, p. 541, 
pl. iui. fig. 11. 
Two small specimens were collected which agree well with the description and figure 
of this species. In many calicles the upper margin, though finely divided, is not at all 
prominent. The septa are not perceptible except at the bottom of the cup, where a 
columella is present and is generally more developed and pointed in the calicles towards 
the apical parts of the branches ; nm the more basal calicles, the columella is broad, low, 
and scarcely marked, and the lateral pits are of very small dimensions, and often nearly 
obsolete. In general habit the species approaches the Seriatopora valida. 
Locality. 
Samboangan, Philippines. 
7. Seriatopora stellata, n. sp. (Pl. IL. figs. 4-40). 
Corallum closely ramose; the branches subequal, about 7 to 10 mm. thick, often 
coalescent, terete or slightly compressed where two or more coalesce, ascending, often 
