37 

 The diameter of the calicle of the parent and of full-grown buds is about 3.5 millim. 



I place this species in Martin Duncan's genus Pourtalosmilia, without however being 

 able to appreciate the difference between this genus and the Triassic and Jurassic genus Goniocora. 

 In external form this species much resembles the Caryophyllia arbuscula figured by Dana on 

 plate 27 of his "Zoophytes." 



MADREPORARIA FUNGIDA. 



IV. Family Lophoserid.k Martin Duncan. 

 Only two genera of this family are represented in the collection. 



XXIV. Bathyactis Moseley. 



Bathyactis Moseley. Challenger Deep Sea Madreporaria, p. 185. 



The collection contains four species, one of which is doubtfully referred to this genus, 

 since it has a crown of large and very distinct pali opposite the septa of the second order. 



Synopsis of the Siboga species of Bathyactis. 



I. No pali distinguishable : 



1. Septa in four complete cycles \. B. symmetrica. 



2. Septa in five complete cycles: 



I. Basal wall flat, septa low 2. B. Sibogce. 



II. Basal wall very concave, septa very high 3. B. stephana. 



II. A crown of pali opposite the septa of the second order 4. B. palifera. 



56. Bathyactis symmetrica (Pourtalès) Moseley. 



Fungia symmetrica Pourtalès. Illustr. Catalogue Mus. Comp. Zool, N° IV, 1871, p. 46, pi. 



VII, figs. 5, 6: Martin Duncan, Trans. Zool. Soc. VIII. 1873 — 74, p. 334, pi. XLIX, 



figs. 16 — 19. 

 Bathyactis symmetrica Moseley. Challenger Deep Sea Madreporaria, p. 186, pi. XI, figs. 



1 — 13: Jourdan, Zoanchaires du yacht 1'Hirondelle (Monaco, 1895, p. 28): Alcock Investi- 



gator Deep Sea Madreporaria, p. 28. 



Stat. 12. 7 15' S., U5°is'.6E. 289 m. 1 Ex. 



Stat. 18. 7°28'.2S., ii5=24'.6E. 101S m. 8 Ex. 



Stat. 59. io°22'.7 S., i23°i6'.5E. 390111. 1 Ex. 



Stat. 95. 5°43'.5X., ii9°4o' E. 522 m. 9 Ex. 



Stat. 178. 2 40' S., i28 3 37'.5E. S35 m. 3 Ex. 



Stat. 20S. 5 39' S., 122 12' E. 1886 m. 1 Ex. 



Stat. 241. 4 24.3 S., I29°49'.3E. 1570 m. 1 Ex. 



-Label lost" 28 Ex. 



Distribntiou. All the Oceans, from 32 to 2900 fathoms. 



