106 ZOOLOGICAL COLLECTIONS MADE DURING [Jan. 4, 



Labiopora moseleyi, sp. n. (Plate VI. fig. 11.) 



An upright well-branched frond, rising from a somewhat spreading 

 base and thick stem ; branches lying almost entirely in one plane, 

 all somewhat flattened from front to back except the terminal ones, 

 which are cylindrical and taper slightly to their generally somewhat 

 blunt points ; anastomosis between branches frequent. Colour of 

 stem, base, and anterior and posterior aspects of main branches pale 

 vermilion in the dry state, the same parts of the terminal branches and 

 the lateral portions of the main ones deep vermilion. An anterior 

 clearly distinguishable from a posterior surface, by the development 

 on it of numerous tubercles, chiefly in the terminal branches, which 

 are very slightly indicated on the latter. Surface minutely reticulate, 

 covered (slightly on the anterior face of chief branches and stem, 

 thickly on lateral faces of main branches and on anterior and lateral 

 faces of terminal branches) with small rounded tubercles, varying in 

 height up to about "4 millim., the largest generally pierced by 

 dactylopores. Dactylopores differing little in size, i. e. long diameter 

 from '1 to 'll millim. ; either round or oval; of two kinds, either 

 (i) placed in the general surface of the corallum, or (ii) in the 

 side or near the apex of a tubercle, forming a slit in its side ; the 

 tubercle in this case has a horseshoe-shaped outline, but with a 

 very thick convex side, as the dactylopore never occupies more than 

 half the apex of the tubercle, and is generally dominated by the 

 superior height of the apex of the tubercle ; no styles visible. Gas- 

 tropores found accompanying dactylopores, also to some extent alone 

 on interior surface of the larger branches ; round, provided with 

 deeply-set styles resembling camel's-hair brushes, diameter from 

 •32 to 'SS millim., each generally accompanied by one tubercular 

 dactylopore and one to three surface ones. Male gonangium 

 spherical, closely packed with oval or globular refringent pale 

 reddish-yellow cells with transparent contents. Coenosarcal canal- 

 system closely reticulate ; meshes generally about same diameter as 

 the canals which form them, viz. '035 to 07 millim. 



Examined. Dry, and by decalcification and subsequent mounting 

 of pieces in glycerine. 



Hab. Port Rosario, S.W. Chili (on the north side of chief island 

 of Madre-de-Dios archipelago), 2-10 fathoms, on a piece of cal- 

 careous rock. 



Obs. This Coral is of great interest as being closely allied to the 

 preceding species, the only one known hitherto of the genus Labiopora, 

 previously known only by a single dry specimen. It also is represented 

 by a single dry specimen, but of greater size, measuring 9'5 centims. 

 in extreme (present) height and 13'4 centims. in extreme present 

 breadth ; the contrast between the pale-red colour of the stem and 

 the deep colour of the branches gives it a fine appearance. The 

 gonangia were not found abundantly, perhaps owing to the early time 

 (March), at which it was taken. It difl"ers from L. antarctica in 

 having an anterior distinguished from a posterior surface, in the 

 small and uniform size of all the dactylopores, and in their being, 

 when present on the tubercles, mere excavations in their sides ; for the 



