29 



retracted, and, when retracted, are disk-shaped. The entire dorsal surface of die infolded 

 tentacles is covered with a complete armor of flattened longitudinal spindles or bar-like fonns, 

 there being numerous longitudinal series on each tentacle. 



A cross section of a branch shows a relatively thin ccenenchyma filled with oval, closely 

 tuberculated spicules. The water-vascular canals are inconspicuous and not so regular as in 

 many species. They do not penetrate the axis. The axis is quite hard and well differentiated, 

 composed of an agglutinated mass of spicules with horny sheaths and. smooth surfaces and 

 connected by various bridges and adhesions into a sort of mesh or network. 



Spicules. These are almost entirely of two kinds; i st regular, very short, usually oval 

 spindles with close-set whorls of tubercles, there usually being four such whorls besides the 

 distal caps ; 2 nd the irregular smooth spicules of the axis described above. Besides these there 

 are the long flattened scale-like spindles of the tentacles. 



Color. The colony is dark red, and the polyps white. 



A very large specimen from Station 71 appears to belong to this species. It is 107 cm. 

 in height and very profusely branched, the branching often being dichotomous and sometimes 

 unilateral. The species agrees well in detail with the type, from Station 273, although the 

 spiculation of the polyps can not be very well determined, the specimen being dried. The 

 colony is covered with a white substance as if it had been overgrown with mould, but when 

 fragments are placed in water they show an orange red color. 



6. Suberogorgia thomsoni new species. (Plate VI, figs. 2, 2a \ Plate XI, fig. 8). 



Stat. 154. o°7.2N., I30°25'.5E. 83 meters. Gray muddy sand, shells and Lithothamnion. 



(Type). 

 Stat. 204. 4°2o'S., 122 58' E. 75 — 94 meters. Sand with dead shells. 



Colony flabellate, not reticulate, 8.5 cm. high and with a spread of about 5.5 cm. 

 The stem and branches are round in section, although the latter appear flattened on account 

 of the lateral arrangement of the polyps. Stem 1.9 mm. in diameter and 1.8 cm. long to first 

 branch. The first branch is large, forming about half of the colony, and bears four lateral 

 branches, three of which are compound. The remainder of the main stem bears seven lateral 

 branchlets, two of which are compound. The branches tend to an alternate arrangement with 

 very unequal spaces between them. The ultimate twigs are about 1 mm. in diameter. There 

 are slight indications of median grooves on the main stem and larger branches, but they are 

 quite indistinct and finally lost on distal parts of the colony. The calyces are regularly lateral 

 and alternate in position. 



The individual calyces are subconical in shape, a typical one measuring 1.2 mm. in 

 height and 1.9 mm. in diameter at the base. The calyx walls are filled with comparatively 

 heavy spindles, most of which are placed vertically. These differ materially from the oval forms 

 which are found in the calyx walls of other species of this genus. 



The polyps are completely retractile. The collaret is delicate, consisting of but one 

 or two rows of slender encircling spindles, above which other spindles are arranged en chevron 



