56 PROCEEDmaS of the national museum. vol. 43. 



Locality. Stsition 5080; Omai Saki Light, N. 23.5° E., 28 miles; 

 505 fathoms. 



Type-locality. — Georges Bank, Atlantic coast of United States, 

 1,242 fathoms. 



CHRYSOGORGIA DICHOTOMA Thomson and Henderson. 



Chrysogorgia dichotoma Thomson and Henderson, Alcyonaria of the Indian 

 Ocean, I, Alcyonaria of the Deep Sea, 1906, p. 29. 



The specimens are all incomplete. One is 6.8 cm. in height, with 

 a diameter of 6.3 cm. The stem is very strong, wiry, and brittle. 

 The branches are arranged in a spiral of 1/5, left-handed. The 

 branches are closely approximated, a whorl occupying but 3 mm. of 

 the stem. The longest branch is 4.2 cm. in length. The branches 

 divide dichotomously, sometimes forking as much as five times. The 

 polyps are lacking on the main stem, and on the proximal internodes 

 of the branches. On one branch there are 3 polyps on the third inter- 

 node, 7 on the fourth, 6 on the fifth, and 2 or 3 on the last. The 

 fourth internode is the longest (12 mm.). Many of the polyps are 

 stripped off, but it is not uncommon to find as many as 8 on an inter- 

 node. 



The individual polyps have the bodies greatly expanded with ova, 

 thus being ovate in shape and enlarging again at tentacle bases ; small, 

 measuring less than 1 mm. to tentacle bases. The body spicules are 

 bar-shaped, not scales, with somewhat enlarged ends, more slender 

 than in C. japonica.^ They are irregular in distribution, with a 

 decided tendency to a vertical position, sometimes .with an approach 

 to 8 longitudinal bands. The dorsal surfaces of the tentacles are 

 covered with sharply marked bands of similar spindles, there being 

 two to three rows to the band. Similar but somewhat more slender 

 spicules are embedded loosely in the ccenenchyma of the twigs and 

 branches. 



The zooids are numerous on the surfaces of the branches between 

 the polyps. 



Color: The axis is dark green, with a metallic luster in main stem. 

 The branches are golden-brown proximally, lightening distally to a 

 light green. The axis of the branches and twigs has a brilliant green 

 luster except at ends of twigs. The polyps, in alcohol, are of a 

 decided reddish-brown, thus differing from any others that I have 

 seen in the genus. 



Localities. -^tatioTL 4894; Ose Saki Light, N. 41° E., 5 miles; 95 

 fathoms. Station 4936; Sata Misaki Light, N. 21° E., 5.7 miles; 103 

 fathoms. 



The type-locality is in the Indian Ocean. 



1 According to Versluys, Chrysogorgiidae of the Siboga Expedition, p. 70. 



