574 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxiv. 



Distribution.— O^ French Frigate Shoal; Station 3973, 395-397 

 fathoms (Cat. No. 25386, U.S.N.M.). 



Specimens were secured by the Challenger in the South Atlantic, 

 near Tristan da Cunha, at a depth of 75 fathoms; and off Nightin- 

 gale Island, 100-150 fathoms. 



Genus CALIGORGIA Gray (emended by Studer). 



Calyces bilateral, appressed to the cortex. Spicules scale-like, often 

 with consjaicuous sculpturing in the form of radiating ridges and 

 ctenate edges. 



CALIGORGIA GILBERTI, new species. 

 Plate XLIII, fig. 4; plate XLVII, fig. 6. 



Colony (incomplete) about 325 mm. high. Main stem wavy in. out- 

 line, giving off alternate branches which themselves often resemble 

 the main stem and which give off alternate branchlets at intervals of 

 about 18 mm. The whole colony is fiabellate in form. 



Calyces arranged in whorls of five (rarely four) to seven, rather 

 closely approximated, club-shaped, with their inner sides appressed to 

 the cortex. Height, 1^ mm. 



Spicules on calyx walls squamiform, numerous, with imbricating 

 edges, distal edge often ctenate. The rows of scales are in annular 

 whorls, and the more distal ones are often sculptured with radiating 

 lines ending in the points which form the ctenate distal edges of the 

 scales. Oi3ercular scales eight, broad, flat, curved, the ventral ones 

 not being notably smaller than the dorsal. 



The distal ends of the polyps are bent strongly toward the cortex, 

 so as to face the stem or branch. 



Color. — Light yellow in alcohol. The fresh specimens were a 

 bright corn yellow. 



Named for Prof. Charles H. Gilbert, of Stanford University. 



Type.— C2.t. No. 25364, U.S.N.M., Albatross Station 4130, off 

 Kauai, 283-309 fathoms. 



Distribution.— O^ Kauai: Station 3992, 528 fathoms (Cat. No. 

 25363, U.S.N.M.) ; Station 4130, 283-309 fathoms (Cat. Nos. 25364 

 and 25388, U.S.N.M.); Station 4132, 257-312 fathoms (Cat.. No. 

 22592, U.S.N.M.); Station 4134, 225-324 fathoms. Off Hawaii: 

 Station 4041, 382-253 fathoms. 



Genus STENELLA Gray. 



Polyps in whorls, with their calyces rigidly extending at right 

 angles from branches. Body scales very large, in less than five rows, 

 and very distinct from the opercular scales. 



