NO. 1923. DESCRIPTIONS OF PACIFIC ALCYONARIA— NUTTING. 69 



THOUARELLA STRIATA Kiikenthal. 



Plate 10, figs. 2, 2a. 



Thouarella striata Kukenthal, Gorgoniden des Deutschen Tiefsee Expedition, 

 1907, p. 204. 



Colony flabellate in form, 32 cm. in height and with a spread of 

 25 cm. The main stem is 1 cm. thick near base, and flattened, as 

 are the main branches, and after sending off a few irregular small 

 branches on one side the stem (11.5 cm. from its base) divides into 

 two large branches. These divide irregularly into several branchlets, 

 and these again sometimes divide until branchings of the fifth order 

 are reached. The ultimate twigs are pinnately arranged, close set, 

 often forking, and forming a flabellate structure. 



The calyces are in irregular whorls of 5 or 6 to even 10, closely 

 set, nowhere distinct; but the calyces are arranged as in the genus 

 Eunicea, for instance, without distinction of well-defined whorls 

 even on the ultimate twigs. The calyces distinctly overlap. In 1 

 cm. there are about 10 calyces in as near a longitudinal series as 

 can be found. The individual calyces are not so decidedly bent 

 toward the branch as is usual in this genus, but the adaxial rows 

 of scales are reduced to 2 or 3. The calyces are about 1.5 mm. 

 high, club-shaped, with a greatest diameter of about 1 mm. The 

 polyps face upward, not inward. The scales all have ctenate edges, 

 the upper ones have radiating ribs and the basal ones are without 

 evident ribs. All scales have distinctly granulated or verrucose 

 surfaces, and the distal ones have radiating ridges, as stated above. 



All but the adaxial scales have usuafly 6 scales each, and the 

 distal scales have each a median rather blunt projecting point and 

 a series of smaller lateral points on either side. 



The operculum is low, scarcely projecting above the marginal 

 points, the individual flaps being rather thick triangular scales 

 with a roughly granulated surface. The ab axial ones project over 

 the points of the adaxial. 



The coenenchyma of the branches is covered with a mosaic of 

 irregular scales. 



Locality. — Station 4778, Semisopochnoi Island, right tangent S. 

 45° W., left tangent S. 12° W., about 12 miles; 43-33 fathoms. 



Type-locality. — East side of Bouvet Island, South Sea, 457 meters. 



The lateral branches and terminal twigs of the specimen described 

 are coarser than is usual in this genus, reminding one of Caligorgia. 



THOUARELLA ALTERNATA, new species. 

 Plate 9, figs. 1, la; plate 19, fig. 3. 



Colony 16 cm. high, and with a spread of 5.6 cm. The ultimate 

 branches are borne on three sides of the main stem and reach a length 

 of 3.2 cm, and are thickly emplanted, the distance between adjacent 



