NO. 1923. DESCRIPTIONS OF PACIFIC ALCYONARIA— NUTTING. 33 



in diameter. There are 12 calyces in a single row on each fully 

 developed leaf. 



The calyces are tubular, enlarging somewhat at the distal end 

 and with margins armed with 8 distinct sharp points, each point con- 

 taining a number of red spicules with their distal ends approximated. 

 A number of other spicules, mostly colorless, are embedded in the 

 calyx walls and usually vertical in position. The surface of the leaf 

 contains numerous spicules which are criss-crossed. Ova can be 

 seen in the transparent coenenchyma of the leaf. The calyces are 

 2 mm. high and a little more than 1 mm. broad at their margins. 



The ventral mid-line of the rachis is deeply grooved. 



The zooids differ greatly in size. There is a group of 3 or 4 very 

 large ones on the ventral surface, opposite the base of each leaf and, 

 continuous with these, a patch of 8 or 10 smaller ones extending 

 toward, but not reaching, the dorsal surface. All of the zooids are 

 conical in shape, their walls being beset with red spicules which have 

 their distal ends converging to a point. The ventral surface of the 

 rachis is beset with red spicules criss-crossed and intermixed with 

 colorless ones. The same is true of the dorsal surface. 



The spicules are as described above. All are red or colorless 

 needles, rather small. There are few if any on the stem. 



Color: The colony is grayish, except that the calyces are bordered 

 with light carmine red, and the rachis tinged with red. This color 

 is also seen in the swelling on the stem. The specimens are much 

 injured and dirty. Originally they must have been very daintily 

 colored. 



Locality.— Stsition 5071; Ose Saki, S. 53.5° W., 2.6 miles; 57 

 fathoms. 



Tyjpe-s^ecimen. — Cat. No. 30047, U.S.N.M. 



PENNATUXA BREVIPENNA, new species. 

 Plate 4, figa. 1, la. 



Colony very slender; leaves very short, so that the whole affair 

 approaches a virgularian in general appearance. Total length, 35.7 

 cm. Stem to rudimentary leaves 13 cm.^ very slender, with a not 

 very well marked swelling the middle of which is 5.3 cm. from the 

 end; and a slender end bulb. Diameter at swelling 3 mm. Least 

 diameter, between swelling and leaves, 1.3 mm. 



There are about 65 pairs of leaves, rather distant in proximal part 

 of rachis, and closely crowded on distal part. They are a lengthened 

 triangle in shape, 9 mm. long, in a straight line, and 4 mm. broad at 

 the base. They are alternate in position, and their bases overlap 

 each other on the mid-dorsal surface of the rachis. There are 10 

 calyces arranged in a single row on each fully developed leaf. The 



48702°— Froc.N.M.vol.43— 12 ^3 



