236 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.48. 



California (Ludwig, 1894; Clark, 1913); near Oshima Island (Kishi- 

 nouye, 1894); Sagami Sea (Mitsukuri, 1912). 



25. PANNYCHIA MOSELEYI VTRGULIFERA, new subspecies. 

 Plate 8, figs. 8a, b. 

 Pannychia moseleyi Edwards, Albatross Holothurians, 1907, pp. 62-64. 



Station 4768. Ten specimens. 



Station 4769. Seven specimens. 



Station 4770. Four specimens. 



Station 4771. One specimen. 



Station 4781. Six specimens. 



Station 5015. Two specimens. 



Station 5029. One specimen. 



Station 5032. Five specimens. 



Station 5033. One specimen. 



Station 5036. One specimen. 



Station 5039. Two specimens. 

 Trie largest specimen measures 210 mm. in length, 70 mm. in width, 

 and 35 mm. in height. Color in life "pearly white with a bluish tint, 

 papillae reddish-purple;" in spirit some specimens almost retain their 

 natural color, but others are white to light blue and rose, or brown. 

 Ambulacra! appendages purple in majority, but yellowish-brown in 

 some. Tentacles 20. Pedicels of the ventrolateral ambulacra large, 

 25-40 in each. Along the midventral ambulacrum are 12-50 pedicels 

 arranged in a zigzag or double row. Dorsal papillae small, at most 3 

 mm. long, scattered all over, only leaving in some specimens narrow 

 naked areas along the 3 inter ambulacra. Along the inner (median) 

 side of dorsal ambulacra stand about 8 pairs of long whiplike papillae, 

 attaining the length of 20 mm. All the external and internal charac- 

 ters are those of P. moseleyi, but numerous " straight or arcuated, simple 

 or branched, spinous" bodies (pi. 8, fig. 8a) occur in large numbers in 

 all the specimens, uniformly scattered on ventrum. In some speci- 

 mens they are highly spinous at ends, in others quite smooth (fig. 8b), 

 and in rare cases three- or four-rayed. Length of these rods varies 

 from 70 to 400 p., with a mean of about 240 /i. Similar rods are also 

 numerous in walls of pedicels. 



The specimens above described differ from those of P. moseleyi only 

 in having numerous rods in ventrum. In P. moseleyi the rods are 

 never present in ventral perisome, but occur in small numbers in 

 pedicels. I think that the specimens before me, together with a single 

 specimen identified as P. moseleyi by Edwards, are to be distinguished 

 as a northern form of that widespread species and deserve recog- 

 nition as a subspecies. 



Habitat. — Sitka, British Columbia (Edwards, 1907); Aleutian 

 Islands; off Cape Terpyeniya, Sakhalin; east of southern Sakhalin; 

 east and south of Hokkaido. 



Type.— Cat. No. 34155, U.S.N.M. 



