284 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 48. 



410-980/z, with a mean of 740/z, span breadth of arms 270-610/z, with a 

 mean of 470/x. The anchor plate (fig. 346) is oval, with a transverse 

 ridge near its narrowed hinge end. Holes are very numerous, each 

 lined with fine teeth; they are small and regular in the central part 

 but large and irregular toward the periphery. Length of anchor 

 plates 320-840/*, with a mean of 605/*, breadth 260-620/i, with a mean 

 of 490/*. Anchors and anchor plates are small in the anterior region. 

 Miliary granules are of the form of curved rods or parentheses (fig. 

 34c), measuring 20-60/* in length. These are especially clustered on 

 low round prominences, measuring 160/* across and sparsely scattered 

 on the skin. In digits of tentacles they are more slender and 40-90/* 

 long, with short branches at each end. In the radial muscles and the 

 deeper part of the wall of the tentacles are found very plump, oval or 

 sausage-shaped granules. Calcareous ring 2 mm. high, with a stone 

 canal and 7 Polian vesicles attached to it. Muscles well developed, 

 the radial bands measuring 5.5 mm. in breadth. Next to the esopha- 

 gus the alimentary canal presents a spherical dilation, 6 mm. in 

 diameter, followed by a muscular stomach, 30 mm. long and 2.5 mm. 

 thick. Genital tubes branched once or twice. Ciliated funnels not 

 very numerous, found in the left dorsal interradius. 



P. insolens (Theel) is doubtless very akin to this new species, but dif- 

 fers by the form of its miliary granules and by the holes of the anchor 

 plates being larger toward the center. The species also very much 

 resembles P. benedeni (Ludwig) and P. denticulata Kcehler and Vaney, 

 differing only in the shape of the deposits. 



Habitat — Kagoshima Bay, Kyushu. 



Ttype.— Cat. No. 34185, U.S.N.M. 



Genus ANAPTA Semper. 

 90. ANAPTA (?), species. 



Station 5080. One specimen. 



The specimen lacks its posterior part, measuring only 20 mm. in 

 length and 6 mm. in diameter. Color dirty gray. Tentacles 12, with 

 7 digits. Deposits totally absent, probably dissolved by the action 

 of acid. Calcareous ring very weak, embedded in a connective tissue. 

 Viscera all ejected. 



Habitat. — Off south of Izu Peninsula. 



Genus CHIRIDOTA Esehseholtz. 



91. CHIRIDOTA ALBATROSSH Edwards. 



Chvridota albatrossii Edwards, Albatross Holothurians, 1907, pp. 50-52, text-figs. 

 la-c, 2d-f, 3. 



Station 4993. One fragment. 

 Station 4994. Ten fragments. 



