262 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 48. 



species is named for Prof. Kurt Lampert of Stuttgart, with reference 

 to his first discovery of a cucumarid with brood-pouches. 



Habitat — Aleutian Islands and vicinity of Commander Islands. 



Type.— Cat. No. 34166, U.S.N.M. 



61. CUCUMARIA SPINOSA, new species. 

 Plate 10, figs. 20a-c. 



Station 5043. One specimen. 



Station 5046 or 5047. Four specimens. 



Station 5053. One specimen. 



Body fusiform and strongly curved, with a long tapering posterior 

 prolongation, as in C. calcigera. The largest specimen is 68 mm. 

 long and 10 mm. across. Color white, integument thin and stiff, 

 rough to the touch. Tentacles strongly retracted together with 

 introvert, ventral two being smaller than the rest. Pedicels knob- 

 like, arranged in an irregular zigzag row in each ambulacrum; above 

 30 pedicels in a row in the bivium, above 50 in the trivium. Inter- 

 ambulacra naked. Anal papillae five. Deposits of perisome are 

 elongated oval buttons, thickest at the middle, with a tail-like pro- 

 cess at the broader end (pi. 10, figs. 20a, b). There are 2, seldom 3, 

 rows of holes, usually 8 or 9 in number, but varying from 4 to 25. 

 The tail-like process has a small hole and a pair of short spines at its 

 end. As may be seen from comparison with an early stage (fig. 20c), 

 these deposits are developed along an axis making an angle of about 30° 

 with that of the primary cross. Length varies 125-400/*, thickness 

 about 35m. They lie thickly imbricated, with the tail-like process 

 turned backward and obliquely protruding from skin. In the 

 introvert deposits are thinly scattered delicate plates. Anal teeth 

 quite rudimentary. In pedicels are found bent, irregular, rod-like 

 plates, and an imperfect end-ptate represented by delicate, branched 

 rods. Supporting rods of tentacles are irregularly perforated. 

 Calcareous ring consists of ten high, narrow segments, radials about 

 3 mm. long, deeply notched posteriorly but without prolongations. 

 Retractors slender, inserted to body wall at about one-third the length 

 of contracted body. Polian vesicle single, stone-canal also single 

 with a large fungiform madreporite. Respiratory trees 4, 2 on each 

 side, over 20 mm. in length, opening into the anterior end of the 

 cloaca, which is 30 mm. long. Genital tubes unbranched. 



The present species resembles O. Icorseensis Ostergren in many 

 respects, but differs in shape of deposits and anal teeth. The char- 

 acteristic spicules remind one of those of C. faUax Ludwig as figured 

 by Edwards. 1 



Habitat. — Off Hitaka, Hokkaido; off Ojika Peninsula; Suruga Bay. 



Type.— Cat. No. 34167, U.S.N.M. 



1 Four species of Pacific Holothurians, 1910, pi. 19, fig. 22. 



