694 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXII. 



which extend about two-thirds length of animal, from posterior end. 

 Along- each ventro-lateral radius is a series of about ten rather large 

 pedicels which extend from posterior end to about middle of bod3\ 

 Above these on edge of body is a single continuous series of papillae, 

 which form a conspicuous brim only at anterior and posterior extremi- 

 ties, above mouth and below anus, respectively. Along each dorsal 

 ambulacrum is a fairly regular series of widely spaced, slender papilla? 

 usually diiBcult to discern. Body wall thick and jelly-like in life. 

 External perisome very thin and easil}^ rubbed off. No calcareous 

 deposits of any description. An extensive rete mirabile present. 

 Color in life, the mass of soft jelly-like tissue a milky pinkish, becom- 

 ing a pale pinkish lilac about mouth and tentacles; viscera show a yel- 

 lowish tinge through the translucent body wall; purple about tentacles, 

 sometimes deeper in shade; perisome minutely dotted with dark 

 purplish, the dots being numerous, but very inconspicuous unless 

 examined with a glass. Length, 135 mm. ; breadth, 35 mm. 



Localities.— Ty^Q (Cat. No. 21218, U.S.N.M), Station 4151, vicinity 

 of Bird Island, 800 to 313 fathoms, fine coral sand foraminifera, stones; 

 bottom temperature, 38.8°. Cotj^pe, Station 4110 Kaiwi Channel, 

 between Molokai and Oahu islands, 449 to 460 fathoms, gray sand. 

 Taken at following stations, in all 23 specimens, the majority very 



imperfect: 



List of stations. 



Most of the specimens are badly dilapidated on account of the 

 extreme delicacy or softness of the outer portion of the body wall. 

 Kough usage in the dredge has removed a large part of the perisome 

 and many of the pedicels, papilhe, and even tentacles from the majority' 

 of specimens. The cliagnosjis and description are gathered from three 

 specimens, reasonably well preserved. The absence of deposits makes 

 the identification of this species a diflicult matter, but I believe I am 

 justified in considering it a new form, in view of the differences whicii 

 appear to exist between it and its apparent nearest relative. The form 

 of the body varies with the state of contraction, but seems to be thick ^ 

 est in the middle, the anterior and posterior ends being bluntly rounded, 

 the former with a well defined rim of papillae. Although the mouth 

 is ventral, it is at the end of the body and is surrounded by a fairh^ 

 broad peristome. The tentacles are about 5 to 8 mm. long, unless 



