688 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXII. 



BATHYPLOTES PATAGIATUS, new species. 

 Plate LXXII, figs. 1, la-k. 



Body rather long and narrow, truncately rounded at. either end; 

 ventral surface flattened; dorsal somewhat arched in life. Mouth 

 terminal but ventral; anus dorsal. Tentacles 19 to 20, rather small; 

 crown subcircular, peltate. Median ventral ambulacrum without 

 pedicels. A single, somewhat irregular series of numerous small 

 pedicels along each ventrolateral ambulacrum, and immediately above 

 these, on edge of body, another series of numerous small, warty 

 excrescences, terminating each in a slender papilla. These form a 

 narrow, overhanging brim to body, especially well marked at anterior 

 end. On dorsal surface are widely scattered, fair-sized conical pro- 

 tuberances, terminating in a long, slender papilla. In life body wall 

 is rather of a thick "jelly-fish" consistenc}^ the external perisome 

 being easil}' rubbed off. Deposits: In ventral perisome tables with 

 small annular disk, sometimes incomplete, and a spire composed of 

 four upright pieces, three to five crossbars and a crown ending in four 

 simple teeth; in the dorsal perisome disk is transformed into a four- 

 armed cross, perforated at tips, and the spire is frequently spiny along 

 uprights. At base of papillse disks are greatly enlarged, the ends of the 

 four-armed crossbeam being much dilated, and the spires are also 

 stouter and spiny on uprights. In papillae the spires are very tall, 

 with as many as nine or ten crossbeams, the disk becoming reduced 

 by degrees to the annular form. In papillae curved, spiny supporting 

 rods in addition to tables; in pedicels well-developed terminal plates 

 and small tables, similar to those of ventral perisome, in addition to a 

 very few supporting rods near the end plate. In subcutaneous muscle 

 layer, in walls of gonad, of cloaca, and intestine numerous C-shaped 

 bodies are present. Color in life, outside jellylike tissue transparent 

 gra3ash, with a tinge of pink, the central ""core" of animal being 

 bright rose pink, with a yellowish shade in places. Length, 165 mm.; 

 breadth, 14 to 20 mm. 



Localities.— Type (Cat. No. 21216, U.S.N.M.) from Station 1041, 

 west coast of Hawaii Island, 382 to 253 fathoms, gray mud, foramin- 

 ifera; bottom temperature 41.6°. Cotype (deposits), 3994, vicinity of 

 Kauai Island, 330 to 382 fathoms, fine gray sand, foraminifera. Taken 

 also at the following stations, 14 specimens, most of them in very 

 poor condition: 



List of f^tations. 



