II. Arbeiten von speciellerern Character etc. 5. Holothurioidea. 203 



long and wide, cylindrical or conical, slightly retractile pedicels, disposed in a 

 single row all along each side of that surface, or round its posterior half, or only 

 on the margin of a brirn surrounding the hindmost extremity of the body ; the 

 odd ambulacrum naked ; the dorsal surface with a smaller number of sometimes 

 very long, sometimes rather short or nearly rudimentary processes, commonly 

 disposed on its anterior part, or with a large branched or unbranched lobe-like 

 appendage, situated anteriorly or forming a brim round the foremost extremity 

 of the body ; calcareous deposits : straight or slightly curved, C-shaped and horse 

 shoe-shaped spicula , three- or four-armed bodies, more seldom a few minute, 

 net-like plates , minute wheels , rosette-shaped or elliptical bodies ; calcareous 

 ring composed of only five spicule-shaped pieces . each consisting of a number of 

 long, slender rods, diverging in opposite directions from a small central part. 

 Theel ( 79 ). 



Ubersicht der Gattungen der Elpidiidae. 



I. Tentacles 10. A. Dorsal surface with processes most frequently of consider- 

 able size. a. Body very long , cylindrical , Synapta-shaped. Processes of 

 the dorsal surface almost inconspicuous. Calcareous deposits four-armed, 

 with a single long central process, directed outwards. \.Parelpidia. b. Body 

 more or less elongated, ovate, cylindrical, or depressed posteriorly. Processes 

 of the dorsal surface generally large. 1. Calcareous deposits: four-armed 

 bodies with large processes, and, besides, sometimes small wheels. I.Elpidia 

 Theel. 2. Calcareous deposits : unbranched spicula or three-armed bodies, 

 and, besides, always small C-shaped spicula. 3. Scotoplanes. 3. Calcareous 

 deposits: simple, irregularly curved, horseshoe-shaped bodies, scattered 

 straighter spicula, and sometimes a few perforated, net-like plates; a. Ma- 

 dreporic canal opening externally. 4. Kolga Dan. u. Kor. fi. Madreporic 

 canal not opening externally. 5. Irpa Dan. u. Kor. B. Dorsal surface with 

 a large lobe-like appendage anteriorly, and commonly with some minute 

 processes. 6. Peniagone. C. Body very depressed, almost flat, with a large 

 brim round its anterior and posterior ends. 7. Scotoanassa. 

 II. Tentacles 1012. 8. AcMyonice. 

 III. Tentacles 20. 9. Enyjmiastes. 



Enypniastes n. g. >;Body very depressed, with an extension of the body-wall round 

 its anterior extremity, constituting a very large, broad, rather flat brim. Ten- 

 tacles 20 (?). The dorsal surface with small projections round the margin of the 

 brim and with some other very small processes on its ambulacra. Pedicels along 

 the sides (?) and round the posterior extremity of the body. Theel ( 79 ( ; eximia n. 

 40 28' S.. 177 43' 0., 1100 Fad. 



Euphronides n. g. Body very thin and depressed, with the brim, especially round 

 its anterior and posterior extremities, rather broad. Mouth and anus ventral, at 

 some distances from the ends of the body. Tentacles IS. Pedicels arranged in a 

 single row round the edge of the brim and in a double one along the odd ambula- 

 crum. The dorsal surface with a few pairs of more or less minute processes, and 

 with a large conical appendage crossing the odd interambulacrum at a consider- 

 able distance from its posterior extremity. Theel (~ 9 ); depressa n. 35 47' N., 

 S 23' W., 1090 Fad.; 33 42' S., 78 18' W., 1375 Fad. 



Irpa n. g. Elpididarum. Body almost cylindric, bilateral. The mouth nearly cen- 

 tral. The anus placed at the posterior extremity. 10 short, thick, lobed tenta- 

 cula ; the lobes palmate. Along the sides of the trunk, placed opposite one to 

 the other, 9 pairs of long, stiff, non-retractile suckers, and 6 suckers, similar in 

 form and arrangement, round the posterior extremity. On the back. 2 rows of 



