III. Arbeiten iiber geographische Verbreitung und Localfaunen. 205 



along the sides of the body , as well as round its anterior and posterior extremi- 

 ties, thick, forming a continuous more or less thin border or brim, the breadth 

 of which is very considerable anteriorly. Tentacles 10-20. Mouth completely 

 ventral, at a considerable distance from the anterior extremity of the body. Hound 

 the edge of the brim there is a single row of numerous , commonly minute pedi- 

 cels , often resembling protuberances or wart-like prominences ; the foremost of 

 those prominences belonging to the dorsal ambulacra , the rest to the ventral 

 lateral ones. The odd ambulacrum generally with a double row of minute retrac- 

 tile pedicels; in one form naked. Calcareous deposits : spicula or four-armed, 

 cruciform bodies. Calcareous ring incompletely developed." Theel ( 79 j- 



iibersicht der Gattungen der Psychropotiden. 



I. Odd ambulacrum naked. 1. Psycheotrephes. II. Odd ambulacrum with a 

 double row of pedicels. A. Dorsal surface with a large appendage crossing the 

 odd interambulacrum : a) Body very depressed ; appendage comparatively short, 

 situated anteriorly on the posterior third of the body. 2. Euphromdes. b) Body 

 depressed anteriorly, increasing in height posteriorly ; appendage very long, si- 

 tuated close to or not far from the posterior end of the body. 3. Psychropotes. 

 B. Dorsal surface without any large appendage. 4. Bent/wdytes. 



Scotoanassa n. gen. Body very depressed, almost flat, with an extension of the 

 body-wall constituting a broad rather flat brim round its anterior and posterior 

 ends. Tentacles 10. The dorsal surface with processes only on the margin of the 

 anterior brim. The ventral surface with pedicels only round the margin of the 

 posterior brim. Integument with calcareous deposits, composed of four arms and 

 four outwardly directed processes. Theel ( 7! 'j ; diaphanan. 42 42' S., 134 

 10' 0., 2600 Fdn. 



Scotoplanes n. gen. Body varying from more or less elongated to ovate, almost glo- 

 bular, from one and a half to thrice as long as broad, sometimes depressed poste- 

 riorly. Tentacles 10. The dorsal surface with a small number of processes, 

 often of remarkable length and size. The ventral surface with pedicels all along 

 each side or only round its posterior half. Integument with two sorts of calca- 

 reous deposits : small spicula, curved in the form of a C ; and either large, 

 straight, unbranched spicula, or three -armed bodies. Theel ( 7 ' J ) ; hierher glo- 

 bosa Thdel (= Elpidia glolosa Theel, Prelim. Rep.). 53 55' S., 108 35' 0., 

 1950 Fdn. ; 33 31' S., 74 43' W., 2160 Fdn. - - mollis Thdel (= Elpidia mol- 

 lis Theel, Prelim. Rep.). 42 42' S., 134 10' 0., 2600 Fdn. - -papillosa Theel 

 (= Elpidia papillosa Theel, Prelim. Rep.). 3644'S., 46 16' W., 2650 Fdn. - 

 Murrayi Theel (= Elpidia Murrayi Theel, Prelim. Rep.). 6052'S., S020'0., 

 1260 Fdn. - - albidan. 3648'S., 1924'0., 1900Fdn. - - rolustan. 5355'S., 

 108 35' 0., 1950 Fdn. - - insignis n. 62 26' S., 95 44' 0., 1975 Fdn. 



Toxodora n. gen. Nahe Chirodota . "Tentacles 12, digitate; skin thin, with scattered, 

 slender, bow-shaped plates. Verrill ( 83 ) ; ferrvginea n. Neu-England. 



Trochostoma n. gen. Molpadidarum. Body long, cylindrical ; anterior extremity trun- 

 cate. Oral disk furnished with 1 5 tubular prolations , alternating with 1 5 oval- 

 shaped depressions, in which are 15 papillary tentacula. Posterior extremity 

 caudiform, elongate. Anal opening surrounded by 5 dentelli. Skin exceedingly 

 rugose. No suckers. 2 intestinal appendices (respiratory trees). Daniellsen und 

 Koren ( 27 ) ; Thomsoni n. 



III. Arbeiten iilber geographische Verbreitung und Localfauuen. 



Bell ( (i ) ftihrt aus dem Meere um Ceylon auf: Diadema setostim, Echinometra 



