ATLANT. DEEP-SEA EXPED. 1910. VOL. III.] 



ECH1NODERMATA 



11 



was unfortunately no sounding at stat. 92, but judging 

 from the maps of the depths in the North Atlantic the 

 depth can not have been less than 3000 m. The specimen 

 must therefore bave been taken about 1600 m. above 

 the bottom. 



Benthodytes glutinosa was previously taken by the 

 "Talisman" off the Azores and in the Sargasso Sea. Ac- 

 cording to the explorations of the "Michael Sars"i its hori- 

 zontal distribution will be from 27° 27' to 48° 29' N., the 

 bathymetrical distribuation from 1400 to 3432 m. 



Benthodytes janthina v. Marenzeller 



Benthodytes janthina v. Marenzeller, Holothuries, Res. Camp. 

 Sci., Monaco, Fase. 6, 1893, p. 10, tab. 1, fig. 3, tab. 3, fig. 4. 



•'»/*. Stat. 10, 45° 26' N., 9° 20' W., 4700 m., yellow mud. 

 temp. 2.56° Cel. One specimen, 220 mm. long. 83 mm. broad. 



A coloured sketch made immediately after the animal 

 had come on deck shows that the colour of the ventral 

 side was intensely violet, that of the dorsal side light 

 violet, considerably lighter than in the specimen illustrated 

 by v. Marenzeller, the colour of which agrees more with 

 that of the ventral side in the specimen under discussion. 

 In alcohol the ventral side is a deep blackish blue, the 

 dorsal side light grayish blue. 



Benthodytes janthina was previously found by the 

 "Hirondelle" and the "Princesse Alice" off the Azores 

 and the west coast of Morocco. The "Michael Sars" 

 collected the species in the Bay of Biscay, hence its 

 horizontal distribution will be from 34° 4' to 45° 26' N., 

 the bathymetrical distribution from 2252 to 4700 m. 



Cucumaria abyssorum Th6el. 



Cucumaria abyssorn/n Theel, Holothurioidea 2, Rep. Sci. Res 

 Voy. "Challenger", Zool. vol. 14, part 39, 1886, p. 66, tab. 4 fig. 6, 7, 

 tab. 5 fig. 1, tab. 16 fig. 6. 



"Vo. Stat. 88, 45° 26' N., 25° 45' W., 3120 m, sand and yellow 

 mud. 3 specimens. 



Theel and Ludwig 1 ) have given a very detailed de- 

 scription of this species to which I shall merely add that 

 the majority of the calcarious deposits in the tentacles 

 are composed of bowed rods whose form may be seen 

 from the present figures (figs. 9 a — c). They very much 

 resemble the deposits in the ambulacral papillae. Fig. 9 d 

 is an extreme form of this type. Further straight rods, as 

 well as a few scattered cruciformed deposits (fig. 9 e) are 

 found in the tentacles. 



Cucumaria abyssorum was taken by the "Challenger" 

 in the Antarctic, Indian, and southern part of the Pacific 

 Oceans, 3516—4061 m., temp. 1.2—2° Cel. The "Alba- 



') Ludwig: Albatross Holothurioidea, p. 122. 



Fig. 9. 

 Calcareous deposits from tentacles of Cucumaria abyssorum Theel. 



tross" took it off the west coasts of Central America and 

 Mexico, 1656—4084 m., temp. 2.1—2.9° Cel. and the 

 "Hirondelle" at the Azores, 2870 m. Thus the species 

 has a world-wide distribution. 



Holothuria tubulosa Gmelin. 



Holothuria tubulosa Gmelin, Syst. Nat., ed. 13, 1788, p. 3138. 

 2 %. Stat. 37, 26° 6' N., 14° 33' W., 39 m., shingle. Common. 



The specimens were chestnut brown on the dorsal 

 and lemon yellow on the ventral side. 



Holothuria tubulosa is known from the Mediterranean, 

 the Canaries and the south west coast of France. The 

 bathymetrical distribution is 0—40 m. 



Stichopus tremulus Gunnerus. 



Holothuria tremula Gunnerus, K. Sv. Vet. Akad. Handl., vol 

 28, 1767, p. 119, tab. 4, fig. 3. 



'%. Stat. 3, 49° 32' N., 10° 49' W., 184 m., fine sand. Rather 

 common. 



W U. Stat. 4, 49' 38' N., 11° 35' W., 923 m., sand and mud, 

 temp. 9.2° Cel. Several specimens. 



Ludwig states in "Arktische und subarktische Holo- 

 thurien" (p. 136) that the northern border of Stichopus 

 tremulus is at 71°, the southern at 43° or the northern 

 coast of Spain, and that its bathymetrical distribution is 

 from 18 — 1229 m. The researches of the "Talisman" and 



