48 L'ch. EC HI NO D K K MATA . 
Family 2. Elasipoda. 
Subfamily 1. Psychropotidte. 
Subfamily 2. Deimatidie. 
Subfamily 3. JElpidiidiv. 
Family 3. Dendrochirotas. 
Family 4. Molpadiidic. 
Order li. Paractinopoda (with the teutacle canals arising 
directly from the ring canal). 
Family 5. Synaptidce. 
For a history of the system of Holothurians, with a discussion of the 
importance of the body form for the system, see Ludwig, (5) pp. 303- 
325. 
For a detailed systematic list of the orders, families, genera, and species 
of Holothurians, with diagnoses of the orders, families, and genera (3 new 
genera), see Ludwig, (5) pp. 325-361. 
For the horizontal distribution of Holothurians, see Ludwig, (5) pp. 
362-379; for the vertical distribution, id. pp. 379-382; for the palaeon- 
tology, id. pp. 438-446. 
IlolothurioUlea occurring on the New England coast ; Fewkes, p. 90 : 
of Labrador coast ; Packakd, p. 371 : various llolothurioidea from the 
Bay of Bengal ; Wood-Mason & Adcock, (1) p. 15, and id. (2) pp. 442 
& 443. 
K Amphigynnas, n. g., for A. multipcs , n. sp. ; Walsh, p. 199, Andaman 
Sea, 188-220 faths., Green Mud. 
Anhyrodermu. Ludwig (1) revises the genus, and reduces the number 
of species to seven, as follows: (l) A. niusculus, ltisso, syun. A.perrieri, 
Petit, 1883, A. Jiispanicum, Petit, Mediterranean, Cape Finisterre, 36-285 
faths. ; (2) A. Jeffrey aii , Dan. A Kor., synu. A. a (finis, Dan. & Ivor., 1879, 
A. jeffreysii var., Theel, 1886, A. affine var., Theel, 1886, Arctic, N. 
Atlantic and Lesser Antilles, 127-810 faths. ; (3) A. roretzii , v. Mar., 
1881, Japan ; (4) A. danielssenii , Theel, 1886, Antarctic Ocean, 400 faths. ; 
(5) A. simile, Theel, 1886, Japan, 345 faths. ; (6) A. marenzellei-i, Theel, 
1886, E. New Zealand, 700 faths. ; (7) A. agcissi.zii, Theel, 1886, Lesser 
Antilles, 1507 faths. 
A. danielssenii , Theel, Andaman Sea, Green Mud, 265 faths., Walsh, 
p. 202 ; A. marenzelleri, Theel, Bay of Bengal, 480-500 faths., Globigerina 
Ooze, id. p. 203. 
1 Apodogaster, n. g., for A. alcochii , n. sp. ; Walsh, p. 202, Bay of 
Bengal, 561 faths., Grey Mud. 
Benthodytes gelatinosa, Walsh, pp. 200-202, Andaman Sea, 271, 490, & 
188-200 faths., Green Mud ; B. ovalis , id. p. 200, Andaman Sea, 490 
faths., Green Mud : n. spp. 
B. papillifera, Theel, Bay of Bengal, Globigerina Ooze, 1 748 faths. ; 
Walsh, p. 200. B. sanguinolenta , Theel, Bay of Bengal, Globigerina 
Ooze, 1803 faths. ; id. p. 200. 
Caiulina caudata , Sluiter, var. ?, described by Ludwig (2), from Java. 
