THE APODOTJS HOLOTHUEIANS 119 



DISTEIBUTION. Reported from Calbuco, Porto Lagunas (Chonos Archipel- 

 ago) ; Punta Arenas and Susanna Cove (Magellan Strait), Chile (Ludwig) ; 

 Port Bridge, Tierra del Fuego (Ludwig) ; Orange Bay and Punta Arenas, 

 Chile (R. Perrier); and Falkland Islands (Theel). Apparently ranges on both 

 coasts of South America and among the neighboring islands to about 42 S. 

 lat 



REMARKS. This species is of particular interest because, although quite dif- 

 ferent from its southern allies, it is strikingly similar to the widely distributed 

 northern species, Icevis. Curiously enough, Ludwig does not in any of his 

 several papers ('866, '98&, and '98c) make any reference to this similarity, and 

 yet it is quite noticeable. Indeed, it is hard to draw any sharp line between the 

 two species, although pisanii is apparently redder, with fewer and larger wheel- 

 papillae and polian vessels, and oftentimes has minute oval calcareous grains 

 in the longitudinal muscles. The southern specie^ occurs in sand or mud along 

 shore or out to a depth of about 100 m. 



CHIEIDOTA L.EVIS. 



Holothuria Icevis Fabricius, 1780, p. 353. 



Holothuria pellucida Vahl in 0. F. Miiller, 1806, p. 17. 



Chiridota Icevis Grube, 1851, p. 41. 



Trochinus pallidus Ayres, 1852c, p. 243. 



Chirodota tigillum Selenka, 1867, p. 366. 



Chirodoia typica Selenka, 1867, p. 366. 



Chirodota Icevis Duncan and Sladen, 1881, p. 12; pi. i, figs. 14-19. 



Chirodota lave Lockington, 1885, p. 180. 



Chirodota abyssicola von Marenzeller, 1893, p. 19; pi. i, fig. 5. 



LENGTH. Up to 200 mm., but usually 50-100. 



COLOR. Usually pinkish, sometimes bright pink, sometimes pinkish brown, 

 sometimes nearly transparent and colorless, rarely grayish or yellowish. 



DISTRIBUTION. Reported from numerous stations on the east coast of 

 America from 42 N. lat. northward; from Greenland, from Spitzbergen, and 

 from the northern coasts of Europe above 66 N. lat. Concerning its oc- 

 currence in the Pacific Ocean, see antea, p. 28. The bathymetrical range in 

 the North Atlantic is commonly from low water to about 100 m., but von 

 Marenzeller 's abyssicola was taken in 2,870 m., north of the Azores, and speci- 

 mens from the Pacific were taken in over 3,000 m. 



REMARKS. The large series of specimens of a Chiridota, apparently this 

 species, discussed on p. 28, shows that Icevis has either not yet been clearly and 

 accurately defined, or else has a remarkable geographical and bathymetrical 

 range. It is entirely distinct from the following species, but in the present state 

 of our knowledge it is surprisingly hard to draw a sharp line between them. 

 No constant character by which to distinguish the deep-water forms has yet 



