(Schwed. Südpolar-Exp. 
40 TH. MORTENSEN, 
Stat. 2 (37° 50' S. 56° ii' W. 100 m.; Coast of North Argentina); several specimens. 
» 3 (54° 43' S. 64^8' W. 36 m.; Tierra del Fuego); several specimens. 
» 5 (64°20'S. 56’38'W. 150 m.; Graham Region, S.E. of Seymour Isl.). 1 specimen. 
» U (54°50'S. 68° 16' W.; shallow water; Tierra del Fuego); several small specimens. 
» 14 (54° 49' S. 68° 17' W.; shallow water; Tierra del Fuego); 1 small specimen. 
» 44 (5C32' S. 58° 10' W.; just outside the Macrocystis zone; Falkland Isl.); 
6 large specimens. 
» 55 (52° ii' S. 6o° 26' W. 40 m. Falkland Isl., Port Albemarle); 1 specimen. 
» 58 (52 0 29 ' S. 6o° 36' W. 197 m. S. of West Falkland); 1 specimen. 
* 59 ( 53 ° 45 ' S. 6i° 10' W. 137 — 150 m. Burdwood Bank); 1 specimen. 
» 60 (55 0 10' S. 66° 15' W. 100 m.; East end of Beagle Channel); 1 specimen. 
Further there is a considerable number of specimens from the Swedish Expedi- 
tion to Tierra del Fuego, 1895 — 96, viz. from the localities Puerto Madryn, Punta 
Arenas, Hope Harbour, Puerto Churruca, Isthmus Bay, Fortescue Bay, Borja Bay, 
Isla Nueva & Navarino, Quarenta Dias Katamish niaia, Puerto Angosto, Ultima 
Esperanza, from low water mark to 30 fathoms. 
The bottom on the different localities named above is mostly hard bottom with algæ. 
The geographical distribution of the species, as far as known, is: the South 
American coast, up to the mouth of the La Plata on the Atlantic side, and to 
Ancon, Peru, on the Pacific side 1 ; the Falkland Islands, Gough Island, the Kerguelen 
group, New Amsterdam. The other localities given in the »Challenger» Echinoidea 
p. 214, viz. Cape of Good Hope, Australia and New Zealand, are incorrect, relying 
upon incorrect determinations (cf. »Ingolf» Echinoidea I. p. 104; DÖDERLEIN, Echi- 
noidea d. deutschen Tiefsee-Expedition, p. 227). 2 
The bathymetrical distribution is from shallow water down to ca. 300 m.; but 
it is, evidently, essentially a shallow water species, and the records of its occurrence 
in depths greater than ca. 300 m. might deserve a renewed careful examination, 
viz. the »Challenger» Stations 145, Prince Edwards Island, 310 — 315 fathoms and 
147 — 1600 fathoms; especially the latter seems very improbable. (The depth 
590 m. given in the Echinoidea of the German South Polar Expedition p. 105 rests 
on the »Challenger» station 145.) 
1 Rathbun, Catal. of Echini in the U. S. Nat. Museum. Proc. U. S. Nat. Mus. 1886 p. 278. 
2 I have not succeeded in finding any evidence for the locality Cape of Good Hope given in the 
place cited in the »Challenger» Echinoidea. 
After the above was printed I received from Professor Benham, Otago, a specimen labelled Echimis 
angulosus from Stewart Island. It proved to have nothing with Protocentrotus angulosus (Leske) to do, but 
evidently belongs to the genus Notechinns , representing a new species, which I cannot, however, describe 
after the insufficient material in hand. It thus becomes probable that some of the statements of the occur- 
rence at New Zealand of Notechinns ?nagellanicus are based upon this species. The occurrence at New Zealand 
of a species of Notechinns , allied to the Patagonian N. rnagellanicits, is a fact of considerable interest from 
a zoogeographical point of view. 
