40 TH. MORTENSEN, (Schwed. Sudpolar-Exp. 



Stat. 2 (37 50' S. 56° 11' 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. 

 » 13 (54'50'S. 68° 16' W.; shallowwater; Tierra del Fuego); several small specimens. 

 » 14 (54° 49' S. 68° 17' W.; shallow water; Tierra del Fuego); 1 small specimen. 

 » 44(5i°32'S. 58° 10' W.; just outside the Macrocystis zone; Falkland Isl.); 

 6 large specimens. 



» 55 (52' 11' S. 60 26' W. 40 m. Falkland Isl., Port Albemarle); 1 specimen. 



» 58 (52°2o/ S. 60" 36' W. 197 m. S. of West Falkland); 1 specimen. 



' 59 (53° 45' S. 61° 10' W. 137 — 150 m. Burdwood Bank); 1 specimen. 



» 60 (55 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, Ouarenta 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 algae. 

 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; DODERLEIN, 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. Ptoc. 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 Echinus 

 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 magellanicus are based upon this species. The occurrence at New Zealand 

 of a species of Notechinns, allied to the Patagonian N. magellanicus, is a fact of considerable interest from 

 a zoogeographical point of view. 



