EEPOET ON THE ASTEROIDEA. 363 



Localities. — Station 150. Between Kerguelen Island and Heard Island. February 2, 

 1874. Lat, 52° 4' 0" S., long. 71° 22' 0" E. Depth 150 fathoms. Coarse gravel. Bottom 

 temperature 35°'2 Falir. ; surface temperature 37° - 5 Fahr. 



Station 151. Off Heard Island. February 7, 1874. Lat. 52° 59' 30" S., long. 73° 

 33' 30" E. Depth 75 fathoms. Volcanic mud. Surface temperature 36° "2 Fahr. 



Station 191. Off the Arrou Islands. September 23, 1874. Lat, 5° 41' 0" S., long. 

 134° 4' 30" E. Depth 800 fathoms. Green mud. Bottom temperature 39"-5 Fahr. ; 

 surface temperature 8 2° "2 Fahr. 



5. Porania magellanica, Studer (PI. LIX. fig. 5). 



Porania mageUanica, Studer, 1876, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, Jul}', p. 459. 

 ? Porania patagonica, Perrier, 1878, Nouv. Archives Mus. Hist. Nat., 2e S6rie, t. i. pp. 27, 50, 85. 

 Porania magelhaenica, Studer, 1884, Anhang z. d. Abhandl. d. k. preuss. Akad. d. Wiss. Berlin, 

 vom Jahre 1884, p. 42. 



Locality. — Station 304. South of Port Otway, Gulf of Penas. December 31, 1875. 

 Lat. 46° 53' 15" S., long. 75° 12' 0" W. Depth 45 fathoms. Green sand. Surface 

 temperature 57° - 2 Fahr. 



Remarks. — Examples of a form which I refer to this species were collected off the 

 western coast of Patagonia. Structurally these specimens are nearly allied to Porania 

 antarctica, but the general facies is distinctly different. They accord closely in every 

 respect with the description of Porania magellanica, but as I have not had an opportunity 

 of examining the types of that species, and as Professor Studer's diagnosis is somewhat 

 short and insufficient for this difficult crenus, I sent a drawing to him of one of the 

 Challenger specimens, and immediatehy received the reply that he had no doubt whatever 

 as to the species being Porania magellanica. 



Through the kindness of Professor Perrier I had the good fortune to see a specimen 

 from the Strait of Magellan to which he has given the name of Porania patagonica (but 

 of which no description is yet published). So far as I can judge from the brief notes 

 made at the time, and without actually comparing specimens side by side, I believe this to 

 be the same form. Studer 1 has also expressed a similar opinion. A number of the 

 marginal plates within the disk area in the Challenger specimens may bear two spinelets, 

 equal in size, and placed side by side or slightly obliquely, and often appearing like one 

 split into two ; and in a large specimen two or three plates at the summit of the inter- 

 brachial arc may have as many as three. The character appears to be constant in the 

 examples collected by the Challenger, and Professor Studer informs me that a similar 

 doubling of the lateral spines occurred in his examples from the Strait of Magellan 

 (Tuesday Harbour). 



1 Anhang z. d. Abhandl d. I: preuss. Akad. d. Wiss. Berlin, vom Jabre 1884, p. 42. 



