REPORT ON THE ASTEROIDEA. 



399 



/S. Baihymetrical range : 30 to 450 fathoms. 



y. Nature of the Sea-bottom : Chwtaster longipes on coral reefs and on volcanic mud. 



The localities of Chsetaster hermanni, Miiller and Troschel, and Chwtaster trosehelii 

 (Valenciennes MS.), Miiller and Troschel, are unknown. The type of the latter species 

 is lost, and I consider that the name should be discarded. I am in great doubt as to 

 whether either of these forms could be referred to the genus Chastaster established on the 

 basis of Chtetaster longipes. 



Chorological Synopsis of the Species herein mentioned. 



1. Chsetaster longipes (Retzius), Sars. 



Asterias longipes, Retzius, 1805, Diss. sist. spec. cog. Asteriarum, p. 20. 



Asterias subulata, Lamarck, 1816, Hist. nat. anim. s. vert., t. ii. p. 568. < 



Chxtaster subulata, Miiller and Troschel, 1840 (April), Monatsber. d. k. preuss. Akad. d. Wiss. Berlin 



p. 103; System der Asteriden, 1842. p. 27. 

 1 Astrqpecten (Astropus) longipes, Gray, 1840 (Nov.), Ann. and Mag. Nat. Hist., vol. vi. p. 182 



Synop. Spec. Start. Brit. Mus., 1866, p. 4. 

 Nepanthia lessellata, Gray, 1840 (Dec), Ann. and Mag. Nat. Hist., vol. vi. p. 287 ; Synop. Spec 



Start. Brit. Mus., 1866, p. 15. 

 Chxtaster longipes, Sars, 1857, Bidrag til KundskaLen om Middelhavets Littoral-Fauna, p. 107. 



Localities. — Station 75. Between the Islands of Fayal and San Jorge, Azores. July 

 2, 1873. Lat. 38° 38' 0" N., long. 28° 28' 30" W. Depth 450 fathoms. Volcanic mud. 

 Surface temperature 70° - Fahr. 



Station 36. Off Bermuda. April 22, 1873. Lat. 32° 7' 25" N., long. 65° 4' 0" W. 

 Depth 30 fathoms. Coral. Surface temperature 67°'5 Fahr. 



" Porcupine " Expedition : 



A single example. Locality and depth not recorded. 



Remarks. — All the examples collected at the above-mentioned stations are of smaller 

 habit than that usual in full-grown specimens from the Mediterranean. A number of the 

 examples from Station 36 have here and there tubercular enlargements of the paxillae, 

 which recall the knobs present in Chxtaster nodosus, Perrier, and appear to me to be of the 

 same character. In Cha'tasfcr nodosus the knobs are very numerous, aud present a con- 

 spicuous facies, which led me to regard M. Perriers example as a well-marked form wdien 

 I had the privilege of examining it in his laboratory in Paris. 



