No. 7. — Ophiuridcc and Astrophytidce of the Exploring Voyage of 

 H.M.S. "Challenger" uTidcr Pkof. SirWyville Thomson, F.RS. 

 By Theodore Lyman. 



PART I. 



(Published by permission of the Lords Commissioners of the Trea.st7RY.) 



In order that persons who are interested in Echinod^rmata may get 

 early information, and to secure a just priority of discovery to the 

 " Challenger " expedition, this Prodrome is printed. 



It will be in two parts, and will contain descriptions of all new gen- 

 era and species of Ophiuridaj and Astrophytidse, with a simple outline 

 figure of each. Part I. contains thirteen new genera and ninety-six new 

 species, to wit : Ophiocten, 4 species ; Ophioglypha, 35 ; Ojjhiomastus, 1 ; 

 Oj^htoplinthiis, 2; Ophiomusium, 12; Oj)hiopyrgus, 1; Ophiernus, \ ; 

 Ophioceramis (])^ 2 ; Ophiozona, 4 ; Opkiotrochus, 1 ; Ophiophyllitm, 1 ; 

 Ophiohyrsa, 1 ; Ophiochiton, 1 ; Ophiopijren, 2 ; Ophiacantlia, 1 6 ; Ophio- 

 thamnus, 1 ; Ophiomitra, 4 ; Ophlocamax, 1 ; Ophiolebes, 2 ; Oj)hiosci- 

 asma, 1 ■; Ophiogeron, 1 ; Ophioscolex, 2. 



Part II. will contain the remaining Ophiuridre and the Astrophy- 

 tidse. All matters beyond those of description will be reserved for 

 the more important work to be published by the British Government. 



The following courses will give a general notion of the position of 

 the dredging stations : — 



Stations 1- 24, Canaries to West Indies. 



" 25- 58, West Indies to Halifax. 



" 59- 83, Bermuda to Madeira. 



" 84-128, Madeira to Brazil. 



" 129-140, Brazil to Cape of Good Hope. 



" 141-161, Cape of Good Hope to South Australia by Antarctic Circle. 



" 162-237, Australia, by Philippines, to Japan. 



" 238-260, Japan to Sandwich Islands. 



" 261-304, Sandwich Islands to Patagonia. 



" 305-321, Patagonia to Buenos Ayres. 



" 322-354, Buenos Ayres to the Azores. 



Cambridge, Mass., July 25, 1873. 



