No. 7. — Ophiuride and Astrophytide of the Exploring Voyage of 
H. M.S.“ Challenger," under Pror. Sir WyviLLE THOMSON, F. R.S. 
By THEODORE Lyman. 
PARTI, 
(Published by permission of the LORDS COMMISSIONERS OF THE TREASURY.) 
In order that persons who are interested in Echinodermata 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 Ophiuride and Astrophytide, with a simple outline 
figure-of each. Part I, contains thirteen new genera and ninety-six new 
species, to wit: Op/wocten, 4 species ; Ophioglypha, 35 ; Ophiomastus, 1 ; 
Ophioplinthus, 2; Ophiomusium, 12; Ophiopyrgus, 1; Ophiernus, 1; 
Ophioceramis (1), 2; Ophiozona, 4; Ophiotrochus, 1 ; Ophiophyllum, 1; 
Ophiobyrsa, Y; Ophiochiton, Y; Ophiopyren, 2; Ophiacantha, 16 ; Ophio- 
thamnus, 1; Ophiomitra, 4; Ophiocamax, 1; Ophiolebes, 2 ; Ophiosci- 
asma, 1; Ophiogeron, 1; Ophioscolex, 2. 
Part IL will contain the remaining Ophiuride and the Astrophy- 
tide. 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, 
“ 905-321, Patagonia to Buenos Ayres. 
* 822-354, Buenos Ayres to the Azores, 
CAMBRIDGE, Mass., July 25, 1878. 
