N"o. 2. — Ophiiiridce and Astrophytidce of the Exploring Voyage 

 of H. M. S. " Challenger," tinder Prof. Sir Wyville Thomson, 

 F. R S. By Theodore Lyman. 



PART II. 



(Published by permission of the Lords CoMMissiONErwS of the Treasury.) 



This concluding portion of the Prodrome contains the Ophiuridaj not 

 included in Part I., and the Astrophytidse. 



There are two new genera and sixty-three new species : Amphiura, 

 19 species; Ophiocnida, 2; Amphilepis, 3; Ophiactis, 7; Ophiostigma^ 

 1 ; Ophiopholis, 1 ; Ophiochondrus, 1 ; Ophioconis, 2 ; Ophiomyces, 2 ; 

 Pectinura^ 2 ; Ophiopeza, 1 ; Ophiothrix, 4. Also of the genera already 

 treated, there have since been detected in Ophiochitoii and Ophioglypha 

 one new species each ; and in Ophiacantha, four. Of Astrophytidse there 

 are, Asti'oclon, 1 species ; Astrotoma, 1 ; Astroceras, 1 ; Astroschema, 5 ; 

 Ophiocreas, 4. 



There is added an index of the species contained in the two parts, to- 

 gether with such other species from considerable depths as I have from 

 time to time described ; the whole forming a list of the greater portion 

 of the deep-sea Ophiurans and Astrophytons now known. 



Cambridge, Mass., December 25, 1879. 



VOL. VT. — NO. 2. 



