188 



THE OPIIIURIDiE. 



Numerous specimens from Stations 3363, 695 f. ; 3406, 551 f. • 3410 

 331 f. ; and 3429, 919 f. 



This species is closely related to A. clavigera Verr., from which it seems 

 to differ only in the character of the granulation. {A, davigcra is '' covered 

 with small smooth granules.") These two species and A. intedum Lym. differ 

 from all the other species in the under side being destitute of granulatio 



a 



I 



66. Gorgonocephalus Diomedese n. 



Plate XXI. Fig. 5, Plate XXII. Fig. 1. 



sp, 



Diameter of disk, 50 mm. Distance from the outer end of the mouth 

 slit to the first bifurcation, 21 mm., from the first to the second bifurcation 

 about 15 mm., but the length between the twigs begins to be rather variable 

 from the first. The dorsal side of the disk beset with stout, acute spines, 

 about 1-li mm. long, especially on the radial shields, which form high ribs. 

 The ventral side also is beset with spines, somewhat shorter than those of 

 the dorsal side ; along the genital slit they form a rather distinct row of 

 papillae. The arms are fointly granulated, the finer twi^^s with rincrs of 

 hooks, which lie more or less regularly alternately proximally or distally 

 directed. 3-4 arm-spines (tentacle scales) ; none at the first pore. 



One specimen from Station 3353, 695 f. It is evidently abnormal, one 

 half of the disk (and the arms of that part) being much larger than the 

 other ; also the spines of the disk are much more developed on the large 

 half than on the other. 



/ 



■ -- ^ 



List of the Ophiuridsa of the "Albatross" Expedition, arranged 



by Stations. 



Station 3353, Lat. T & W ^., Long. 80^ 34' W., 695 fathoms. Bottom temperature 



3°. 89 a 



Amphiura polyacantlia. 

 Ophiacantha costata. 

 Astroscliema sublEeve. 

 Gorgonocephalus Diomede^. 



'■ i'. 



>i 



Station 3354, Lat. 7° 9' 45'^ N., Long. 80^ 50' W., 322 fathoms 

 7° .78 C. 



Ophiochiton carinatus. 



Asteronyx dispar. 



Bottom temperature 





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