158 BIOLOGICAL SURVEY OF 



Amphiuridae 

 Amphipholis Ljungman 

 A. SQUAMATA (della Chiaje). Clark, 1904, p. 560, pi. 6, figs. 

 33, 34; pi. 7, figs. 43, 44; Mortensen, 1927, p. 221, fig. 125.) 

 This species may have been confused in some cases with the 

 young of the preceding. It is definitely determined from hard 

 bottoms, depth 60 to 75 feet. Stations : D 36, 46, 56, 94. 



Ophiolepidae 



Ophiura Lamarck 



0. robusta (Ayres). Clark, 1904, p. 558, pi. 6, figs. 31, 32; 



pi. 7, figs. 39, 40; Mortensen, 1927, p. 242, figs. 84 (part), 



131 (1, 2.)) Taken twice on blue clay, depth 210 to 220 feet. 



Stations : D 15, 150. 



0. BREvispiNA (Say). (Clark, 1904, p. 558, pi. 5, figs. 28-30 ; 

 pi. 7, figs. 37, 38.) Taken on rock bottom, depth 76 feet. Sta- 

 tion: D94. 



Class ECHINOIDA Sea-urchins 

 Order DIADEMATOIDA 

 Suborder CAMARODONTA 



Strongylocentrotidae 

 Strongylocentrotus Brandt 

 S. DROBACHiENsis (0. F. Mullcr). (Clark, 1904, p. 563, pi. 9, 

 figs. 53-57 ; Mortensen, 1927, p. 313, fig. 181.) Very frequently 

 taken, often abundantly, on all kinds of bottom from the 

 shore to 100 feet. Many small ones taken (D131) on blue 

 clay, depth 194 feet. More common on hard bottoms than on 



mud. 



Order CLYPEASTROIDA 



Scutellidae 

 EcHiNARACHNius Gray 

 E. PARMA (Lamarck). Clark, 1904, p. 564, pi. 10, figs. 

 58-62.) Common and widely distributed on bottoms contain- 

 ing an admixture of sand, from shore to 70 feet. Recorded 



