232 RECENT OPHIURANS. 



This little amphiuran was found in a crevice of a fragment of coral near 

 low-water mark. Although it is no doubt immature, the arm-spines and the big, 

 spatulate mouth papillae, taken with the arm-plates and single tentacle-scale, 

 wiU serve to distinguish the species at any age. 



494. A. SERPENTINA Lutken and Mortensen, 1899. Mem. M. C. Z., 23, p. 143, pi. 8, pi. 9, f. 1, 2. 



6 specimens, including 2 cotypes of "typical form," 2 cotypes of var. a 

 and 1 COTYPE of var. 6. Gulf of Panama, 458-1020 fms. Lower Cahfornia: 

 southwest from Ballenas Bay, 645 fms. 



495. A. STEPANOVII Tscheeniawsky, 1869. Prot. Moskauer naturf. versamm., p. ? ' 



1 COTYPE. Black Sea: Sebastopol. 



496. A. STIMPSONII Lutken, 1859. Add. ad hist. Oph., pt. 2, p. 116. Koehler, 1914. Bull. 



84 U. S. N. M., pi. 7, f. 1, 2. 



6 specimens. Florida: west coast, 42 fms. ; east of Tortugas, 13 fms. Off 

 Barbados, 69 fms. Brazil: off Cape Frio, 35 fms. 



497. A. SUNDEVALLI (Mulleh and Troschel), 



Ophiolepis sundevalli Mullee and Troschel, 1842. Syst. Ast., p. 93. 



Amphiura sundevalli Ljungman, 1867. Ofv. Kongl. vet.-akad. Forh., 23, p. 320. Lutken, 1858. 

 Add. ad hist. Oph., pt. 1, pi. 2, f. 13a-6' (as A. holbolli). 



18 specimens. Spitzbehgen: Storfjord, 38^ fms.; off Shoal Point, 25-30 

 fms.; Truerenberg Bay, 70 f ms. ; Augusti Bay, 50 fms. ; Horn Sound, 17-23 fms. 

 Greenland. Labrador: 3 miles south of Caribou Island, 50 fms. Bering Strait, 

 12 fms. 



498. A. SYNTARACHA, sp. nov. {avurapaxos, perplexing). Plate 6, f. 14, 15. 



Disk 5 mm. in diameter; arms all broken but undoubtedly 50 mm. or more 

 in length. Disk scaling, close and firm around radial shields but coarser and 

 more open in center of disk and in interradial areas. Radial shields long and 

 narrow (1.3 mm. by .4=^), with inner margins straight and outer somewhat 

 convex; they are parallel and close together. Upper arm-plates elliptical, much 

 wider than long, broadly in contact. Interbrachial areas below, with scattered 

 minute scales and calcareous grains. Oral shields small, pentagonal with rounded 

 corners and widest proximally. Adoral plates relatively large, somewhat tri- 

 angular with truncated and rounded angles, not meeting either radially or inter- 

 radially. Oral papillae typical and not especially notable but the distal ones are 



' Reference quoted from Lyman. 



