1909] McClendon: Th< Ophiurans of tJu San Diego Region. 43 



Sub-genus Amphiura Verrill 1899. 

 One apical or sub-apical mouth papilla. One (rarely 2) small, 

 distal papilla (oral tentacle scale). Middle of jaw edge without 

 papillae. Mouth slits gaping. Four to seven or more (rarely 3) 

 arm spines. Radial shields divergent. 



Amphiura verrilli sp. nov. 

 Figs. 10, 11. 



Diameter of disc S mm. Length of arm five times diameter 

 of disc. Disc above and below covered with imbricated scales. 

 Radial shields naked, separated, and about twice as Long as broad. 

 Three pairs of mouth papillae. Teeth. No tooth papillae. Month 

 shield diamond shaped, the edges next to the genital openings 

 concave, corners rounded. Side month shields narrowed and 

 meeting within, broad without. Genital openings beginning at 

 mouth shields. One flat tentacle scale. Ventral arm plates con- 

 cave mi distal margin, narrowed proximally. Side arm plates 

 meeting above, meeting below except at base of arm. Dorsal 

 arm plates elliptical, about twice as broad as long. Four stout 

 tapering arm spines, a little longer than arm joints. Color of 

 dried specimen light grey. 



San Diego, M. B. L. : San Diego, 100 fathoms. XXXI-a, near Potts 

 Valley. San Pedro. 



Sub-genus Amphipholis Ljg. 1867-71. 

 Two small lateral and one broad operculiform distal mouth 

 papillae, forming a continuous series along the entire jaw and 

 capable of nearly or quite closing the mouth slits. Radial shields 

 in close contact. Disc covered with scales (usually naked). 



Amphipholis pugetana Ly. 



Figs. 12, 13. 

 Proc. Bos. Soc. Nat. Hist., VII, p. 193, 1868. 



Diameter of disc 3 1 /. mm. Length of arm about five times 

 diameter of disc. Disc covered with imbricated scales, the dorsal 

 ones longer and meeting those on the edge in a distinct line. 

 Radial shields naked, about twice as long as broad, meeting- along 

 their whole length. Three pairs of mouth papillae, the outer 



