1909] McClendon: The pit in runs of tlir San Di<<i<> Rt<rit>n. 47 



mouth shield. Two very short, flat tentacle scales. Ventral arm 

 plates rectangular with the corners cut off and the distal margin 

 concave, longer than broad. Dorsal arm plates oval, and broader 

 than long except at base of arm. Five to six stout, tapering arm 

 spines, almost as long as arm joint. Color (preserved): arm 

 yellowish, disc greenish. 



San Diego M. B. L. : XXI-5, June 21, 1901, about 150 fathoms; XXXIV- 

 a, up Little Harbor Valley, .June 28, 1901. LXXIII-1, off Point Loma, July 

 25, 1901, 120 fathoms. 



Genus Ophionereis Ltk. 1859. 



Disc covered with fine, overlapping scales. Radial shields 

 nearly hidden by scales. Large, oblong teeth. Mouth angle small 

 and short and bearing 9-10 small, close-set papillae. A few (3-5) 

 short, smooth arm spines. One large tentacle scale. Each upper 

 arm plate has a supplementary piece on either side. Two genital 

 openings beginning outside the mouth shield. 



Ophionereis annulata Le Conte. 



Figs. 36, 37. 

 Proe. Acad. X. Se. Phila., V, p. 317, 1851. 



Diameter of disc 13 mm. Length of arm about six times 

 diameter of disc. Disc puffed in interbrachial spaces and cov- 

 ered with minute imbricated scales which nearly hide the radial 

 shields. Mouth papillae, 5 pairs on each jaw and one pair in the 

 mouth angle. Teeth. No tooth papillae. Mouth shields hex- 

 agonal. Side mouth shields narrowed and meeting within. Gen- 

 ital openings beginning at the mouth shield. One flat oval ten- 

 tacle scale. Ventral arm plates square, corners rounded, distal 

 margin concave. Dorsal arm plates rounded and narrowed dis- 

 tally. Three stout, flattened arm spines tapering distally. about 

 l!/2 times the length of arm joint, dorsal spine shorter than the 

 others. 



West coast of Central America to San Pedro, shore to 35 fathoms. San 

 Diego M. B. L.: VIII, San Pedro Harbor, May 29, 1901. XLIV-1, Quar- 

 antine Station to Beacon 3%, San Diego, 5 fathoms. LXVI-1, Beacon 5 to 

 3V., along north side of channel, San Diego, 8 fathoms. Whites Point, San 

 Pedro, June 4, 1901. U. S. N. M.: No. 5, Henry Hemphill, San Diego. 

 U. S. F. C. : San Diego. Albatross : Sta. 3620, San Diego Bay. 



