38 University of California Publications in Zoology. [Vol.6 



and well separated, proximal margin angular, distal margin eon- 

 vex. Side arm plates meeting below. Dorsal arm plates nar- 

 rowed and truncated proximally, the distal margin produced into 

 an abtuse rounded angle. Three tapering arm spines on the 

 proximal joint, the dorsal one about as long as the arm joint. 

 On the remaining joints the dorsal spine is a little shorter than 

 the arm joint. The other two spines are shorter than the dorsal 

 spine. Color of preserved specimen grey above and white below. 



San Diego to Puget Sound, 22-600 fathoms. San Diego, M. B. L. : 1025, 

 San Clemente, 60 fathoms. 1072, La Jolla Station III, 600 fathoms. 1112. 

 1288, 2% miles S.W. by S. of La Jolla, 50 fathoms. 1497. 1501. XII-2, 

 June 5, '01, 30 fathoms. XTII-1, June 6, '01. XIV, 2, San Pedro, 100 

 fathoms. XIX, 2-5, San Pedro, 77 fathoms. XX, 1, San Pedro 77, fathoms. 

 XXI-2, June 20, '01. 43 fathoms. XXVI-'a. XXXI-a, near Potts Valley, 

 San Pedro. L-l and 2, off Pt. Loma, 25 fathoms. LV-1 and 2, San Diego, 

 25 fathoms. LXX -5, La Jolla, submerged valley, 100 fathoms. LXXII-1, 

 off Pt. Loma, 30 fathoms. Smithsonian : 5214 Catalina. 



Ophiura kofoidi sp. now 



Figs. 8, 9. 



Diameter of disc 7% mm. Length of arm about four times 

 diameter of disc. Disc thick but flat, pentagonal, covered with 

 imbricated scales and radial shields. A large central scale. A 

 notch over base of arm bordered by two rows of spines, one row 

 being continued along genital opening. Five to six pairs of 

 mouth papillae, the innermost sometimes spine-like. Teeth. No 

 tooth papillae. Mouth shields large, pear shaped, the stem of 

 the pear being a sharp angle pointing inward. Side mouth 

 shields, narrow, meeting within. Genital openings starting be- 

 tween mouth shield and side mouth shields. First tentacle pore 

 opening diagonally into mouth angle and surrounded by nine 

 scales, second (in 1st arm joint) surrounded by six scales, the 

 remainder each with two spine-like scales. Ventral arm plates 

 short and well separated, convex distally. produced to a point 

 proximally. Side arm plates meeting below. Dorsal arm plates 

 broader than long in proximal part of arm, distal margin convex. 

 narrowed proximally. Arm spines numerous, slender, acute, 

 slightly curved, cm the proximal joints the dorsal spines are 2i/o 

 times length of arm joint, the ventral spines a little longer than 



