208 U7iwersity of California Publications in Zoolorjjj [Vol. 13 



Thelepus hamatus Moore 



Thelepus hamatus Moore (1905c), p. 856, pi. 44, figs. 16-18. 

 Collected in haul XXVI-1, off Santa Catalina Island in 46 to 49 

 fathoms on sand. 



Pista alata Moore 



Pista alata Moore (1909a), p. 273, pi. 9, figs. 48-51. 

 Collected from San Pedro; San Diego; and San Clemente Island. 

 Collected also in the following hauls : XIV-1, off San Pedro in 40 to 

 155 fathoms on soft sticky mud; XIX-1, off San Pedro in 30 to 100 

 fathoms on soft mud, sand, and pebbles; L-1, off San Diego on a 

 rocky bottom in 21 to 28 fathoms; 1102, off La Jolla in 15 to 35 fathoms 

 on sand, mud, and broken shells; 1157, off La Jolla in 160 fathoms 

 on green mud. 



Pista elongata Moore 



Pista elongata Moore (1909a), p. 270, pi. 9, figs. 45-47. 

 Collected from San Diego and San Clemente Island. 



Pista typha Grube 



Pista typha Grube (1878), p. 232, pi. 12, fig. 4. 

 Collected in haul 1157, off La Jolla in 160 fathoms on green mud. 



Pista sp.(?) 

 Collected in haul LXX-5, off La Jolla in 54 to 118 fathoms on mud 

 and soft black shale; and in haul LXX-6, off La Jolla in 54 to 125 

 fathoms on mud, sand, and soft black shale. 



Polycirrus californicus Moore 



Polyeirrus californicus Moore (1909a), p. 276, pi. 9, figs. 52-53. 

 Collected from Portuguese Bend ; San Pedro ; and Coronado. 



Streblosoma crassibranchia sp. nov. 



PI. 12, figs. 30, 31 

 The definition of this species is provisional, for it depends upon 

 a single imperfect specimen. Its total length was twelve millimeters 

 and its greatest width not more than one millimeter. 



