226 University of California Publications in Zoolo(j]j [Vol. 13 



Hydroides sp. (?) 



A number of tubes marked "yacht bottom, Honolulu," were in 

 the collection, and contained specimens of Hydroides too poorly pre- 

 served to admit of an examination of the soft parts. Collar setae are 

 of two kinds. One (pi. 12, fig. 47) has a stout base, divided distally 

 into three branches. Two of these are very short and stout while the 

 other is a long slender process. None were entire, but apparently the 

 end is rounded rather than pointed. The second kind of seta is long 

 and slender, very gradually tapering to an acute tip with a narrow 

 and much striated wing along one edge. The uncinus is of usual 

 form and has six or seven teeth. 



The basal plate of the operculum has thirty-two acute, conical, and 

 sharp-pointed teeth around its edge. The terminal plate is very 

 prominent and has thirteen arm-like expansions, each prolonged at its 

 apex into a crescent-shaped expansion (pi. 12, fig. 48). 



Apomatus geniculata Moore 



Apomatus geniculata Moore (1904), p. 168, pi. 11, figs. 17, 18; pi. 12, 

 fig. 38. 



Collected in haul 1552, off San Clemente Island in 50 fathoms on 



coarse sand. 



Protula atj^ha Bush 



Protula atypha Bush (1904), p. 228, pi. 37, figs. 1, 2, 4. 

 Collected in the following hauls : XII-1, off San Pedro in 40 to 145 

 fathoms on green mud and sand; XXXV, off Ballast Point, Santa 

 Catalina Island in 6 to 30 fathoms on green mud; LXXXII-1, off 

 Point Firmin in 27 to 30 fathoms on fine gray sand. 



Spirabranchus quadricornis Grube 



Spirabranchus quadricornis Grube (1878), p. 275, pi. 15, fig. 6. 

 Collected from San Pedro; Avalon, Santa Catalina Island; La 

 Jolla; and San Clemente Island. 



Crucigera zygophora Johnson 



Crucigera zygopJiora Johnson (1901), p. 433, pi. 19, figs. 205-208. 

 Collected from Sitka Harbor, Alaska; and Santa Barbara. 



