504 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



as much length and the smooth shaft is about two-thirds of the total 

 length. 



The posterior end terminates in a pair of long, slender, cirriform 

 structures that are about as long as the last 10 segments. Color in life is 

 greenish yellow; in alcohol this pigment fades out. 



A. bassi is known to inhabit sandy beaches in protected bays along 

 low, intertidal zones. It is errantiate, without a tube, and probably bur- 

 rowing. It is a pleasure to dedicate this species to the late Mr. John F. 

 Bass, Jr., Founder and Director of the Bass Biological Laboratory at 

 Englewood, Florida, where the holotype individual was taken. 



After the description and figures of this species had been prepared, 2 

 individuals of this interesting species were recovered from materials 

 originating in San Francisco Bay, California. These specimens are not 

 quite complete posteriorly but their dimensions are larger than those of 

 the holotype. The larger one measures 35 mm long for 96 segments. 

 Both are somewhat darker (preserved) than the type but they agree in 

 other respects except in one feature. The distal third or fourth of the 

 everted proboscidial surface is more or less closely covered with low, wart- 

 like papillae instead of being smooth. These papillae are much smaller 

 than are the 14 terminal papillae, forming the distal circlet of the pro- 

 boscis. I can find no other significant differences in the 2 collections. It 

 may be that the warts are a result of greater age or approach to maturity, 

 since a similar phenomenon has been observed among individuals of cer- 

 tain species of Glyceridae. 



Holotype. — AHF no. 73; paratypes in the Allan Hancock 

 Foundation. 



Type locality. — Lemon Bay, southern Florida, in sandy flats at low 

 tide line. 



Distribution. — Southern Florida; Beaufort, North Carolina; San 

 Francisco Bay, California; intertidal to 8-10 fms. Associated with a 

 sandy bottom. 



Ancistrosyllis, sp. 



The collections of the Allan Hancock Foundation contain posterior 

 ends of 2 different species of this genus ; they cannot at present be allo- 

 cated to any known species. One collection with 2 posterior portions 

 originates from station 156-34 of the Velero III, from Tagus Cove, 

 Albemarle Island, Galapagos in 80-100 fms. The larger of these pieces 

 is 30 mm long and consists of 75 segments. It has short, fusiform anten- 



