318 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 7 



PLATE 46 



Figures 17 to 21, Spiophanes missionensis : Fig. 17, anterior end in 

 dorsal view, palpi removed, some setae indicated, x 32; Fig. 18, 

 a tridentate hook from a posterior parapodium, x 650; Fig. 19, 

 outline of egg from adult in May, enlarged; Fig. 20, posterior 

 end in left lateral vievp, with long paired cirri and short median 

 papilla, X 32; Fig. 21, first parapodium from left side in ante- 

 rior view, showing position of heavy spine in neuropodium, x 65. 



Figures 22 to 28, Boccardia prohoscidea: Fig. 22, anterior end in dor- 

 sal view with most of left palpus removed, x 12 ; Fig. 23, same, 

 in ventral view, x 12; Fig. 24, a pair of modified spines from 

 modified fifth segment from a young, recently settled stage, x 650 ; 

 Fig. 25, early larva from capsule, in left lateral view, enlarged; 

 Fig. 26, capsule with 3 remaining larvae in which cannibalism 

 has taken place, enlarged; Fig. 27, diagram illustrating possible 

 method of cocoon formation near the close of the process, the 

 body in cross section shown applied to the points of closure of 

 the cocoon (after Soderstrom) ; Fig. 28, several capsules attached 

 to wall of tube of adult, slightly enlarged. 



