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University of Washington Publications in Biology 



[Vol. 2. 



10b. No occipital pit as above. 



11a. Cheek below suborbital crest naked, without plates; 

 only 1 spine developed on preopercular margin ; gill 

 membrane with a wide free fold ; 3 to 5 spines on 

 eyeball ; spinous dorsal with distal margin of mem- 

 brane black. Range : Washington to San Diego, 

 California. Marine. Common. 

 279. Xeno pyxis latifrons (Gilbert) 



lib. Cheek below suborbital crest with 3 plates; 2 pre- 

 opercular spines developed ; gill membranes without 

 free fold ; no spines on eyeball. Range : Washington 

 to off San Diego. Marine. Common. 

 280. Xcncretmus triacanthus (Gilbert) 



9b. Upright spines on rostral plate 3, besides the 2 lateral 

 ones. 



Fig. 46. A dorsal view of Odontopyxis trispinosus. 



Fig. 47. The rostral plate of Asterotheca infraspinata. 



Fig. 48. The rostral plate of Averruncus emmelane. 



Fig. 49. A cross-section of the plates in the region of the caudal peduncle. 



Fig. SO. A cross-section of the plates in the region of the dorsal fin. 



Diagrams showing the anatomical features of the sea poachers, Agonidae. Drawn by 



Arthur D. Welander. 



Do — dorsal fin; Do La — dorsal lateral series of plates; Do Sr — dorsal series of 

 plates; Lo La — lower lateral series of plates; Nas Sp — nasal spines; Oc P — occipital pit; 

 Pre — preorbital; Ros PI — rostral plate; Up La — upper lateral series of plates; Ve Lat — 

 ventral lateral series of plates. 



