Plate 67 



Orthasti Has koehleri 



Fig. 1. Actinal view nf three inferomarginal plates and adjacent actinal (A) and adambulacral 

 plates from a specimen (forma montereyensis) taken near Monterey Bay, California; 

 near base of ray which is to left, > 8. 1". .Same specimen; skeleton of ray between 

 carinal (C) and inferomarginal i/i plates, inclusive; base of raj to left, X4. The 

 proximal superomarginal plates of this specimen are spiniferous on alternate plates 

 only. 



2. Forma h plush/In, station 4233. A dorsolateral spine, 3 mm., ■ 8 and tip of same X20. 2a- 



A dorsolateral spine, 2.1 mm. from specimen from 1(10 fathoms, Straits nf Fuca (station 

 34451, • S. 2/'. Same spine, ■ 25. 2c. Type of forma, station .14 1:!. a dorsolateral 

 spine for comparison, X8. 



3. 3a. Forma montereyensis, Monterey Bay and vicinity, abactinal spines, X8. 



4. Forma koehleri, station 4202, described in text; two dorsolateral spines 4.5 and 5 mm., X 10. 



5. Forma biordinata, Port Renfrew, British Columbia; two dorsolateral spines, 8. 

 li. Forma koehleri, deep water, station 4431; two dorsolateral spines, X8. 



7. Forma koehleri, very large specimen, station 3466 (see pi. 68, fig. 1); dorsolateral spine, X 8. 

 7<i and 76. Same specimen; inner (7a) and outer inferomarginal spines, show ing grow I h 

 due to age. 

 22S 



