WOLFF: BEAK KEY FOR EIGHT CEPHALOPOD SPECIES 



6a. RL/JW M.lll (CI 05 = 1.161±0.032) 7 



6b. RL/JW <l.lll(CIo5 = 1.061+0.032); *RL/HL <0.322 (CI05 = 0.309+0.011); *RL/CL 



<0.266 (CI05 = 0.252+0.008) Ommastrepkes bartramii 



Jaw angle deeply recessed; wing base inserted % down anterior margin of lateral wall; 



two pigment stripes present as in Dosidicus gigas (Fig. 2), remain in beaks with 



URL >0.60 cm; pigmentation in lateral wall is absent in beaks with URL <0.60 cm; 



other pigment changes with growth shown in Figure 8. 



1 1 



2 mm 



Figure 8.— The upper and lower beak of Ommastrephes bar- 

 ^ramu (1- ML =85 mm, URL=0.15cm,LRL = 0.15 cm; 2- ML = 

 140 mm. URL = 0.28 cm, LRL =0.31 cm; 3 - ML = 165 mm, URL 

 = 0.40 cm, LRL = 0.41 cm). 



7a. 



HL/CL >0.825 (CI 05 = 0.838+0.013); *RL/HL <0.344 (CIos = 0.334+0.011); **RL/ 

 JW<1.188 (CIos = 1.161+0.032) Dosidicus gigas 



Jaw angle deeply recessed; wing base inserted x / 2 way down anterior margin of lateral 

 wall; two pigment stripes extend from the inner surface of the rostrum posteriorly 

 onto the inner surface of the crest (Fig. 2) 3 ; ridges and grooves more prominent than 



3 Rancurel, P. 1980. Note pour servir a la connaissance de Symplectoteuthisoualaniensis(Lesson 1830) (Cephalopoda, Oegopsi- 

 da) : Variations ontogeniques du bee superieur. Cahiers de L'Indo-Pacifique 2(2):21 7-232. 



365 



