214 



Fishery Bulletin 89(2). 1991 



YOLK 



c 



Figure 2 



Camera lucida drawings of the young of Sagamichthys abei: (A) M13-1A, 16-mm larva; (B) SIO66-390, 14-mm transitional specimen; 

 (C) M7 Sta 3, 16-mm juvenile. 00 = orbital organ; GO., = posterior gular organ; SBO = subopercular organ; IVO = intraventral organ. 



and posterior gular photophore (G0 2 ), with light pig- 

 mentation in the mouth, gill chamber, and on the dor- 

 sal region of the yolksac. 



In the transitional specimen, the mouth, stomach 

 cavity, and intestine are lined with black tissue. These 

 blackened areas show through the translucent muscu- 



lature, darkening the ventral half of the head and body 

 anterior to the vent. Muscles between the anal and dor- 

 sal fins take on a bluish-black tinge, which spreads 

 anteriorly and posteriorly from that area in larger in- 

 dividuals, with the area around the caudal peduncle 

 darkening last. Among the more advanced transitional 



