IN PORICHTHYS. 45 



The occipital rows(o) lie on either side of the two dor- 

 sal spines. Each row consists of several pairs of organs, 

 each pair with a mucous pore between the two minute or- 

 gans that compose it. 



The frontal rows (/) are double, the inner row of either 

 side being about half as long as the outer. In both inner 

 and outer there is that alternation of organs and pores not- 

 ed above. The curved postorbital row (po) runs backward 

 and downward from behind the eye, in front joining the 

 orbitoral(oo), running downward from the eye to the angle 

 of the mouth. The angular (aa) runs backward from the 

 angle of the mouth. These rows are all short and single. 



Between the postorbital and the lateral is the curved 

 scapular row (s) which in some specimens bends upward 

 toward the dorsal and is then prolonged along the back 

 to form a second dorsal row consisting of phosphorescent 

 organs and mucous pores arranged as in the occipital row. 



The opercular rows (oj?), two in number, occur on the 

 operculum, in general parallel to its free margin. The 

 posterior half of the lower row is wholly of mucons pores. 

 The pectoral (p ) curves around the front side of the base 

 of the pectoral fin joining the gastric (ga) below, the latter 

 running back to the level of the anal fin. The mandibu- 

 lar (md) follows the curve of the lower jaw. Inside this, 

 and extending back on either side to near the hinder oper- 

 cular margin is the folded sub-opercular row (so), and in- 

 side the V thus formed are the two symmetrical gulars (g), 

 which run back to the junction of the gastric and pectoral 

 rows. The ventral rows (v) form a parenthesis on the stom- 

 ach, stopping behind on either side of the anus. A short 

 sub-branchial row (sb) occurs just outside the base of each 

 ventral fin. 



The organs, viewed from the surface, appear as nearly 

 circular shining spots. Sections show that they are con- 



