672 GREENE. [Vol. XV. 



the inner, but this appearance is in part due to the fact that 

 the inner organs are more deeply buried in the angle of the 

 base of the fin. The posterior two or three pairs are closely 

 united. The anal row contains a single line of sense organs. 

 There are thirty-four of these organs in the line. The first 

 is placed just in front of the second pair of phosphorescent 

 organs, and each successive one bears the same relation to its 

 corresponding phosphorescent organ, except the last two, which 

 are placed external to and just above the four or five phos- 

 phorescent organs along the base of the caudal. 



The " ventral rows, v, form a parenthesis on the stomach," 

 extending from the side of the anus three-fourths the distance 

 to the ventral fin. The anterior ends of the two rows are 

 usually continuous with each other, and comprise thirty-four 

 phosphorescent organs on either side. The organs present a 

 clear, circular outline without apparent increase of pigment 

 around them. These rows are not accompanied by sense 

 organs. 



The " gastric " line of phosphorescent organs, ga, begins a 

 little below the middle of the front of the base of the pectoral, 

 curves forward, downward, then backward, around the lower 

 edge of the pectoral ; then extends straight back along the 

 side of the belly to a point dorsal to the anterior edge of the anal 

 papilla. The line contains an average of thirty organs, about 

 ten in the curved portion and twenty in the straight part of the 

 line. 



The "gular" line, gu, begins a little back of the isthmus 

 and runs parallel with its fellow backward to the posterior and 

 ventral side of the ventral fin, then curves outward and back- 

 ward to a point below the anterior end of the straight portion 

 of the gastric line. There is an average of twenty-seven organs 

 in this row. The gular line gives off a short spur of seven 

 organs running forward along the external border of the 

 ventral fin. 



The gastro-gular line, ga gu, of sense organs begins at the 

 isthmus somewhat anterior to the end and toward the median 

 ventral side of the phosphorescent row, runs posteriorly parallel 

 to the phosphorescent line to its end, then backward parallel to 



