504 PROCEEDINGS OF THE NATIONAL MUSEUM vol.86 



horizontal haul. Some species were taken only lq the "C" nets or in 

 only the "C" and "B" nets, while others were captured only by "A" 

 nets or "B" and "A" nets. The approximate vertical distribution of 

 each species is discussed in the "Systematic Account." 



It is interesting to note that many of the species are limited in their 

 distribution to the open ocean where the water is 100 fathoms or more 

 deep, even though they may be taken in the upper layers. Off the 

 west coast of the Queen Charlotte Islands, especially in the vicinity of 

 Cape St. James and the outer part of Queen Charlotte Sound, the 

 bottom shelves off rapidly until only a few miles from shore it is over 

 1,500 fathoms deep. It was in this area that many of the most inter- 

 esting fish were taken. This peculiarity of distribution cannot be 

 attributed to the manner in which the hauls were distributed because 

 as many or more stations were made over shallow water as were taken 

 over deep water. Nevertheless, fish that were taken frequently in 

 the shallow nets over deep water were never taken in nets hauled at 

 the same levels over shallow water. They, therefore, must occupy 

 normally a typically pelagic or ba thy pelagic habitat. This is dis- 

 cussed under each species in the text. 



A complete description of each of the stations worked can be found 

 in Report No. 9 of the International Fisheries Commission (Thompson 

 and Van Cleve, 1936, table 16, pp. 134-160). 



DEFINITIONS OF TERMS USED 



In the descriptions of the luminescent organs of the Iniomi the 

 terminology adopted by Parr (1928, pp. 50 and 51, fig. 6) has been 

 used. The term "photophore" designates those circular or ovoid 

 luminescent organs that appear in the regular series on the body, or 

 the similar organs on the head in distinction to the other type of 

 luminous organ, the so-called luminous scales and plates. The 

 regular series of photophores on the body are defined as follows: 



PLO=Suprapectoral organ, macula suprapectoralis, found usually between 



the base of the pectoral fin and the lateral line. 

 PVO = Subpectoral organs, maculae subpectoralis, between the base of the 



pectoral fin and the PO series. 

 P0 = Thoracic organs, maculae pectoralls, along the ventral line between 



the isthmus and the base of the ventral. 

 VLO = Supraventral organ, macula supraven trails, between the base of the 



ventral fin and the lateral line. 

 V0 = Ventral organs, maculae ventralis, between the base of the ventral 



fin and the first rays of the anal fin, on the ventral line. 

 SAO = Supra-anal organs, maculae supraanalis, between the anus and the 



lateral line. 

 AO=Anal organs, maculae analis, along the base of the anal fin, often 



divided by a distinct gap into two series, the antero-AO = antero- 



anal organs, maculae analis anteriores, and postero-AO = postero- 



anal organs, maculae analis posteriores. 



