TOrOGKAPHY OF THE S AG AMI SEA. 13 



the Yahagi-Une by Mera lYo — 2. A short distance ENE of 

 this ground is a phice called Haidashi, about 120 fathoms deep, 

 where the fishing for Sepia and also for Seriola quinquei^adiata 

 is extensively done at certain seasons of the year, 



Mochiyama is a long-lining ground on the northern side of 

 the deep trough leading towards the Uraga Channel. It lies 

 nearly on the Surushiki-line and derives its narue from being on 

 the line of the same name in the Mera-Sunosaki series. 



Numa, or the ' Marsh,' so named on account of the soft 

 muddy bottom, is reached by steering on the Matsw a- Lighthouse- 

 line and by bringing CajJe Daibusa to bear nearly due east. 

 Cape Mera still lies out of sight behind Sunosaki. On the chart, 

 the locality falls nearly on the spot where the deep trough on 

 the north of Okinose divides into two gullies, the one directed 

 tOAvards Tateyama Bay and the other leading into the Uraga 

 Channel. 



A short distance farther south than iS[uma is situated Do- 

 ketsba, or the ' Euplectella-ground,' a name given by myself in 

 1894 and which has since been in use among the collectors. I 

 think this ground constitutes a portion of the northern slope of 

 Okinosé at a distance of 4-10 kilometers to the northwest of C. 

 Sunosaki. So far as I can state at present, it comprises the area 

 between the Ena and the Amezahi lines on the one hand and 

 between the lines ' Mera 1 ' . and ' Mera 3 ' on the other. The 

 depth varies from 75 to 160 fathoms and over. The bottom, 

 exceedingly rich in varied forms of life, is shelly. 



In the broad sea south of Okinosé are situated two more 

 important fishing grounds, Homba and Gokeba. From the latter 

 I have called that entire region the Gokeba Basin. 



Homba is situated a little over 10 kilometers SW. of C. 



