150 
BULLETIN OP THE BUBEAU OP FISHERIES 
be seen darting about in the water around the Fisheries dock throughout the spring 
months. G. annulatus reached its maximum after Calliopius had started to decline, 
although the collections of April often contained many specimens of both species. 
Verrill records great swarms of Calliopius far out at sea during this season. On 
one occasion they were found to be very abundant in the Gulf Stream. 
After heavy northeast or southeast storms great numbers of amphipods are 
often found in the tow. At such times, however, many species usually appear. 
This condition characterizes the grout' and contrasts it with the first group, where 
Corophlian cyllndrlctan 
Caprella geometrlca 
Ainphlthoe longlniaiia 
Ampblthoe mbrloata 
ftunmrns Icrasta 
Pontogenla Inermls. 
Thiol Ola Irrorata 
Cnmoronatus 
Stenethoe cyprls 
Batea seomida 
Elasmopos laeTls 
Ptlloohelrus plnqnls 
Caprella linearis 
Paraphoius splnostis 
Anpellsoa ocmpressa 
Ampellsca splnlpes 
Sybils serrata 
Synohelldlum sp« 
Jassa mamorata 
Anrpellsoa maorooejihala 
Konooulodes edwardsl 
Calliopius laevliisoulus: 
Ganmaras amulatus 
Gmbia compta 
Tryjjhosa plnquls 
Bnthemlsto blsplnosa 
Eathemlsto mtrlcomls 
Fig. 52.— Occurrence of amphipods in surface collections from June, 1922, to May, 1923 
one or two species make up tne entire amphipod representation. These conditions 
are particularly obvious in summer. On July 24, 1922, after a hard northeast 
storm, seven species of amphipods and two species of isopods were taken in one 
day's collection. Such heavy offshore winds carry the surface waters out and 
cause an upwelling of bottom waters, carrying many of the bottom animals with 
them. 
The third group appeared only in summer. It was made up of the same species 
as the second group, but these occurrences were the result of different causes. 
'Throughout the summer and particularly after the great diatom maximum the 
water was extremely phosphorescent. At such times the net appeared like a ball 
