12 
R. NORRIS WOLFENDEN. 
first character probably results from the bad preservation of the animals; the second is 
a character of other members of this genus ; and the third point is characteristic of 
gracilis and robustior. 
Scott merely mentions that “ the large and tumid first abdominal segment seems 
to be a fairly good character” ( loc. cit.). However, this is not a characteristic of this 
species any more than of C. robustior, and the existence of this species up to the present 
time therefore must be regarded as extremely doubtful. However, the £ Discovery ’ 
collections contain several examples of a copepocl, which, if it is not Brady’s species, 
answers fairly well to it so far as his description goes. 
? 3‘5-3'6 mm. long (cephalothorax, 2'75 ; abdomen, '75. Body broadest at the 
end of the first thoracic segment (1' 1 mm. broad). Abdomen short, genital segment 
broad, and one-third broader than the following segment. Furcal segments not quite 
twice as long as broad, and nearly twice as long as the anal segment. Head evenly 
rounded, without trace of crest, separate from the first thoracic segment, last thoracic 
segment only slightly produced, and with rounded margins. Anterior antennae only 
reaching the end of the third abdominal segment, the only long bristles on- the twenty- 
third, twenty-fourth, and twenty-fifth segments, the twenty-fourth joint twice as long as 
the twenty-fifth. Mouth parts resembling C. jinmarchicus. 
Second feet—second basal with four large spines on the distal margin at the inner 
side. Be 3 divided by the external outer spine into proximal and distal portions 
respectively as 23 : 16. Bi 3 with eight bristles. The whole endopodite does not 
reach beyond the distal margin of Be 2. Be 3 as large as Be 1 + Be 2. 
Third feet—four large spines on B 2 distal inner margin, endopodite reaching a 
little beyond the distal margin of Be 2. Be 3 divided into proximal part = 32, distal 
portion =16. Bi 3 with eight bristles. 
Fourth feet—iff 3 divided into proximal part = 37, distal = 15 ; apical saw only 
seven-ninths as long as Be 3. Bi with seven bristles only (three inner, two outer, two 
apical). B 2 with one or two spines on distal inner margin. 
On the second, third, fourth and fifth feet the outer margin of the second basal is 
distally armed with a spine ; in second—fourth, the Be 3 = Be 1 + 2, and is about 
three times as long as broad. 
Fifth feet—first basal with straight inner margin without teeth or hairs, B 2 with 
five spines on the distal inner surface. Bi 3 with six bristles (two inner, two outer, 
two apical). 
The only Calanus with which this shows agreement is, possibly, Brady’s C. tonsus; 
but Brady’s description is so fragmentary that it may well be another species. It 
occurred in some numbers at Station, 22'11'01, Lat. 56° 31' S., Long. 156° 19' 30". 
Such males as were observed were all immature. 
