150 



Appendices to Fourth Annual Beport 



only twelve joints, the last three being very long and slender. There 

 is a hinge, the joints below which are considerably smaller, and a denti- 

 culated plate is present both above and below the hinge ; there are hardly 

 any setse except on the terminal joint. The fifth pair of feet in the 

 male are three-jointed, the right foot having two branches, the left only 

 one. In the female the fifth pair of feet are two-branched, the branches 

 being straight and single-jointed. The abdomen of the female is pecu- 

 liar ; there are three segments ; the first is the longest, and is broad and 

 strong ; the second, when seen from the side, has a process projecting 

 backwards over the dorsal surface of the third segment. When seen from 

 above, in addition to this process, a small one is visible on either side ; 

 the third segment splits slightly into two, so as to receive the caudal seg- 

 ments, which are short, and bear setae scarcely as long as the abdomen. 

 The male abdomen has four segments, the last two bearing each a short 

 sharp spine. This is a small and not over abundant copepod, of a brown 

 colour. 



Anomalocera Patersonii (Templeton). — The male is easily recognised 

 by its club-shaped antennae ; its colour varies from a yellow or bright-red 

 to a blue or light-grey, but all these colours may be present in the same 

 animal. The body is elongated and large, and the anterior antennae are 

 twenty-four-jointed. 



In the male the right antenna has a larger swelling than the left, the 

 thirteenth, fourteenth, fifteenth, and sixteenth joints are included in it; 

 the fourteenth joint carries a strong straight spine, hooked at the apex, 

 and jointed at the base in a similar manner to the sting of a nettle ; this 

 spine has probably some function in connection with the swelling to which it 

 is attached, it may be auditary as suggested by Brady, or it may serve as 

 a weapon of offence. The fifth foot is one-branched, and four-jointed, the 

 last two joints forming a strong grasping hand. The last thoracic segment 

 is produced only in the right side into a projecting spine. In the female 

 the antennae are slender and have no swellings. The fifth pair of feet are 

 two-branched, the inner of which is small and stunted, but the outer are 

 long and two jointed. The abdomen consists of three segments, the first of 

 which bears a spine produced backwards on the ventral surface, about 

 half the length of the second segment. The rostrum is large and bifid, 

 with, at its base, a pair of lateral eyes on each side, but there is also a 

 median eye, which is stalked and situated immediately above the bases of 

 the antennae. This copepod was fairly abundant. 



Cyclopid^. 



Oithona spinifrons (Boeck). — The anterior antennae are ten-jointed, and 

 form a very distinctive feature of this species on account of their extremely 

 long setae. All the ordinary swimming feet appear to be very much alike ; 

 both branches are three-jointed, and strongly setose on their inner margins. 

 The fifth pair of feet, however, in the female are peculiar, each is com- 

 posed of an exceedingly small basal joint, with two long setae attached 

 to it. The abdomen is very long and composed of five segments; the tail 

 segments are short, with five apical setae, and a small seta at the base of 

 the tail segments. It is an exceedingly small translucent copepod, and 

 exclusively a surface form. Only a very few specimens were obtained 

 late in the season. 



Harpaclicid^. 



Amymone Sphserica (Glaus). — This copepod was not more numerous 

 than the last. The first segment of the body is produced ventrally and 



