ART. 18 SYNOPSIS OF CALANOID CRUSTACEA — MAESH 43 



drawn, makes it fairly certain that in this species, as in others of the 

 genus, each foot consists of a 2-segmented basipod and a 2-segmented 

 exopod. In the right foot the second segment of the basipod, not as 

 stated by Sewell the frst segment of the exopod, has a row of spines 

 on its outer margin and from its inner margin a bifid process which 

 is probabl}^ an endopod. The long spinelike process with the short 

 recurved hook must be the long spine which is usually present on the 

 outer distal angle of the first segment of the exopod. The separation 

 between the first and second segments of the exopod is not shown in 

 the figure. The terminal hook is broad. Using a similar interpreta- 

 tion in regard to the segments of the left foot, we may describe it 

 as follows : The second segment of the basipod is expanded internally 

 into a broad process, doubtless representing the endopod. The first 

 segment of the exopod has a blunt process and a spine on its inner 

 border. The second segment of the exopod has a stout dentate spine 

 on its outer margin at about one-third the length of the segment ; it 

 terminates in a blunt point, which has, on the inner side, a blunt 

 spine. 



Length, 1.09 mm. 



Occurrence. — Found in Chilka Lake, India. 



SCHMACKERIA BINGHAMI (Sewell) 



Plate 21, Figures 2, 3 



Pseitdodiaptomus hinghami Sewell, 1912, pp. 337, 338, pi. 17, figs. 8-11; 1919, 

 pp. 7-9 ; 1924, p. 786, pi. 45, fig. 2. 



Female. — The head is fused with the first thoracic segment. The 

 rostrum is bifid. The last thoracic segment is rounded and has a 

 small spine near the dorsal surface. The abdomen has four seg- 

 ments, the first three having spines at the distal ends. The furcal 

 rami are rather short and symmetrical, and are ciliate on the inner 

 border. The third terminal seta is much broader than the others. 

 The terminal segment of the fifth foot (pi. 21, fig. 3) has besides the 

 terminal hook a small external spine, a stouter internal spine, and 

 from the base of the hook a slender spine equaling in length the 

 one at the inner angle. 



Length, 1.3 mm. 



Male. — In the right fifth foot (pi. 21, fig. 2) there is a prominent 

 rounded process on the interior of the terminal hook about midway 

 of its length. The process of the second segment of the basipod of 

 the left foot is long, curved, and pointed. The second segment of 

 the left exopod is a broad, oval plate having a spine about midway 

 of its outer border and a row of small spines on the inner border 

 near the proximal end. 



Length, 0.86 mm. 



