48 PKOCEEDINGS OF THE NATIONAL MUSEUM vol.82 



broad and of irregular form ; it has a small spine on the inner border 

 and a stout spine distad of the middle of the outer borders. The ter- 

 minal hook has a rounded projection about midway of the inner mar- 

 gin. In the left foot the second basipod is expanded into two irre- 

 gular processes extending distad. From the distal base of these 

 processes is a lobular process on which is a small spine. The proc- 

 esses doubtless represent the endopod. The second segment of the 

 exopod is rounded at the end; it has a stout dentate spine about 

 midway of the outer border, a small spine on the inner border, and 

 a small spine at the end. 



Length, 0.96 mm. 



Occurrence. — From Manila, Philippine Islands. 



SCHMACKERIA TOLLINGERI (Sewell) 



Plate 23, Figure 2 



Pseudodiaptomus tollingeri Seweix, 1919, pp. 2-5, pi. 10, fig. 8. 



Female. — The head and first thoracic segment are fused. The 

 rostrum is bifid. The last thoracic segment has a single spine situated 

 toward the dorsal surface. The abdomen has four segments, the first 

 three with spines at the distal ends. The genital segment has a 

 transverse row of spines across the ventral side anterior to the genital 

 opening. The third furcal seta is broader than the others. There 

 are two egg sacs. The first antennae have 21 segments and extend to 

 the second abdominal segment. Following is the description of the 

 fifth foot as given by Sewell : 



Each consists of a three-jointed exopod only * * * The second segment 

 is produced at its distal internal angle in a lamelliform process which terminates 

 in a sharp point : externally there is a single small needle-like spine. The 

 third segment bears three spines and is produced externally in a bluntly 

 rounded process ; of the three spines, the outer is long and curved and in length 

 is nearly equal to the whole limb ; it is finely serrated along both borders : the 

 middle spine is straight, about half the length of the outer one and is serrated 

 on both margins ; the inner spine is somewhat curved and is short and stout with 

 coarse serrations on its inner, and fine teeth on its outer, border. 



No figure of the female fifth foot is given, and from the above de- 

 scription it is impossible to make an intelligent description of the foot. 



Length, 1.34 mm. 



Male. — Plate 23, Figure 2, is a reproduction of Sewell's figure of 

 the fifth feet. It is evident that he has omitted the first segments 

 of the basipods. With this omission assumed, the following descrip- 

 tion has been prepared : From the second segment of the basipod of 

 the right foot is a projection terminating in a spine and with a lobular 

 branch on its external side ; this probably is the endopod. The spi- 

 nous prolongation of the external distal angle of the first'segment of 



