AET. 18 SYNOPSIS OF CALANOED CRUSTACEA — MARSH 41 



reaches to about the end of the first segment of the exopod. The 

 first segment of the exopod has patches of small spines on its poste- 

 rior surface and the outer distal angle is extended in a spine which 

 exceeds two-thirds the length of the second segment; the lateral 

 spine of the second segment is near the distal end. The terminal 

 hook is falciform and about as long as the two segments of the 

 exopod. The left foot has a flask-shaped endopod, the base broad 

 and the distal end pointed. The second segment of the exopod is 

 broadened, pointed at the distal end, and has a spine on its outer 

 border. 



Length, 1.3 mm. 



Occurrence. — Found in Quilimane Eiver, East Africa. 



Remarks. — P. stuhlTnanni., P. salinus, and P. hessei are very closely 

 related, but are clearly distinguished by details of the fifth feet of 

 the male. 



Genus SCHMACKERIA Poppe and Richard, 1890 



From PseudodiaptoTnus as generally recognized may be separated 

 those species in which the second segment of the basipod of the left 

 fifth foot of the male is armed, on its inner border, with a long 

 curved projection resembling, in some cases, the similar structure 

 in Epischura. In all these species the last thoracic segment of the 

 female is rounded. In other respects they do not differ from the 

 recognized diagnosis of Pseudodiaptomus. For these species the 

 generic name ScJimacheria is revived, as S. forhesi was one of these 

 species and was made by Poppe and Richard the type of the genus 

 Schraackeria. 



Occurrence. — Schniackeria occurs in India, China, Celebes, the 

 Philippines, and Africa ; only one species, S. serricaudatus, is found 

 in Africa. 



Our knowledge of this genus as well as of Pseudodiaptomus is 

 very incomplete, and a discussion of the causes of distribution and 

 the genesis of the forms is impossible at the present time. 



KEY TO THE SPECIES OF SCHMACKEEIA 



1. Two processes on second segment of basipod of left fiftli foot 



of male 2 



One process on second segment of basipod of left fifth foot 

 of male 4 



2. Both processes springing from second basipod 3 



One process springing from basipod, the other a branch of the 



first smithi Wright 



3. Process on second segment of basipod of right fifth foot of male 



with a spine and a lobular branch, corresponding to an endo- 

 pod; female having a single spine on dorsal surface of last 

 thoracic segment , tollingeri (Sewell) 



