10 G. O. Sårs. 



spiniform character (see fig. 8 a). The exopodite is of ob- 

 long oval form and, as usual, much smaller on the 1st pair 

 (fig. 7) than on the others. The epipodite is of moderate size 

 and of the same appearance in all the legs except the last 

 pair (fig. 9), in which it is of larger size and quite lamellar 

 in structure, with the terminal edge minutely denticulate. 

 The basal plate in all the legs is distinctly serrate at the 

 edges. 



Occurrenc e. — The solitary specimen examined by 

 Baird is said to have been found alive in a pail of milk 

 (the exact locality not being indicated). In Prof. Hender- 

 son^s collection, there are several well-preserved specimens, 

 males and females, of this beautiful species. According 

 to the label, they were collected on the Stevaroy Hills, 

 at a height of 5000 feet. 



Division ConcJiostraca. 



F am. Estheriidœ. 

 Remarks. — This family is here taken in a much more 

 restricted sense than was done by earlier authors, who com- 

 prised within it almost all bivalve Phyllopoda. In the restriction 

 here adopted, it only contains as yet 2 genera, viz., Estheria 

 Rüppel and Leptestheria G. O. Sars, which, though evidently 

 nearly allied, differ in a number of well-marked characters. 

 Only one of these genera is represented in the collection of 

 Prof. Henderson. 



Gen. Leptestheria, G. O. Sars. 

 Remarks. — This genus was, established by the present 

 author in the year 1898, to include a South African species, 

 for which the name L. siliqua was proposed, and on that 



