23 



is of the opinidu that each of the geuital apertures is provided with a separate frame, of 

 which he presents a dr-awing (fig. 5e), but the anterior part of these frames is scarceh' 

 correct in drawing, as it is not likely to reach up to the »pore de f6condation« (orifice of 

 the receptaculum seminis) which — we see — here for the first time is proved to exist 

 in an animal of this family. Neither has he seen the median part of the firm cliitine of 

 the genital area wliich unites the two »fi-ames«, but it must be pointed out, that without 

 a special dissection — in which, moreover, a certain amount of practice is desirable — 

 these details are difficult to discover. The whole description of the two small specimens 

 is considerably better than the above-mentioned joint work on this family by the same 

 author and Prof. A. Giard. 



