FAMILY SPHHROMIDA. ie 
an earlier occasion Cirolanide, Aigide, etc., as sub-families 
of the Cymothoidee (sens. lat.),and to-day I cancel the family 
Limnoriide, referring it as a sub-family to the family Sphero- 
mide. 
II. On THE PROPAGATION. 
Even among avery large material of Sphzroma (Bosc) and: 
Cymodoce (Leach) it is next to impossible to find a single 
specimen with eges or young in the marsupium, though it is 
generally easy to find numerous specimens with the marsupium 
well developed. It is, in my opinion, a testimony of the want 
of study of the family that this curious feature has been over- 
looked by all authors excepting Leichmann, who observed 
and explained it in one species of Sphzroma, but did not 
examine any other form of the family. I shall now give a 
very brief abstract of some selected points of Leichmann’s 
paper, adding a few remarks, and then proceed to my own 
observations on numerous other genera of the family; it may, 
however, be added that some interesting questions I am 
certainly able to point out, but, for want of sufficient material, 
not to solve in any satisfactory way. 
Leichmann published a preliminary note in ‘ Zoologischer 
Anzeiger’ for 1890—the chief paper, “ Beitraige fiir Natur- 
geschichte der Isopoden,” in ‘Bibliotheca Zoologica,’ 1891. 
He studied specimens of Spheroma rugicauda (Leach) 
gathered near Dantzig. He describes and figures the mar- 
supial lamellz as so small that the lamelle from the two 
opposite sides do not touch each other with their margins. 
This statement is quite incomprehensible. I have examined 
specimens of the same species from the coasts of Denmark, 
even from Vordingborg at the Baltic, and in animals carrying 
brood the lamelle from the two halves always overlap each 
other considerably. An erroneous determination is excluded, 
as S.rugicauda is the only species of the Spheromine 
known from the Baltic and even from Denmark ; furthermore, 
in S. serratum (Fabr.) and in the other species of the genus 
in its restricted sense (see below) I have always found the 
