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An adult parasite, especially when it has laid several ovisacs, is easily seen through the carapace, 
but if we want to find out if a specimen without swelling is infested with larvee, pups or 
recently hatched specimens, we must examine it carefully under a good dissecting microscope. 
I will try to give special statistics of my material, but unfortunately, at the beginning 
of my investigation some years ago, I omitted to put down sufficient notes about a few of 
my specimens, so [ cannot give as perfect statements as I should like. Of 433 specimens 
of Diast. lucifera, 66 were infested, 367 were not. Of the latter, 182 were females with 
eges or young ones in the marsupium, 74 females with empty marsupium, 28 adult 
males, 7 young males (before the last moulting) and 76 young females (some of them 
may have been males without rudiments of abdominal appendages). Of the 66 infested 
specimens 13 were females with young ones in the marsupium, (there was not one 
with eges), 31 females with well-developed though empty marsupium, no adult males, 3 
young males and 15 young females; concerning 4 specimens sufficient notes are wanting, 
at all events none of them was an adult male. Of the 62 specimens, 33 contained 
an adult female with one or more ovisacs, and also, of course, a male, and of these 33 
hosts, 4 were females with young ones in the marsupium, 13 were females with empty 
marsupium, 13 young females and 3 young males. In 29 of the 62 specimens was found 
either a moderately large female without eggs, or one (or two) males, or in many cases 
recently hatched specimens or pupee, and in at least one case, only one recently entered 
larva. Of these 29 hosts, 9 were females with young ones in the marsupium, 18 were 
females with well-developed, empty marsupium, and 2 young females (without marsupium). 
No help is needed to draw various conclusions from these figures; I will only observe that 
the number of males collected is too small to allow us to conclude that they are never 
infested (s. the following species). 
REMARKS. The three infested specimens first observed were discovered by the 
Inspector, Dr. F. Meinert, whom I had asked to look out for eventual parasites in determining 
the Cumacea from the cruises of the »Hauch«. With respect to the figures it may be 
observed that in fig. la I haven given a drawing (in the same enlargement as fig. 1 b and 1¢ 
etc.) of a rather young female, whose limbs are remarkably long, as in the male (fig. 1d), 
and which has already four spermatophores attached to its genital area, though it is far 
from being old enough to begin laying eggs. Fig. 3a (pl. 1) exhibits two spermatophores (s) 
fixed at the entrances to the receptacula seminis (r), which are seen through the skin and 
are indicated by dotted lines. 
2. Homoeoscelis mediterranea n. sp. 
(PI. XIII, fig. 1a—th). 
FEMALE. The specimen represented (fig. 1a) is 28 mm. in length, °23 mm. in 
breadth; the largest specimen taken out measures ‘31 mm. in length, °32 mm. in breadth. 
