340 
BRITISH ENTOMOSTRACA. 
the Lerneae from the animals to which they are attached, 
the head is often torn away, and that the ovarian tubes, 
which in this genus are long and slender, may easily like- 
wise be mutilated, and that one of these may be readily 
torn off. If we then examine a species of Lerneonema 
spratta, and compare it with the figure given by Baker, 
and read his description, we shall see at once that the 
animal described by him at p. 35 of vol. xliii, and repre- 
sented at t. i, f. 2, 3, is clearly an individual of that 
species without the head, and with only one ovarian tube, 
which is represented as the body, “ somewhat thicker than 
a hog’s bristle/’ while the real body is represented as the 
head, the necJc being the “ snout.” 
In 1806, Mr. Sowerby again described this parasite of 
the sprat, in his * British Miscellany,’ and gives a figure 
of it, of the natural size in situ , attached to the eye of the 
little fish, and part of a magnified sketch, representing the 
head and neck, detached. These figures of Mr. Sowerby 
have apparently given rise to an amusing mistake on the 
part of M. de Blainville. How he saw T the original figures 
of Sowerby it is difficult to say ; perhaps in the possession 
of Dr. Leach. He has, however, in his paper in the 
f Journal de Physique,’ so often quoted above, reproduced 
the two figures, the one in situ of the natural size, the 
other the magnified sketch of the upper portion only, and 
described them as two distinct species ! The only infor- 
mation, he adds, that he has concerning the two species is, 
“ that they are copied from MS. drawings of the English 
voyage to the Congo !” The figure of the one in situ he 
names the lerncea cyclojohora , the eye of the sprat of 
Sowerby’s figure being described as the round head of the 
Lernea ! while the magnified figure he merely designates 
as a species of “ Lerneide articulee ,” the outline of the 
unfinished short portion or commencement of the body of 
Sowerby’s sketch being taken by him as the oviferous 
tubes ! 
One or two other species have since been described, 
but the number known is yet but few. 
