336 ASELLID®. 
in fully developed individuals, are longer than the whole 
animal. The flagellum is very long, and composed of 
a vast number of articuli, which are twice as broad as 
long, each of which appears to consist of three still more 
minute divisions; the inner antennz have on the second 
joint of the peduncle a small pointed articulate scale, the 
homotype on the large squamiform plate attached to the 
third joint of the peduncle of the inferior antennz in the 
macrourous Decapoda; they are terminated by a slender 
multiarticulate flagellum, reaching beyond the middle of 
the long third joint of the outer pair. The fore legs (first 
pair of gnathopoda) are somewhat more robust than the 
following limbs, and in this pair the terminal ungues are 
unequal in size. The parts of the mouth resemble those 
of Jera, except that in the mandibles we failed to detect 
the palpiform appendage, which may have been broken 
off. The labrum is rounded in front, with a deep 
central incision (fig. *). 
We have restored Dr. Leach’s name of Janira to this 
genus, which Latreille, with complete disregard to the 
rules of priority in nomenclature, had changed to Oniscoda. 
The former name was published in the “ Edinburgh 
Encyclopedia,” vol. vii., previous to 1814, as Dr. Leach 
himself, in his “ Memoir on the Classification of the 
Linnean Insecta,” read at the Linnean Society in the 
early part of 1814, refers to his article in the “ Edinburgh 
Encyclopedia.” In 1826 Risso, finding that the name 
Calypso, which in 1816 he had given to a genus allied to 
Galathea, had already been used by naturalists, proposed 
that of Janira in its stead, in the Errata to his 
** Natural History of the Crustacea of Nice; ” Latreille, 
however, overlooking the prior employment of the name 
Janira by Leach, rejected that name and proposed that 
of Oniscoda in its stead, in the “ Familles Naturelles du 
