112 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
possessed very few species, and often even very few specimens, and the ani- 
mals being not very easy to examine, and still less to describe and draw, the 
result is that most of the species are imperfectly represented, and many of the 
genera badly or not at all limited. Giard and Bonnier have given full descrip- 
tions of a few species only, as their principal work on this sub-family has not 
yet been published. They have made an attempt to divide the Bopyrine into 
three groups, Phyxiens, Bopyriens, and Ioniens ; but I am unable to perceive 
the limits between the two first named groups, and even the group Ioniens is 
not very sharply defined. We must wait until a number of still unknown forms 
have been thoroughly studied and many of the already established species re- 
examined before it will be possible to divide the sub-family into natural 
groups. I must add, however, that the few descriptions just mentioned of 
the two authors have been very useful to me. In 1893, T. R. R. Stebbing, 
in his well known work, “A History of Crustacea — Recent Malacostraca,” 
gave a very good catalogue of all the twenty-one genera and almost all the 
species hitherto established. 
1 must confess that I have been unable to refer more than one of my five new 
species to any of the genera hitherto established, and as they are very different 
from one another it is necessary to institute four new genera, — a result with 
which I am rather dissatisfied, not being sure that they all will prove to be 
valid. On account of the present state of things, I do not venture to lay down 
diagnoses of the new genera ; but I hope that by means of my rather numerous 
figures and tolerably full descriptions it will be easy not only to recognize my 
species, but also to place the genera properly and work out the diagnoses, when 
in the future we get a real systematic arrangement. 
10. Cryptione elongata, n. gen., n. sp. 
Plate II. Fig. 5-5 a; Plate IV. Fig. 1-1 y. 
A. fine female with its male (Fig. 1 a, m) was discovered. 
a. Female. 
The body is elongate (Fig. 1) and (the uropods not included) about twice as 
long as broad; the greatest breadth at about the middle. 
Head. It forms, when seen from above (Fig. 1), almost a regular transverse 
oval, with the anterior half projecting in advance of the antero-lateral part of 
the thorax and the frontal margin considerably and evenly curved ; the dorsal 
surface somewhat convex, with a depression a little inside of the anterior mar- 
gin. Theantennule (Fig. 10, a) rather distant from each other, of medium size, 
3-jointed ; the basal joint is considerably enlarged, the terminal joint minute, 
The antenne (b) rather long, 3-jointed ; the basal joint very large, ovate, with 
the second joint proceeding from the extero-anterior part ; the second joint rela- 
tively rather long and robust (compare the following forms), the third some- 
what shorter and considerably more slender. A frontal plate is absent, and 
between the antennule, the antennæ, and the labrum is found a rather large 
