EEPOET OX THE BEACHYUEA. 
317 
anterior margin is concave. Orbits very small, subcircular, with two or three fissures. 
The post-abdomen in the male (in the species I have examined) is narrowed at the distal 
extremity, and at base it covers the whole width of the sternum, between the fifth 
ambulatory legs. Eyes small. Antennules obliquely plicated. The basal joint of the 
antennae is well developed, but (in the species I have examined) does not attain the 
front. The exterior maxillipedes (in Randallia granulata) cover the whole of the buccal 
cavity; the triangulate merus-joint is but little produced at the distal extremity, the 
exognath is nearly as broad as the endognath, with the distal extremity rounded, the 
exterior margin straight. The chelipedes (in the males) are well developed; with the merus- 
joint subcylindrical, palm somewdiat compressed, fingers compressed and distally acute ; 
the ambulatory legs are moderately elongated, the joints not dilated, the dactyli styliform. 
The type of this genus, Randallia ornata (Randall), is from Upper California. 
Randallia granulata, n. sp. (PI. XXVI. fig. 1 ). 
The carapace is convex, as broad as or a little broader than long, very coarsely and 
evenly granulated ; the granules larger upon the dorsal than upon the inferior parts of 
the body. The sulci defining the regions of the carapace are discernible in some places ; 
the most distinct being the cardiaco-branchial sulci. There is no tooth or prominence 
upon the hepatic and pterygostomian regions, but the antero-lateral margins, behind 
the hepatic regions, are slightly indented. There are two small granulated lobes or 
prominences upon the posterior margin. The front (in a lateral view) does not project 
beyond the buccal cavity ; it is deeply concave above (in a dorsal view), and therefore 
bilobate, with the lobes rounded. The orbits are very small, with two superior and an 
inferior fissure, and with a very distinct inner subocular hiatus. The epistoma is 
transverse and deeper on the sides than in the middle. The sternum is granulated, the 
segments of the post-abdomen, except the first, second, and last, are partially coalescent,. 
but marked with distinct sulci indicating the sutures of the coalescent segments ; the 
segments in the male are distinctly granulated, except the terminal segment, the sides 
are straight and converge from the base of the third to the terminal segment ; the third 
segment is longest and bears two lateral rounded prominences ; the penultimate segment 
has a small median tooth at its distal extremity, the terminal segment is narrow, nearly 
smooth and rounded distally. The antennulary fossettes are rather large and deep, and (as 
in Stimpson’s description of Randallia ornata) the large basal joints of the antennules 
close the aperture which exists between the epistoma and front, the basal joint of the 
antennae is larger than the following joints, but does not reach the front. The exterior 
maxilhpedes are coarsely granulated ; ischium of the endognath longer than the merus, 
with a smooth inner margin; merus obliquely truncated at the distal extremity; exognath 
robust, with a nearly straight outer margin, the distal extremity rounded and not quite 
