GREGARIOUS CRUSTACEA FROM CEYLON, 
17 
secondary appendage to this organ is short and three-jointed ; the 
third joint is the shortest, and is nearly as broad as long; it is 
ciliated upon the flexile margin with hairs, which gradually 
increase in length towards the apex of the appendage.” The 
maxilliped “ consists of five joints, of which the basal is longest 
and broadest, and carries the other four as an appendage.” “ The 
two pairs of gnathopoda and the first pair of pereiopoda resemble 
each other in form and size. They are slender and comparatively 
feeble appendages, and furnished on the anterior margin with long 
plumose hairs.” “ The coxa is fused with the dorsal portion of 
the somite, and forms an overhanging plate-like process.” The 
second and third joints are long and slender, the third and fourth 
each furnished on the front margin with a thick row of plumose 
hairs, standing at right angles with the joint; the fourth joint is 
short, anteriorly produced to a point; the fifth and sixth joints are 
short, slender, with short cilia on each margin ; the finger 44 short, 
curved, unguiculated, and armed with a small subapical tooth or 
secondary unguis.” “ The last four pairs of pereiopoda resemble 
each other in general form ; they are very robust and. strong, and 
are furnished on the anterior and posterior margins with rows of 
stout bushy hairs, which appear to increase in number and 
strength posteriorly, and some of which take a spinous character 
in the last two pairs, as on the distal extremity of the propodos, 
where they become spines with serrated margins.” The uropods 
are marginal, consisting “ of a single branch on a strong and fixed 
peduncle, which is produced to a point directed inwardly ; to the 
under surface of this, near the middle, articulates the solitary 
ramus; this is slightly curved and produced to a pointed apex, 
and is furnished with five or six sharp teeth on the outer margin ; 
the inner margin is smooth, and so is the inferior, both of which 
last are furnished with short fine cilia, in this offering perhaps the 
readiest distinguishable feature from the South American species, 
which has this appendage fringed with long and coarse hairs.” 
The colour of the animal in spirit “ was a subdued sage green.” 
The length is about J inch, and the breadth about half as much. 
The specimens which Miss Harriet Richardson described in 
1897 as Sphceroma destructor were “ found boring the piers on St. 
John’s river atPalatka, Florida.” Their close resemblance in habits 
and appearance to the species described and figured by Bate is 
admitted, but differences are adduced under the four following 
heads : (1) “ the number and arrangement of the tubercles;” (2) 
44 the structure of the f eet;” (3) “ the upcurved margin of the posterior 
half of the terminal segment of the abdomen;” (4) 44 the presence 
of numerous tubercles furnished with bristle-like hairs upon the 
D 8(3)04 
