+9t- — 
BARBADOS-ANTIGUA REPORTS 91 
Upogebia (Gebiopsis) operculata, new species 
Okra Reef, May 13; 1 ¢ holotype. Okra Reef, 16, May 138; 
2. 
A new species which in the structure of its tail fan and the 
last two abdominal somites undoubtedly represents the Atlantic 
analog of ‘‘Gebia’’ [Upogebia (Gebiopsis)] rugosa Lockington."® 
Rostrum in front of the line connecting the anterior spines of the lat- 
eral ridges of the gastric region, short, thick, rounded triangular, de- 
pressed, armed on each lateral border with two strong spines, the anterior 
pair situated at about or a little before the middle of the length of this 
frontal portion, the posterior pair situated within and anterior to the 
spines terminating the lateral gastric ridges, separated from them by the 
furrow lying just within either ridge, which at this point turns out to 
meet the frontal margin, behind these grooves, or furrows reach the 
cervical groove; between the two posterior spines of the front are two 
smaller spines, making a row of four across its base. In the holotype 
the lateral gastric ridges are armed with nine blunt, spiniform tubercles 
arranged in an anterior group of four larger spines and a _ posterior 
group of five smaller more separated tubercles; in the only other known 
specimen of this species there are from eleven to twelve tubercles on the 
lateral ridges. On the dorsum of the anterior portion of the carapace 
are four rather irregular rows of at times twined, paired, blunt spines, 
anteriorly these rows, the two either side of the mid-dorsal line, con- 
verge and apex, in the corresponding spine of the median pair of the 
basal line of the front, the mid-dorsal line of the anterior portion of 
carapace is somewhat grooved in its anterior half, posteriorly the rows 
become more irregular and harder to trace, the tubercles constituting 
them becoming smaller, less distinct and finally, virtually disappearing in 
the posterior third or fourth of the anterior portion of the carapace just 
before the cervical groove, where there are but one or two little granules 
to be found, the rostral, frontal, region of the carapace is thickly hirsute, 
while proximally before the cervical groove the anterior portion of the 
carapace is virtually without hairs. The antero-lateral portions of bran- 
chial regions are armed with a group of three or four or more small, 
spiniform granules. 
The antennal peduncles exceed the rostrum by the length of the ter- 
minal joint and about the distal third or a little more of the penultimate 
joint taken together; antennular peduncle surpasses the proximal margin 
of the terminal joint of the antennal peduncle, and is slender and rather 
feeble as compared to the latter, in the paratype reaching one-third the 
length of the end joint of the antennal peduncle; flagella of antennules 
about equal in length, about as long as their peduncle, upper or outer 
flagellum the stouter composed of nineteen segments, thinner of fourteen. 
There is but one cheliped to the two specimens, this was found in the 
18 Ann. Mag. Nat. Hist., (5), II (1878), p. 300. 
