158 
Antennal scales short, feeble, subtriangular, without dis- 
tal spines, flagella short. 
Third maxillipeds long, the distal joints vertically com- 
pressed. 
First pereiopods robust. 
Second  pereiopods non-chelate, shortened but rather 
robust, reaching as far as the carpal joints of the first, car- 
pus and propodus together about as long as the merus. 
Third pereiopods styliform. 
The pleopods have much expanded peduncles, which be- 
come faced outwards in the female, the rami are curved, es- 
pecially the inner. 
The uropods and telson are short, the telson broad, round- 
ed at the end, and ciliate, but not spined. 
There is a ridge on the ventral surface between the first 
and second pairs of pereiopods, terminating anteriorly in a 
projecting spine between the first pair. 
Vercoia gibbosa, n. sp. РІ. xxxi., figs. 1-4. 
Body short, very much depressed at the first segment of 
the pleon, gibbous and much sculptured with many obtuse 
prominences, but no spines. Carapace of rigid consistence, 
deep, dorsal surface broad, rather depressed, consisting of a 
shield-like platform, which occupies nearly the whole length; 
this is rather excavate in the gastric region, and anteriorly 
and medianly bears the short, slightly excavate, and entire 
rostrum.  Laterally from the rostrum on each side is a lobe, 
slightly insinuated on the margin projecting in front of the 
eye, and forming the upper anterior part of the orbit. The 
lateral margin of the platform on each side is marked first 
by a small tooth immediately over the eye, then by a short, 
slightly sigmoid, detached ridge, and behind this a short, 
straight ridge beginning abruptly. The posterior boundary 
on each side of the median line consists of a small, incurved, 
oblique ridge, and behind these a pair of longer, converging 
ridges, forming together a broad V, the apex of which 
reaches close to the posterior margin of the carapace. The 
surface of the anterior or gastric portion of this platform is 
smooth, but the cardiac portion has medianly a longitudinal 
ridge, divided into three portions—or obtuse carinæ, the 
most anterior part of which is short and low—not visible 
from a side view, the second and third portions are strongly 
elevated, the third being declivous behind towards the pos- 
terior margin of the carapace; on each side of the middle 
portion is a short, transverse, scale-like ridge. The antero- 
lateral angles of the carapace are produced considerably in ad- 
vance of the eyes to near the bases of the antennal scales, from 
them on each side an oblique ridge extends backward and 
