150 STALK-EYED CRUSTACEA. 
of small spines on the dorsal ribs of the telson, and sometimes the rudiment 
of a third pair near the tip. 
The thoracic sterna are armed ine two median spines, one of which is 
situate on the somite which normally bears the second pair of legs, the 
other on the following somite. 
The sternum of the first to the fifth somites of the abdomen bears a long 
spinous median tooth, while the sixth somite is armed with a pair of smaller 
spines on the anterior margin of the sternum. 
The eyes are of moderate size, black, and situated on short, rather stout 
peduncles. 
The first segment of the antennular peduncle is long, enlarged proxi- 
mally, and furnished with a rounded external plate at the proximal end; it 
is thickly clothed with hairs on its inner margin. The second segment is 
shorter, more nearly cylindrical, and is likewise furnished with hairs along 
its inner and inferior margin. The third segment is much shorter than the 
second, and bears two flagella, the outer of which is about twice as long 
as the inner, much broader, and composed of about twenty-two flattened 
segments. 
The peduncle of the antenna considerably overreaches the antennal 
scale, and is of nearly the same length as the antennular peduncle. The 
antennal flagellum is about equal in length to the whole body. 
The third maxillipeds are long and pediform, surpassing the antennal 
peduncle when directed straight forward. The terminal segment is some- 
what flattened, but not enlarged. 
The chelipeds are of moderate length, reaching forward slightly beyond 
the peduncle of the antennez; there is a spine on each side of the distal 
end of the carpus, and another long and acute one at the antero-internal 
angle of the propodite. Of the second pair of legs there is no trace. The 
third pair is very slender and longer than the first pair. The fourth and fifth 
pairs are more robust than the third pair and also longer, the fifth pair sur- 
passing the fourth. They terminate in a curved and very sharp dactylus. 
The abdominal appendages are biramose, the inner branch being well 
developed and subequal to the outer branch, except in the first pair, where 
it is very small in both sexes. In the male the inner branch of the second 
pair carries a stylamblys on its internal margin. The terminal pair is much 
shorter than the telson. 
Length of a female from tip of rostrum to end of telson, 85 mm.; length 
