GLYPHOCRANGON SPINULOSA. 139 
the marginal spines there is an irregular longitudinal row of very small spin- 
ules on each side of the rostrum. 
The carapace is thickly strewn with spinules which are laterally com- 
pressed. Along six longitudinal lines on each side of the carapace the spines 
are larger, more flattened laterally, forming interrupted carine. The third 
carina (reckoning from the dorsal line) ends anteriorly at the deep branchio- 
hepatic sulcus. The fourth carina, on the contrary, is especially prominent 
on the hepatic region, where it is broken up into two or three prominent 
teeth. The two lowermost carina are obsolescent. The anterior margin 
of the carapace is produced into a large external orbital spine directed 
obliquely upward and outward. The hind margin of this spine or tooth is 
armed with a variable number of spinules. The antero-external angle of 
the carapace is produced into a strong spine directed downward and a little 
outward. 
The abdomen, like the carapace, is spinulose on the dorsum and pleure. 
An interrupted carina extends the length of the median dorsal line. On the 
sixth segment this carina is toothed along its edge. On the first segment, 
on each side of the median carina, in line with the second carina of the cara- 
pace, there is a prominent acute tooth directed obliquely forward. The 
pleure of the first segment are for the chief part converted into smooth 
facets which lie beneath the next pleurze when the abdomen is flexed ; their 
free margins are unarmed. The second to the fourth pleure are armed infe- 
riorly with two spines curved outward and backward, the anterior of the two 
being the larger. The fifth pleurs are likewise armed with two spines, but in 
this case the posterior spine is the larger. The sixth pleurs end posteriorly 
in a single spine directed outward at a greater angle than those on the ante- 
cedent segments. The median dorsal carina of the abdomen is continued 
along the basal part of the telson in the shape of a line of four or five teeth, 
decreasing in size from before backward. On either side of the median dorsal 
line there is a lateral carina which is spinous anteriorly, but entire toward the 
tip. The lateral margins of the telson are similarly carinated and spinulose. 
The eyes are very large and colored with a dark pigment. The antennal 
scale is much shorter than the rostrum, ovate, its margins ciliated ; the me- 
dian longitudinal rib is spinulose as well as the portion of the field lying 
external to the rib. The lower side of the scale is also spinulose, although 
in a less degree than the upper side. 
The dactyli of the fourth and fifth pairs of legs are lanceolate, compressed 
vertically, concave above and convex below. 
