8 Addis on E. V err ill, 



horns are large and strong, compressed, acute, curved forward, and 

 slightly downward at the tips ; usually the tips are also somewhat 

 convergent. 



The spines of the carapace are not very numerous, but the larger 

 ones are very sharp and are directed strongly forward. The 

 largest are two behind the bases of the frontal horns, and on each 

 side, two near the margin, at bases oj: the antennae. Back of the 

 large dorsal pair are four, irregular, dorsal rows, with about five 

 or six in each row, of which the two larger in each row are in 

 front of the cervical suture. On the sides there are two imperfect 

 and interrupted rows and some scattered spines, mostly more 

 strongly appressed and smaller than the dorsal ones. A transverse 

 row of about twelve low conical spines borders the posterior, 

 submarginal groove. In some large specimens these become low 

 denticles. The sides and posterior parts of the carapace are also 

 covered with small, unequal, conical spinules, which are not 

 crowded; on the anterior parts, including the gastric, hepatic, and 

 cardiac areas, they become much fewer and smaller with large, 

 smooth spaces between them. 



The eye-stalks and eyes are large and the eyes are prominent. 

 The somite that carries the eyes is very distinct. A strong, 

 rounded rib, arising from the posterior and outer bases of the 

 rostal horns, curves forward to the inner base of the antennas, and 

 continues as a border to the antennular somite. 



The antennular somite is longer than broad, bordered laterally by 

 the strong marginal ribs, just referred to. It curves downward 

 distally, and bears, on its upper surface, four rather small, acute, 

 conical spines, directed somewhat forward. They are not so large 

 as the larger dorsal spines. They form a trapezoid figure, the 

 distance between them longitudinally being considerably greater 

 than the transverse spaces. The anterior pair are close to the front 

 edge, and a little divergent; the second pair are a little smaller 

 and somewhat nearer together. In some specimens, especially the 

 younger ones, there are two or three smaller spines irregularly 

 placed between or near the larger ones. In a medium sized speci- 

 men before me (No. 4102), the distance between the tips of the 

 anterior spines is lomm; between the posterior ones, 7.5mm; 

 between the anterior and posterior ones, I2mm. 



The distal joint of the antennal peduncle has three large porrect 



