EEPOET OH THE STOMATOPODA. 
87 
shaft, and a broad ova] exopoclite or scale, but no flagellum, and the three-jointed shaft 
of the first antenna carries two short unjointed terminal pouches. The eye stalks are 
very long, slender, and transverse, and the eyes broad at the rounded conical end. The 
long slender rostrum is about half Q~§) as long as the carapace, and the distance from its 
base to its tip is about equal to the distance from its base to the tip of the labrum. The 
carapace widens posteriorly, and its width between the bases of the antero-lateral spines 
is more than half (-^f) of its width between the bases of the postero-lateral sjDines. Its 
lateral edges are straight, and w T ould if prolonged meet at the tip of the rostrum. The 
carapace and rostrum make up considerably more than half j 5 0 % of the total length, and 
the posterior edge of the carapace, which is nearly transverse, lies on the posterior edge 
of the sixth thoracic somite, while the tips of the divergent postero-lateral spines are in 
the plane of the anterior end of the second abdominal somite. The telson is oval and its 
length is a little (-^|) greater than its width. The lateral marginal spines are about 
midway between the anterior and posterior ends of the telson ; the space between them 
and the intermediate is a little shorter than the space between the intermediate and 
the submedian. There are seven small teeth between the intermediate and the submedian, 
and the distance between the submedians is of the total length. There are only 
three small spines on the outer edge of the carapace at this stage, and they are all behind 
the middle. 
Larva No. 3, 9 T \fo mm. long, is shown in PI. Y. fig. 3. The fifth abdominal somite 
is now distinct, but much shorter than those in front of it, and its appendages are 
perfectly formed but small and without the appendix interna. The thoracic somites and 
appendages are like those of No. 2. The antennae are like those of No 2, except that the 
two flagella of the first antenna are divided each into three joints. The rounded conical 
end of the eye is broader than in the previous stage, and there have been important 
changes in the relative length of the carapace and hind body. The rostrum is less than 
half (Yk) as l° n g as carapace, and the distance from its base to its tip is only -]-§ of 
the distance from its base to the tip of the labrum. The carapace still has the same 
general shape, and its lateral edges are straight, with three spines on the posterior half, 
but its width between the bases of the postero-lateral spines is relatively less, and the 
width between the bases of antero-laterals is to that between the postero-laterals as 15 to 
31, or about 1 to 2. In most other respects this larva is very similar to No. 2. 
Larva No. 4 is shown in PI. IV. fig. 5. It may possibly belong to a different 
species, as it has only one spine on the lateral edge of the carapace, but if distinct it 
must belong to some very closely related species, as there are no essential differences in 
the measurements. The third, fourth, and fifth thoracic somites are shortened and 
crowded together, and their appendages have appeared as bud-like outgrowths, while the 
appendages of the sixth, seventh, and eighth thoracic somites are also represented by 
similar but much smaller buds. The sixth abdominal somite has not yet been separated 
