REPORT ON" THE STOMATOPODA. 87 



sliaft, and a broad oval exopodite 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 ('f ) 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 spines. Its 

 lateral edges are straight, and would if prolonged meet at the tip of the rostrum. The 

 carapace and rostrum make up considerably more than half ^ of the total length, and 

 the posterior edge of the carapace, which is nearly transverse, lies on the posterior edo-e 

 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 submediau. 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^ mm. long, is shown in PI. V. 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 (^) as long as the carapace, and the distance from its base to its tip is only f | 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 showoi in PI. IV. fig. 5. It may possibly belong to a difi'erent 

 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 



