REPORT OX THE STOMATOPODA. 
89 
mated to each other at each successive moult, are now separated by a space equal to only 
rMo or l ess than °f the total length, while in stage 1 the distance between them is 
ttotjo °f the total length. As shown in PI. VIII. fig. 6, there are fourteen short acute 
spines between the submedians, with still smaller spines between them, and there are 
fifteen small acute dentations between each submedian and the intermediate of the same 
side, which is about equal in length to the submedian. 
The uropod of a specimen of the same size, which was captured at the surface by the 
Challenger expedition, between Api and Cape York, is shown in ventral view in PI. VIII. 
fig. 4. The exopodite is now divided into a paddle and a second joint, and the latter 
has five spines on its outer margin. The ventral prolongation from the basal joint ends in 
a short outer spine and a much longer inner one, which has a rounded lobe on its outer, 
margin, near the base. 
From the table of measurements given above the following measurements may 
be selected as showing the character of the changes through which the larva passes 
during its growth. They are all in thousandths of the total length from the tip of the 
rostrum. 
Xo. 1. 
Xo. 2. 
Xo. 3. 
Xo. 4. 
Xo. 5. 
Xo. 6. 
Rostrum, ....... 
187 
182 
174 
160 
Ill 
80 
Carapace, exclusive of rostrum, .... 
357 
350 
367 
345 
381 
404 
Width of carapace between bases of antero-lateral spines, . 
194 
182 
148 
115 
101 
88 
Width of carapace between bases of posterodateral spines, . 
301 
289 
314 " 
249 
212 
158 
Length of abdomen including telson, 
382 
395 
403 
408 
435 
444 
Distance between submedian spines of telson, 
76 
85 
56 
67 
31 
24 
While Alima gracilis differs from ordinary Alimve in many respects, especially the 
.great elongation of the body, the shortness of the carapace, and the elongation of the 
telson, Claus has figured a series of Alimse which shows that the shorter and wider 
species are connected with the elongated ones by so many intermediate forms that there 
can be no doubt that the adults which they represent are all closely related. The 
Challenger collection also contains great numbers of these intermediate forms, and I 
give in PI. VII. fig. 7 and PL VIII. fig. 7 figures of the telson and the raptorial claw 
of one of them, which resembles Alima gracilis in the shape of its carpus, while its 
telson and the general outline of the body are so much like Faxon’s larva as to indicate 
that it is the young of a species of Squilla very closely related to Squilla nepa. A 
number of specimens of this larva were collected by the Challenger on April 13, 1876, 
near Sierra Leone. The carapace makes about half the total length of the body, and 
it exposes the posterior end of the sixth thoracic somite, while the tips of its postero- 
lateral spines, each of which has a small secondary spine about midway between the 
base and the tip, extend backwards to the plane of the suture between the first and 
(ZOOL. CHALL. EXP. PART XLV. 1886.) ’ Yy 12 
