86 
THE VOYAGE OF H.M.S. CHALLENGER. 
Alima gracilis. 
Measurements. 
In millimetres. 
In thousandths of total length. 
No. 1. 
No. 2. 
No. 3. 
No. 4. 
No. 5. 
No. 6. 
No. 1. 
No. 2. 
No. 3. 
No. 4. 
No. 5. 
No. 6. 
Measurements along middle line: — 
Total length from tip of rostrum to tip of 
telson, 
5-3 
6-9 
9’1 
11-54 
17-37 
42-83 
Total length of carapace including rostrum, 
2-8 
3-8 
5-04 
5-82 
8-34 
20T7 
532 
544 
541 
505 
492 
484 
Total length of rostrum, .... 
•96 
1-3 
1-6 
1-84 
1-92 
3-32 
182 
187 
174 
160 
110 
80 
From tip of rostrum to anterior edge of 
ocular somite, .... 
•96 
1-3 
1-6 
1-84 
1-92 
3-32 
182 
187 
174 
160 
110 
80 
From anterior edge of ocular somite to line 
joining bases of antero-lateral spines, 
■32 
•4 
•56 
•80 
•70 
1-66 
61 
58 
61 
69 
41 
40 
From line joining bases of antero-lateral 
spines to tip of labrum, 
•48 
•7 
1-2 
1-34 
3-68 
11 TO 
91 
104 
131 
117 
212 
266 
From tip of labrum to anterior edge of 
third thoracic somite, .... 
■64 
•8 
•9 
1-20 
1T2 
2-07 
122 
116 
96 
104 
64 
50 
Third thoracic somite, .... 
•05 
•08 
•08 
TO 
T3 
•41 
9 
12 
8 
8 
7 
10 
Fourth thoracic somite, .... 
■10 
T1 
T1 
T3 
T3 
1T0 
18 
16 
12 
11 
7 
26 
Fifth thoracic somite, .... 
•11 
T6 
T9 
•26 
•38 
1-41 
21 
23 
21 
22 
22 
34 
Sixth thoracic somite 
•14 
T9 
•22 
•37 
•54 
1-41 
27 
28 
24 
32 
31 
34 
Seventh thoracic somite, . . ... 
■19 
•22 
•27 
•40 
•58 
1-83 
36 
32 
30 
35 
33 
44 
Eighth thoracic somite, .... 
T9 
•29 
•35 
•40 
•64 
36 
42 
38 
35 
37 
From anterior edge of fourth thoracic to 
anterior edge of first abdominal somite, . 
•78 
1-06 
1-23 
1-65 
2-40 
6T6 
149 
153 
134 
143 
138 
148 
First abdominal somite, .... 
•29 
•35 
•51 
•64 
•90 
2-24 
55 
51 
56 
55 
52 
54 
Second abdominal somite, 
•30 
■37 
•51 
•64 
•96 
2-24 
58 
53 
56 
55 
55 
54 
Third abdominal somite, .... 
•26 
•37 
•48 
•56 
•96 
2-07 
58 
53 
52 
49 
55 
50 
Fourth abdominal somite, 
•21 
•21 
•37 
■54 
•90 
2T6 
39-49 
30 
40 
47 
52 
52 
Fifth abdominal somite, .... 
T3 
T4 
T9 
•45 
•64 
1-90 
24 
21 
21 
39 
37 
46 
Sixth abdominal somite, .... 
•22 
•83 
19 
20 
Telson on middle line, .... 
■90 
1-20 
V 65 
1-65 
3-20 
7-05 
170 
174 
178 
143 
i84 
196 
Total length of abdomen and telson, . 
2-08 
2-64 
371 
4-70 
7-55 
18-51 
395 
382 
408 
408 
435 
444 
Total length of body on middle 
line, ..... 
5-26 
6-91 
9T8 
11-54 
17'38 
42-83 
1000 
1000 
1000 
1000 
1000 
1000 
Measurements of carapace: — 
Total length on middle line including 
rostrum, 
2-8 
3-76 
5-04 
5-82 
8-34 
20T7 
540 
548 
541 
505 
492 
484 
Length of rostrum, ..... 
•96 
1-30 
1-6 
1-84 
1-92 
3-32 
182 
187 
174 
160 
110 
80 
Length of antero-lateral spines, 
•40 ' 
•53 
•67 
•72 
•84 
1T6 
076 
76 
73 
62 
48 
28 
Length of postero-lateral spines, 
0-72 
•93 
1-44 
1-84 
1-76 
2 ’49 
287 
134 
157 
160 
101 
55 
Width at bases of antero-lateral spines, 
•96 
1-34 
1-36 
1-33 
1-76 
3-65 
182 
194 
148 
115 
101 
88 
Width at bases of postero-lateral spines, . 
1-52 
2-08 
2-88 
2-88 
3-68 
6-64 
289 
300 
314 
250 
212 
158 
Width of seventh thoracic somite, 
■32 
•51 
•51 
•48 
1-00 
46 
55 
44 
28 
24 
Width of eighth thoracic somite, . 
•27 
•32 
•51 
•56 
•51 
1T6 
52 
46 
55 
48 
29 
28 
Width of second abdominal somite, 
•40 
•43 
•51 
•76 
•64 
1-66 
76 
61 
56 
67 
37 
40 
Width of fifth abdominal somite, 
•32 
0-43 
•40 
•75 
■64 
1 TO 
60 
61 
44 
65 
37 
46 
Greatest width of telson, .... 
•80 
1-02 
1-28 
1-60 
1-92 
3'57 
152 
148 
139 
139 
110 
86 
Distance between submedian spines of telson, 
•45 
•53 
•51 
■77 
•54 
1-00 
85 
76 
56 
67 
31 
24 
First pleopod, basal portion, 
•40 
•51 
•69 
•74 
1-00 
76 
56 
60 
43 
24 
First pleopod, exopodite, .... 
•25 
•51 
•51 
•70 
1-49 
46 
56 
44 
40 
36 
Second maxillipod, basal joint, 
•27 
•32 
•40 
•56 
■38 
1-00 
52 
46 
44 
49 
22 
24 
Second maxillipod, second joint, . 
•67 
•83 
1T2 
1-28 
1-92 
4-98 
128 
116 
122 
111 
110 
119 
Second maxillipod, third joint, 
•83 
1-09 
1-44 
1-60 
2-08 
5-23 
158 
144 
157 
139 
120 
125 
Second maxillipod, fourth joint, . 
•25 
•24 
•32 
■32 
■38 
•66 
46 
35 
35 
28 
22 
16 
Second maxillipod, sixth joint, 
1-28 
1-52 
2-24 
2-32 
3-20 
5-40 
243 
220 
244 
201 
184 
129 
Second maxillipod, dactyle, 
■83 
•93 
1-36 
1-20 
1-92 
3-65 
158 
134 
148 
104 
110 
88 
First antenna, first joint, .... 
T6 
•24 
•32 
•43 
•54 
1 41 
30 
35 
35 
37 
31 
34 
First antenna, second joint, .... 
T1 
T8 
•22 
■28 
•32 
•91 
21 
25 
14 
25 
18 
22 
First antenna, third joint, .... 
•21 
•24 
•29 
•32 
•38 
1-00 
52 
35 
31 
28 
22 
24 
First antenna, flagellum, .... 
•40 
•48 
•70 
•96 
1T2 
1-41 
76 
69 
77 
83 
64 
39 
Eye stalk, 
•32 
•56 
•64 
•72 
•96 
1-66 
61 
81 
62 
62 
55 
40 
Eye, 
•48 
•72 
•67 
•96 
1T2 
1-33 
91 
104 
65 
83 
64 
32 
fourth, and fifth are short, and wider than long, while the sixth, seventh, and eighth are 
elongated, and about as long as they are wide. The second antenna has a two-jointed 
