PLATE I. 
Diam. 
Page 
Fig. 1. 
Stenorhynchus falcifer, Stimpson, adult male, . 
X 
2 
6 
Fig. la. Lateral view (in outline) of the carapace, 
X 
3 
Fig. lb. Exterior view of a chelipede, .... 
X 
3 
Fig. 2. 
Stenorhynchus spinifer , n. sp. ; dorsal view of part of the carapace 
and rostrum ; considerably magnified, 
7 
Fig. 2a. Inferior view of part of the carapace and rostrum of Stenorhynchus 
spinifer; considerably magnified. 
Fig. 3. 
Achseus tenuicollis, n. sp., adult male, .... 
X 
3 
9 
Fig. 3a. Lateral view of carapace (in outline), 
X 
Fig. 3 b. Inferior view of the rostrum and antennal region of the same species, 
X 
7 
Fig. 3c. Chelipede of the same species, .... 
X 
4 
Fig. 4. 
Achseopsis spinulosus, Stimpson, adult female, 
X 
3 
18 
Fig. 4a. Inferior view of the cervical region of the same species, 
X 
5 
