EROM SINGAPORE AND NEW ZEALAND. 209 



especially as in all the species of Amphithopsis the outer ramus of the third uropods is 

 considerably shorter than the inner, while here, as in Pherusa fucicola, they are equal. 



EXPLANATION OF THE PLATES. 



PLATE XXXVIII. 



Byblis kallarthrus, n. sp. 

 The full figure is given in lateral view, with a line above it indicating the natural 

 size. 



oc. Lateral view of the front of the head, showing two of tbe eyes ; the 



first joint of the upper antenna? in position. 

 a.i. First three joints of one of the lower antenna?. 



m. The left and right mandibles respectively, at the left and right lower 

 corners of the plate ; the cutting-edges, spines, and molar tubercles 

 more highly magnified. 

 Li. Lower lip. 

 mx. 1. First maxilla, the apical portions more highly magnified. 

 mx. 2. Second maxilla. 

 mxp. Maxillipeds ; part of the outer plate and the termination of the palp 



more highly magnified. 

 gn. 1. First gnathopod. 

 gn. 2. Second gnathopod. 

 prp. 1, 2, 3, 4, 5. The first, second, third, fourth, and fifth perseopods respectively ; the 

 apical spines of the fourth joint of the fourth pera?opod more 

 highly magnified. 

 ur. 1, 2, 3. The first, second, and third uropods respectively. 

 T. Telson. 



PLATE XXXIX. 



Fig. A. Talorchestia tumida, <s , n. sp. 

 The full figure is given in lateral view, with a line above it indicating the natural 

 size. 



a.s. One of the upper antenna?. 

 a.i. One of the lower antenna?. 

 mx. 1. First maxilla; the apical portions more highly magnified. 

 mxp. Maxillipeds. 



