74 G. M. Giles — Besoriptions of new Indt'aa AmpJiq^och. [iSTo. 1, 1890.] 



The first of the gnathopods is small, being no longer than the first 

 two joints of the peduncle of the superior antenna ; nearly half its length 

 is made up by the basipodite. The articulation between the ischiopodite 

 and meropodite is very oblique, and the appendage appears to consist of 

 but five pieces, owing probably to the dactylopodite being fused 

 with the propodite, the subchela being formed between these and the 

 dilated carpopodite. The second is very much larger than the first, being 

 nearly as long as the head and entire thorax ; it, however, resembles it 

 closely in general form, and like it is composed of but five pieces. 



The fourth and fifth thoracic appendages are subequal and exactly 

 similar, and have the distal extremities of their articuli dilated so as to 

 admit of very free flexion, but are otherwise of the usual ambulatory 

 type. In length they nearly equal the first six thoracic segments. The 

 sixth, seventh, and eighth much resemble the fourth and fifth but are 

 stouter built, and, while the sixth is only subequal to them, the seventh 

 is as long as the antennule, and the eighth as long as the antennule 

 except the last joint of the flagelUim, 



The first three abdominal appendages, though of the usual type, 

 are exceptionally small. The fourth is as long as the last joint of the 

 peduncle of the antennule, its propodite forming half its length. Its 

 rami are unequal, the outer being hardly more than half the length of 

 the inner, both rami and peduncle being armed with stout spines. 

 The fifth is only two-thirds the length of the fourth, but is stouter ; 

 like the fifth, its rami are unequal and spinose. The sixth is reduced 

 to a rudimentary tubercle, armed with one or two spines. 



EXPLANATION OF PLATE IL 



Fig. 1. Melita cotesi, x 20 ; In, 2nd and 3rd right thoracic appendages, x 10. 



Fig. 2. Fhoxus uncii'ostratus, x 15 ; 2a, mandible and appendage, x 30 ; 26, 

 the maxillae, x 120; 2c, the 6th abdominal appendage, x 30. 



Fig. 3. Ampelisca claleyi, x 7. 



Fig. 4. Lysianassa wood-masoni, x 10. 



Fig. 5. Anonyx indicus, x 12'5 ; 5a, distal joints of 3rd thoracic appendage, 

 X 50. 



Fig. 6. Parapleustes pictus, x 15. 



Fig. 7. Gyrtophium andamanense, x 25 ; 7a, flagellum of inferior antennae, 

 X 30 ; 7b, last three abdominal segments with appendages, x 30. 



