S. I. Smith — K'irl)/ Sf((f/et< of Hlppa talpolda. 841 



EXPLANATION OF PLATES. 

 Plate XLV. 



Figure L — Zoea in the second stage, ventral view, with the abdomen bent forward 

 beneath the cephalo-tlaorax so as to show the dorsal side of the terminal portion of 

 the abdomen, enlarged twenty -four diameters. 



Figure 2. — Zoea in the last stage, dorsal view, enlarged twelve diameters. 



Figure ?>. — The same, in the same position as in figure 1, ventral view, the natatory 

 Umbs omitted, enlarged twelve diameters. 



Figure 4. — The same, lateral view, enlarged twelve diameters. 



Figure 5. — Megalops just changed from the last zoea-stage ; dorsal view of anterior 

 portion of the animal showing the eyes, antennula;, antennae, and the extremities of 

 the first pair of thoracic legs, enlarged twenty-four diameters. The antennas are 

 shown fully extruded and the whole animal under slight compression. 



Figure 6. — One of the segments of the flagellum of an antenna, megalops-stage, seen 

 in transverse section to show the arrangement of the seta3, enlarged forty diameters. 



Plate XLVI. 



Figure 1. — Anteunula, second zoea-stage, enlarged seventy-five diameters. 



Figure 2. — Antenna of the right side seen from beneath, second zoea-stage, enlarged 

 seventy-five diameters: a, h, dentiform processes ; c, flagellum. 



Figure 3. — The same, third zoea-stage, enlarged seventy-five diameters; a, b, denti- 

 form processes ; c, rudimentary flagellum. 



Figure 4. — The same, last zoea-stage, enlarged forty diameters : a, b, dentiform pro- 

 cesses ; c, rudimentary flagellum showing the multiarticulate flagellum of the 

 megalops-stage already formed within. 



Figure 5. — Antennuhe and inner mouth appendages seen from beneath, last zoea-stage, 

 enlarged thirty-six diameters ; a. a, anteunulje ; b, labrum ; r, mandible ; d labium • 

 e, first maxilla. 



Figure 6. — Tips of the mandibles, last zoea-stage, enlarged 150 diameters. 



Figure 7. — Peduncle of the antenna seen from beneath, megalops-stage, enlarged 

 twelve diameters ; a, b, c, d. e, segments of peduncts ; /, supplementary rod or plate. 



Figure 8. — Labrum, labium and mandibles seen in place from beneath, megalops-stage, 

 enlarged seventy -five diameters ; a, labrum ; b, coronal portion of mandible ; c, d, 

 mandibular palpus ; e, labium. 



Figure 9. — Coronal portion of the mandible of another specimen in the same stao-e 

 enlarged 150 diameters. 



Figure 10. — Labrum, labium, and mandibles seen in place from beneath, adult female, 

 enlarged twenty -four diameters; a, labrum; h. sette-bearing tubercle above tlie 

 margin of the labrum; c, coronal portion of tlie mandible ; d, lateral spinous maro-iu 

 of the basal portion of the mandibular palpus ; e, terminal portion of the palpus : 

 /, labium; g, h, line of the section shown in figure 10a. The letter /;, is directlv 

 over the anterior extremit}^ of the elongated mouth opening. 1 Oa, outline of a 

 transverse section of the mandible through the line gh in figure 10 ; the dotted lines 

 representing the anterior edges of the appendage projected upon the section; r, tip 

 of the coronal portion of the niandilile ; ;/, lateral spinous margin of the palpus ; 

 Ji , inner extremity of the terminal portion of the palpus. 



Figure 11. — First maxilla of the left side seen from beneath, second zoea-stage. 

 enlarged seventy-two diameters ; « , inner lobe ; b, outer lobe ; c, palpus. 



Figure 12. — Same, last zoea-stage, enlarged seventy-two diameters. 



Figure 13. — Same, megalops-stage, enlarged seventy-five diameters. 



Figure 14. — Mandible of Hippa Asiatica, copied from DeHaan, Fauna Japonica, 

 Crustacea, Plate Q. 



Plate XLVTI. 



Figure 1. — Second maxilla of the left side seen from beneath, second zoea-stage, 



enlarged thirty-six diameters ; aprotognath; ft, scaphognath. 

 Figure 2. — Same, last zoea-stage, enlarged thirty-six diameters: «, b. protognath : 



c, scaphognath. 



