EXPLANATION OF PLATES. 



PLATE I. 



Figure i. Panulirus argus; Bermuda lobster. Ventral side of cephal- 

 othorax and limbs of male, 2/3 natural size. Photograph by A. H. 

 Verrill. 



PLATE II. 



Figure i. Panulirus argus; Bermuda lobster. Dorsal view of cephal- 

 othorax of male ; same specimen as shown on pi. I. About y 2 

 natural size. 



Figure 2. The same; distal part of legs; a, of second pair; b, of first 

 pair. Enlarged ; A. H. V. 



PLATE III. 



Figure i. Phyllosoma form of larva supposed to be that of Panulirus 

 argus. Same as pi. Ill A, fig. ab. From the Gulf Stream. Tips of 

 all the legs are broken off. 



Figure 2. The same in a later stage in which the uropods have become 

 free and rudimentary pleopods have appeared. Same specimen as 

 pi. Ill A, figs. 3, 3a ; a' antennule with a small branch to the flagellum ; 

 a" antenna; mp, third maxilliped ; ab, abdomen; p"" leg of fourth 

 pair; pv, rudiment of fifth leg. Original. A. H. V. 



PLATE III A. 



Figure I. Phyllosoma form of larva supposed to be of Palinurus argus. 



Youngest stage observed by me ; a, antennule ; a', branch of flagellum ; 



a", antenna ; o, eye ; oc, median ocellus ; g, green gland. 

 Figure 2. The same specimen ; ab, abdomen ; pv, rudiment of leg of 



fifth pair ; u, t, rudiments of uropods and telson seen within the 



integument. A. H. V. 

 Figure 2b. The same, another example a little more advanced ; same as 



pi. Ill, fig. i. Letters as in fig. la. Original. A. H. V. 

 Figure 3. The same, a somewhat older larva, the same as pi. Ill, fig. 2. 



Letters as in fig. i. 

 Figure 3a. The same specimen; abdomen, ab, and fifth pair of legs, pv, 



which have become longer and two-jointed, while the uropods and 



telson have become free. Original. By A. H. V. 

 Figure 4. A very different Phyllosoma larva referred by Bate to Panu- 



lirus, but perhaps a different genus. Although its fifth pair (pv) of 



legs are well developed the abdomen and its appendages are less 



