412 



DISCOVERY REPORTS 



oldest stage, and this one is not in some respects so advanced as the oldest of Form A, 

 so that there may be another later stage. Stage V was abundant at St. 692 (thirty-one 

 specimens) and showed a range of size from 7 to 1 1 mm. There is considerable difference 



Table IV. Measurements {in mm.) of Phyllosomas belonging to Panulirus, Form A 



between the smallest and largest with regard to the development of antennae and the 

 rudiment of the uropods, but they grade into one another and there is no evidence for 

 a moult separating them into two stages. Measurements of the specimens are given in 

 Table V. 



Table V. Measurements {in mm.) of Phyllosomas belonging to Panulirus, Form B 



Stage V? (Fig. 21). Length 7-1 1 mm. 



Fore-body very narrow, much narrower than hind-body. Hind-body deeply concave 

 behind. Abdomen very small, unsegmented, and without trace of pleopods. The uro- 

 pods are represented by an inconspicuous fold or by a pair of distinct lobes. 



Peduncle of antennule of three segments. Antenna shorter than peduncle of anten- 

 nule, or, in larger specimens, considerably longer. 



