LORICATA — THE ROCK LOBSTER 



165 



Tribe 5. Loricata. 



The Loricata include the Laiigouste {Palinurus) of the Mediter- 

 ranean coasts, which replaces there the Lobster of the North Sea 

 as an article of food, and the peculiarly shaped Scyllarus archie 

 (Fig. Ill), which is also prized in the Mediterranean as a delicacy. 

 The bright red " Crayfishes," Panulirus and lasus, of the Australian 



Fig. 111. — Dorsal view of Scyllarus ardus, 

 X 5. (From an original figure prepared 

 for Professor Weldon.) 



Fig. 112. — Embryonic area of developing 

 Palinurus quadricornis. Ab.l, 1st alxlo- 

 minal segment ; E, compound eye ; E', 

 median simple eye ; L, upper lip ; L' , 

 lower lip ; M, niandihle ; Mx.l, Mx.2, 

 1st and 2nd maxillae ; Mxp. 1, 1st maxilli- 

 pede ; T, 6tli (antepenultimate) thoracic 

 appendage. (After Claus.) 



coasts are also largely used as food. Besides its peculiarity in 

 shape, S. archis has remarkable scales on the second antennae in 

 place of flagella. The larva hatches out as the so-called Phyllo- 



barred, lined, or monochrome colour-pattern may be present, which is ultimately 

 induced by the nature of the environment, and does not subsequently change. In 

 other species of Hippolyte, and in Palacmon and Crangon, only one adult colour- 

 pattern occurs. Thus H. varians, besides reacting to light by its chromatophores, 

 possesses a permanent colour-pattern, which is also determined by environment. 



