REPORT ON THE CRUSTACEA MACRTJRA. 7.-, 



I. Those corresponding to the "Langoustes ordinaires" of Milne-Edwards, including 

 the subgenus Palinurus of Gray. This lie again subdivides into — 



A. Those which have the rostrum dilated, bipartite, having the processes flat, 



with the anterior margin spinulose, of which Palinurus trigonus, De Haan, 



(Linuparis trigonus, Gray) is the type. 



B. Those which have the rostrum simple, acute, and spiniform. This division 



is again subdivided into- — 



A. Those which have the first pair of pereiopoda longer than the 



succeeding pairs — Palinurus longimanus, Edw. 



B. Those which have the first pair of pereiopoda equal to or shorter than 



the succeeding pairs — 



a. Those which have the somites of the pleon with a transverse 

 furrow. This is again divided into — 



a Those which have the lateral frontal horns unarmed 

 above and denticulated below — Palinurus vulgaris. 



b Those which have the lateral frontal horns 

 unarmed above and below — Palinurus lalandii, 

 Lam. ; Palinurus frontalis, Edw. 



/?. Those that have the somites of the pleon not transversely 

 furrowed — Palinurus hiigelii, Heller. 



II. Those which correspond with the " Langoustes longicornes " of Milne-Edwards 

 and the subgenus Panulirus of Gray. These he again divides into — 



A. Those that have no transverse furrow on the pleon, the species of which 



are Palinurus fasciatus, Fabr. ; Palinurus ornatus, Bosc ; Palinurus 

 sulcatus, Lam. 



B. Those which have a transverse furrow. 



a. The first antennal somite armed with two teeth — Palinurus 

 guttatus, Latr. ; Palinurus japonicus, De Haan. 



