REPORT ON THE CRUSTACEA MACRURA. 



85 



the European shores including those of the Mediterranean. Palinurus longimanus 

 comes from the West Indies. Palinurus trigonus, v. Siebold, from Japan, belongs to 

 Gray's genus Limiparis, no species of which is in the Challenger collection. 



Fig. 7. — Dorsal view of Palinurus vulgaris. 



Fig. 8. — Lateral view of same. 



The nearest approach in geological time is the little Palinurina pygmasa described by 

 Miinster, from specimens found in the upper White Jura of Bavaria, and Palinurus 

 longipes, Miinster, from the Lias of England and the lithographic stone of Solenhofen. 



Palinostus, 1 n. gen. 



This genus consists of those species that have the rostrum anteriorly produced so as 

 to reach beyond the ophthalmic somite, and by its connection with the somite that carries 

 the second pair of antennae forming a channel for the protection of the ophthalmic 



Fig. 9. — Dorsal view of Palinostus lalandii. 



Fro. 10. — Lateral view of same. 



somite. The somite that carries the first pair of antennae is not produced beyond the 

 extremity of the rostrum (see accompanying woodcuts, figs. 9, 10). First pair of antenna? 

 furnished with two short flagella. Palinostus lalandii (Lamarck), Palinostus frontalis, 

 (Milne-Edwards), Palinostus hugelii (Heller). 



1 Tlechitorros, returning or going back, from a tendency to return to a form of Macrura in which the rostrum is 

 common ; chosen from a desire to secure a name that approximates in sound to that which it previously possessed. 



