REPORT ON THE CRUSTACEA MACRURA. 211 



have been broken off, an accident which might very easily happen. Latreille has repre- 

 sented, under the name of Palemon (V) asper, one of the figures of Squilla groenlandica, 

 Seba, reproduced in the Atlas of the Encyclopedia Methodique (pi. ccxciii. fig. 3, expli- 

 cation, p. 3), and finally, the same figure has again been reproduced by Latreille, in his 

 Histoire naturelle des Crustaces et des Insectes, under the name of Crangon boreal, in pi. 

 liii. fig. 3, and under the name of Pence boreal in the text (vol. vi. p. 250)." 



The genus thus appears to inhabit regions so widely apart as Greenland in the north, 

 the Bermudas and Mediterranean in the west, and the southern coasts of India and the 

 Fiji Islands in the east. It has been found in the cold water of the Arctic regions as 

 well as in the warm shallow waters of the Tropics, but despite this cosmopolitan range 

 it has not been recorded as having existed in any geological formation. 



The species Stenopus spinosus, Eisso, from the Mediterranean, according to Milne- 

 Edwards, differs from Stenopus hispidus only in the absence of a median row of spines 

 upon the external surface of the propodos of the large chelate pereiopod. 



Stenopus hispidus (PL XXX.). 



Stenopus hispidus, Olivier, Eneyclop., vol. viii. p. 666. 



„ „ Latreille, Regne anim. de Cuvier, ed. 2, vol. iv. p. 93. 



,, ,, Desmarest, Consid. sur les Crust, p. 227. 



„ „ Milne-Edwards, Regne anim. de Cuvier, Crust., ed. 3, pi. 1. fig. 2 ; Hist. Nat. 



Crust., vol. ii. p. 407, pi. xxv. fig. 1. 

 Dana, U.S. Esplor. Exped., p. 607, pi. xl. fig. 8. 



Entire animal covered with small, sharp, strong spines, vertical on the carapace and 

 dorsal surface of the first three somites of the pleon, almost horizontal and directed 

 posteriorly on the three posterior somites and telson. The peduncle of the second pair of 

 antennae is furnished with spines, so are the third pair of pereiopoda, and the basisal 

 joints of the pleopoda ; all the other appendages are smooth. 



The posterior two pairs of pereiopoda are multiarticulate from the commencement of 

 the carpos to the extremity of the propodos. The third or largest pair of pereiopoda is 

 very long and freely covered with teeth, which run in several longitudinal rows, 

 those of the upper and lower margins being laterally compressed and closely implanted, 

 longitudinally touching each other at their base, the apex of each tooth being directed 

 toward the dactylos. The pollex is furnished with two cusps with a cleft between them, 

 into which fits a broad sharp cusp attached to the dactylos. 



Habitat. — Kandavu, Fiji Islands, Bermuda, shallow water. 



This species has long been known, but though attracting attention from its peculiar 

 formation, was described only according to its external characters until Professor Huxley 

 examined the nature of its branchial apparatus. 



