MODIFICATION OF THE EYE PEDUNOLKS IN OYMONOMUS. 461 



" warm area " to the south of the " Wy ville- 

 Thorason Ridge." 



2. Cymonomus granulatus, Norman. 



a. In many " Porcupine " dredgings in 1869 off 



the west and south-west of Ireland, in 106 — 



1350 fathoms. 

 h. Off the coasts of Spain and Portugal, dredged 



by the '^Porcupine," 1870, " Ti-availleur/' 



"Talisman," and " Hirondelle." 



c. Northern Mediterranean, off the south of France 



and off Corsica, " Travailleur," 1881. Southern 

 Mediterranean, "Porcupine," 1870; Station 

 56; lat. 37° 3' N., long. 11° 36' E., that is near 

 the island Pantellaria, between Tunis and Sicily, 

 in 390 fathoms. 



d. African coast. Taken by the " Talisman " more 



than twenty degrees south of the Mediterranean, 

 off Arguin, lat. 21° 53' N., in 655 metres. 



3. Cymonomus quadratus, A. Milne-Edwards, 1880. 



Among the West Indian islands, in 175 — 508 

 fathoms. 



The number of species of Crustacea Brachyura rapidly 

 diminishes as we descend in our investigations into the 

 depths of the ocean ; and it is worthy of notice here that the 

 only species, I believe, which have as yet been found in 

 depths exceeding 1000 fathoms belong to genera allied to 

 Cymonomus, as will be seen in the following list. 



Cymonomus granulatus (Norman), as 



above ..... 1380 fathoms. 



Etliusa microphthalma, S. I. Smith. 



U.S. Fish Comm. dredgings, 1884 . 1047 „ 

 "Challenger". . . . lOOO 



Ethusina abyssicola, S. I. Smith. 



" Albatross," 1883, Atlantic . 1497—1735 „ 

 "Talisman" .... 4060 metres. 



