MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 93 



MUNNOPSIDJE. 



All the genera of Munnopsidse are eyeless, and inhabit deep water in all the oceans. There 

 are five or more genera (Desmosoma, Munnopsis, Ilyarachna, Eurycope, Acanthocope) and more 

 than thirty species described. 



Examples of some of these are the following : 



Eurycope robusta Harger. Gulf of St. Lawrence, 220 fathoms, muddy bottom. 

 Eurycope cornuta Sars. Norwegian coast. 



Eurycope phalanginm Sars. 30 to 60 fathoms, mud; Gulf of Christiania. 

 Eurycope mutica Sars. 30 to 60 fathoms, mud ; Gulf of Christiania. 

 Eurycope giyantea Sars. Arctic Sea. 

 Eurycope latirostris Sars. Norway. 



Ilyarachna sp. Harger. 106 fathoms, mud ; 21 miles east of Cape Cod. 

 Ilyarachna longicornis Sars. 30 to 50 fathoms, mud ; Gulf of Christiania. 

 Ilyarachna hirsutus Sars. 30 to 50 fathoms, mud; Gulf of Christiania. 

 Desmosoma lineare Sars, 15 to 50 fathoms, mud ; Gulf of Christiania. 

 Desmosoma armatum Sars. 15 to 50 fathoms, mud ; Gulf of Christiania. 

 Desmosoma aculeatum Sars. 15 to 50 fatboms, mud ; Gulf of Christiania. 



ARCTURIDJE. 

 Arcturus myops Beddard. Southern Ocean, 700 fathoms. Eyes rudimentary. 



ANCEID^. 



Anceus stygius G. O. Sars. No eyes. North Atlantic, 600 to 1,200 fathoms. 

 A. bathybius Beddard. No eyes. Atlantic, 900 fathoms. 



CYMOTHOHLE. 



Harponyx pranizoides G. O. Sars. No eyes. North Atlantic, 100 fathoms. 

 Anuropus branchiatus Beddard. Pacific, 1,000 fathoms. 

 Cymothw (Semper). 



ANTHURID^. 



Paranthura chiltoni Beddard. Southern Ocean, 700 fathoms ; and undoubtedly other species of the family. 

 tenuis G. O. Sars. Norway, 150 to 200 fathoms off Lisbon, 718 fathoms (Norman and Scebbins). 

 Anthelura elongata Norm. Off coast of Portugal, 740 fathoms. 



abyssorum Norm, and Stebb. Near entrance of Davis Strait, 1,750 fathoms (Norman and Stebbins). 

 Hyssura producta Norm, and Stebb. North Atlantic, 1,450 fathoms (Norman and Stebbins). 

 Calalhura brachiata. North Atlantic, 20 to 1360 fathoms (Is this blind?) (Norman aud Stebbins, etc.). 



IDOTELDJE. 



Glyptonotus megalurus G. O. Sars. North Atlantic, 1,000 to 1,700 fathoms (G. O. Sars). 



ASELLID.ffi. 



Janira abyssicola Beddard. No eyes. Pacific, 1,350 fathoms. 



lolanthe acanthonotus Beddard. No eyes. Pacific, 1,670 fathoms. 



TrichopJeon ramosum Beddard. No eyes. Pacific, 500 fatboms. 



Neasellus kerguelenensis Beddard. No eyes. Southern Ocean, 100 to 600 fathoms. 



Anthoniscula typhlops G. O. Sars. North Atlantic, 450 fathoms. 



SEROLIDiE. 

 Serolis antarcta Beddard. No eyes. Southern Ocean, 400 to 1,600 fathoms. 



The eyes of the shallow- water species are well developed ; those of the abyssal are more or 

 less imperfect, without retinula, or even altogether wanting, as in 8. antarcta (F. E. Beddard, 

 Zool. Challenger, xi, Zool. Bee, 1884). 



