i — 
MEMOIES OF THE NATIONAL ACADEMY OF SCIENCES. 93 
MUNNOPSIDtE. 
All the genera of Munnopsidfe are eyeless, and inhabit deep water in all the oceans. There 
are five or more genera (Desmosoma, Mnnnopsis, Ilyarachna, Eurycope, Acauthocope) 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. 
Eurycopephalangium Sars. 30 to 60 fathoms, mud; Gulf of Christiania. 
Eurycope mutiea Sars. 30 to 60 fathoms, mud ; Gulf of Christiania. 
Eurycope gigantea 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 fathoms, mud; Gulf of Christiania. 
ARCTURID^E. 
Arclurm myops Beddard. Southern Ocean, 700 fathoms. Eyes rudimentary. 
ANCEIDAE. 
Anceus stygius G. O. Sars. No eyes. North Atlantic, 600 to 1,200 fathoms. 
A. bathybius Beddard. No eyes. Atlantic, 900 fathoms. 
CTMOTHOID^E. 
Harponyx pranizoides G. O. Sars. No eyes. North Atlantic, 100 fathoms. 
Anuropus branchiatus Beddard. Pacific, 1,000 fathoms. , 
Cymothce (Semper). 
ANTHURIDJE. 
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 Stebbins). 
Anthelura elongata Norm. Off coast of Portugal, 740 fathoms. 
abyssorum Norm, and Stebb. Near entrance of Davis Strait, 1,750 fathoms (Norman and Stebbins). 
Hyssuraproducta Norm, and Stebb. North Atlantic, 1,450 fathoms (Norman and Stebbins). 
Calathira brachiata. North Atlantic, 20 to 1360 fathoms (Is this blind?) (Norman and Stebbins, etc.). 
IDOTEIDiE. 
Glyptonotus meyalurus G. O. Sars. North Atlantic, 1,000 to 1,700 fathoms (G. O. Sars). 
ASELLIDA3. 
Janira abyssicola Beddard. No eyes. Pacific, 1,350 fathoms. 
lolanthe acanthonotus Beddard. No eyes. Pacific, 1,670 fathoms. 
Tricliopleon ramosum Beddard. No eyes. Pacific, 500 fathoms. 
Neasellus herguelenensis Beddard. No eyes. Southern Ocean, 100 to 600 fathoms. 
Anthoniscula typhlops G. O. Sars. North Atlantic, 450 fathoms. 
SEROLIDAE. 
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 eveu altogether wanting, as in 8. antarcta (F. E. Beddard, 
Zool. Challenger, xi, Zool. Eec., 1884). 
