66 THE AMERICAN ARBACIA 



in family Echinometridae. Southern Japan, Misaki. Egg loo y. (Moto- 

 mura, 1950 unpub.) ; 95.5 pL (Dan, 1952 unpub.). M III, 3 : 328. 



Sphaerechinus granulans (Lamarck). Mortensen places this with Trip- 

 neustes and Lytechinus in family Toxopneustidae. Large form, may be 

 16 cm. Mediterranean, Naples, Nice, Channel Isls. Guernsey to Cape 

 Verde, Spain, Portugal, Azores, Madeira, Canaries. Egg 98 fi (E. B. H., 

 1933a; 1938a). M III, 2 : 515. 

 Family 4 Echinometridae, usually elongate, elliptical 



Echinometra lucunter (Linne) (E. subangularis (Leske)). Known as "rock" 

 or "reef" urchin. Bermuda, West Indies, Jamaica, Florida to Brazil, 

 Mexico, West Africa, Dakar to Angola. Egg 80 pi, 95 [jl Tortugas (Leitch, 

 1 934a; 1 936) ; 85 pL and 97 (jl Bermuda (E. B. H., 1947 unpub.); 120 pi 

 Tobago (Mortensen, 1921, p. 71). M III, 3 : 357. 



Echinometra viridis A. Agassiz. Southern Florida, Tortugas, Cura9ao, Vene- 

 zuela, Greater Antilles, St. Thomas. M III, 3 : 368. 



Echinometra mathaei (Blainville). Clark says this is the most abundant sea 

 urchin in the world. Indo-West Pacific, Suez to Hawaii, Egypt, E. African 

 coast to Durban, Madagascar, Ceylon, Torres Strait, Murray Isl., Australia, 

 Samoa, Japan, Seto, etc. M III, 3 : 381. 



Echinometra vanbrunti A. Agassiz. Rock- borer. West coast of North Ame- 

 rica from central California to Peru, Mazatlan, Mexico; Gulf of California 

 Gulf of Panama. M III, 3 : 373. 

 Order III Exocycloida 



Suborder A Clypeastrina. Usually flattened. 

 Family i Clypeastridae 



Clypeaster rosaceus (Linne). N. Carolina, Florida to Brazil, Tortugas, Baha- 

 mas, West Indies, Puerto Rico, Jamaica, Barbadoes, Curasao. Egg 200 pL 

 (in Bouin) (Gardiner, 1927). M IV, 2 : 40. 



Clypeaster subdepressus (Gray). Florida, Tortugas, West Indies, Jamaica, 

 Brazil. M IV, 2 : 112. 



Clypeaster japonicus Doderlein. Southern Japan, Misaki. Egg 125 pi (Moto- 

 mura, 1950 unpub.); 115.3 1^ (Dan, 1952 unpub.). M IV, 2 : 99. 

 Family 2 Laganidae 



Peronella (Laganum) lesueuri (A. Agassiz) or (Valenciennes). Confusion of 

 species and several varieties. Australia, Torres Strait, Japan, Misaki, China. 

 Egg 300-400 pL (Mortensen, 1921, p. iii; Tennent, 1924); 276 pt (Dan, 

 1952 unpub.). M IV, 2 : 263. 

 Family 3 Fibulariidae 



Echinocyamus minutus (Pallas) (E. pusillus (O. F. Muller) is Mortensen's 

 preference). Iceland, Norway, Sweden, Scotland, England, Plymouth, 

 Ireland, Mediterranean, Naples, Marseilles, North Africa, Azores. Egg 

 88 pi (Theel, 1892). M IV, 2 : 178. 

 Family 4 Scutellidae "Sand dollars" 



Echinarachnius parma (Lamarck). East Coast Labrador to Maryland, Maine, 

 Woods Hole, West Coast Alaska to Puget Sound, Aleutian Islands, Japan. 

 Egg 145 pi (E. B. H., 1942). M IV, 2 : 367). 



Dendraster (Echinarachnius) excentricus (Eschscholtz). Pacific Coast, Alaska 

 to Lower California, Nanaimo. Egg Pacific Grove 120 pi (Snyder, 1925; 

 Chase, 1935); 115 pi. (Needham and Needham, 1930); Corona del Mar 

 ii4pL (Tyler, 1937). M IV, 2 : 382. 



Mellita quinquiesperforata (Leske) (M. pentapora (Gmelin), M. testudinata 

 Klein). 5 holes in test. Known as the "keyhole urchin." Vineyard Sound 

 to Brazil, Florida, Bermuda, Jamaica, Puerto Rico, Mexico. Egg Ber- 

 muda? no pi (Crozier 1918); Beaufort 150 pi (E. B. H., 1942 unpub.). 

 M IV, 2 : 422. • 



