SHALLOW-WATER STARFISHES 6l 



pedicellarise ; marginal spines longer; rows mostly simple; no 

 peractinal spines. 

 L. coei Ver., sp. nov., p. 123. Off Berg Bay, Alaska. 



tt. Dorsal spines longer, scattered; one or two to a plate, except in evident 

 median radial row. Inferomarginal row double, two to a plate, 

 longer than dorsals, subacute; superomarginal row simple; three 

 interactinal rows proximally, one spine to a plate. 

 L. macouni Ver., sp. nov., p. 124. Vancouver I. >-* -fa 



ttt. Dorsal spines mostly clustered, several on each plate. 



u. Rays six or seven, elongated. Dorsal spines small, obtuse, arranged in 

 five longitudinal ranges of groups, each group with three or four 

 spines ; others are on the transverse ossicles, so that they form " a 

 vague reticulation." Ventral spines in two rows, pointed, longer 

 than adambulacrals. 

 L. vancouveri (Per.), p. 125. Vancouver I. ^t*V*f- 



uu. Dorsal spines small and numerous, all of about the same height, usually 

 clavate, obtuse, standing in crowded rows. Marginal and inter- 

 actinal spines notably longer, forming three to five or more close 

 rows. 



v. Dorsal spines small, slender, subequal, mostly clavate, not much crowded, 

 standing singly or in small groups on the ossicles, forming median 

 radial rows, and sometimes subradial series. Major pedicellariae 

 few, rather large, long, ovate. 

 L. hexactis (St.), p. 126. Calif, to Brit. Columbia. V/Jr, 



w. Dorsal spines mostly capitate, very small and very numerous, standing in 

 large groups on each plate, about equal in height, and thus pre- 

 senting a nearly even surface. Papular pores in nearly regular 

 radial rows. Marginal and interactinal spines much longer, often 

 bent, numerous, arranged in regular rows. Peroral spines strong. 

 L. aqualis (St.), p. 128. Calif, to Puget Sd. 



w. Dorsal spines very short, equal, clavate or capitate, crowded, many on each * ~ 

 plate. Marginal and interactinal spines form about four rows. 

 Rays short, obtuse. 

 Var. nana Ver., nov., p. 132. California; Oregon; British Columbia. 



ww. Dorsal spines very numerous and crowded on the plates, distinctly 

 capitate, with rounded tips. Marginal and interactinal spines more 

 numerous, forming five to eight rows, several on each plate. 

 Var. compacta Ver., nov., p. 130. California. 



www. Dorsal spines very numerous, crowded, the clusters arranged in three 

 or five radial bands separated by rows of very distinct papular areas. 

 Var. concinna Ver., nov., p. 132. California. 



rr. Rays normally six, sometimes five, of moderate length, thick or wide at 

 base, not slender, rather obtuse; disk somewhat wide or swollen, 

 skeleton firm; principal dorsal ossicles rather large. 



x. Dorsal ossicles not very closely united, irregularly reticulated, covered with 

 numerous short, mostly capitate or clavate spines, usually reticulate 

 in arrangement, often showing a more or less evident median row 

 or band ; three rows of interactinal spines often present proximally 

 in adult, only one in small specimens. Adambulacral spines irregu- 



