OCR Text |
Show 428 PROF. F. J. BELL ON THE ECHINOMETRIDsE. [Mar. 15, and Feilden collected them at Franklin-Pierce Bay, Cape Napoleon, and Hayes Point, during the Arctic Expedition of 1875-76 ; Capt. Markham found specimens at 73° 10' lat., 53° long. ; the officers of the 'Valorous' Expedition collected specimens off Greenland. Other examples have lately been received from the United States Fishery Commission, which collected them at Eastport, Maine. STRONGYLOCENTROTUS ERYTHROGRAMMUS. Absolute diameter, in millim. 27-5 35 57 57 100 Percentage value of Height. 47-2 40 47-3 45-6 48 Actinostome. 309 31-5 30-7 29 Abactinal system. 18-1 20 19-3 19-3 13 Anal area. 905 8-5 9-2 10-9 » 7-5 STRONGYLOCENTROTUS FRANCISCANUS. Absolute diameter, in millim. 90 110 Percentage value of Height. 55-5 46-46 Actinostome. 25-5 30-9 Abactinal area. 23-7 18-1 Anal area. 10 STRONGYLOCENTROTUS GIBBOSUS. This species, obviously, does not lend itself to proportional measurements. STRONGYLOCENTROTUS LIVIDUS. Absolute diameter, in millim. 24-5 34 38 60 63 Percentage value of Height. 50 47 47-3 55-5 49-2 Actinostome. 36-7 32-3 31-5 29-1 301 Abactinal area. 22-8 20-5 19-2 18-3 16-6 Anal area. 12 8-7 9-8 10 1 Madreporic plate considerably swollen. |