MUSEUM OF COMPARATIVE ZOOLOGY. 261 



Ophiacantha millespina Vll. 



Station 303, 41° 34' 30" N., 65° 54' 30" W., 306 fathoms. Station 306, 

 41° 32' 50" N., 65° 55' W., 524 fathoms. 



Ophiacantha hirsuta Ltm. 



Station 155, Montserrat, 88 fathoms. Station 156, Montserrat, 88 fathoms. 

 Station 212, Martinique, 317 fathoms. Station 215, St. Lucia, 226 fathoms. 

 Station 223, St. Vincent, 146 fathoms. Station 232, St. Vincent, 88 fath- 

 oms. Station 268, Grenada, 955 fathoms. Station 269, St. Vincent, 124 

 fathoms. Station 273, Barbados, 103 fathoms. Station 293, Barbados, 82 

 fathoms. Station 300, Barbados, 82 fathoms. Entrance to Port Koyal Har- 

 bor, Jamaica, 100 fathoms ; sp. ? 



Ophiacantha sertata Ltm. 



Station 148, St. Kitts, 208 fathoms. Station 164, Guadeloupe, 150 fathoms. 

 Station 187, Dominica, 411 fathoms. Station 208, Martinique, 213 fathoms. 

 Station 240, Grenadines, 164 fathoms. Station 241, Grenadines, 163 fath- 

 oms. Station 249, Grenada, 262 fathoms. Station 274, Barbados, 209 fath- 

 oms. Station 280, Barbados, 221 fathoms. Station 291, Barbados, 200 fathoms. 

 Station 297, Barbados, 123 fathoms. 



Ophiacantha vepratica Ltm. 



Station 151, Nevis, 356 fathoms. Station 204, Martinique, 476 fathoms. 

 Station 205, Martinique, 334 fathoms. Station 226, St. Vincent, 424 fath- 

 oms. Station 260, Grenada, 291 fathoms. Station 264, Grenada, 416 fathoms- 

 Station 288, Barbados, 399 fathoms. 



NOTES ON OPHIACANTHA. 



Ophiacantha scutata Ltm. 



The numerous individuals brought back by the second " Blake " expedition 

 show some variations from the original figure (Bull. M. C. Z., V. 9, PI. I. 

 Figs. 1-3). Usually the radial shields are not naked, but beset, like the rest 

 of the disk, with minute stumps. There often is an extra mouth-papilla on 

 each side ; and higher up in the mouth-slit there may be a pair of scales be- 

 longing to the second mouth-tentacles. This last feature exists also in O. 

 cosmica, a kindred species, but readily distinguished by the wide separation of 

 the lower arm-plates. 0. scutata has commonly only one tentacle-scale on the 

 first pore, as on those beyond. 



Station 134, Santa Cruz, 248 fathoms. Station 147, St. Kitts, 250 fathoms. 



