On two new species of SpongesPublished in Proceedings of the Boston Society of Natural History, in 1851, in volume 3, pages 67-68[The type of a new genus, allied to Pentagonaster, Gray.]Published in Proceedings of the Boston Society of Natural History, in 1851, in volume 4, pages 118-119
[The type of a new genus, allied to Pentagonaster, Gray.]Published in Proceedings of the Boston Society of Natural History, in 1851, in volume 4, pages 118-119