THE ANNALS AND MAGAZINE OF NATUEAL HISTORY. [FIFTH SERIES.] No. 10. OCTOBER 1878. XXXII. — On the Willemoesia Group of Crustacea. By C. Spence Bate, F.R.Si* [Plate Xm.] Among the many objects of interest taken from tlie depths of the ocean during the cruise of the ' Challenger,' there were few that attracted more attention than the so-called blind Crustacea. These were described by Mr. Willemoes-Suhm rather fully both in ' Nature ' and in the * Transactions of the Linnean Society,' — in the pages of the former under the name of Dei-damia ; but in the latter Mr. Grote, having discovered that this name had been in use for a genus of Sphingidaj, changed it to Willemoesia^ in compliment to the unfortunate marine zoologist of the expedition. Soon after it had been publislied it was recognized by those who had given attention to the subject to resemble a small crustacean that Dr. Heller had described among the " Crus-taceen des siidlichen Europa," from a single male specimen in the collection of the museum at Vienna, to which he gave the name of Polycheles typhlops^ belonging to the same group. I believe that I am correct in stating that Mr. Wood-Mason was the first, in the ' Journal of the Asiatic Society ' for 1875, to point out the resemblance between of Polycheles of Heller and Willemoesia of the ' Challenger ' expedition. * Read at the Meeting of the British Afisociation at Dublin, on Mon-day, Aug. 19, 1878. Communicated by the Author, Ann. & Mag. N. Hist. Ser. 5. Vol. ii. 19
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