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Show 528 REV. T. R. R. STEBBING O N CRUSTACEANS [May 22, made by the printer to call this species " Erypodius Latreillia." In a preliminary catalogue of the Crustacea of the ' Magenta,' 1870, Tozzetti inadvertently referred it to Paramithrax peronii Milne- Edwards. The synonymy given above is additional (except for the first item) to the list of authorities supplied by Miers in 1881. Miers considers that one specific name should suffice for latreillii Guerin, 1828, tuberculatus Eydoux & Souleyet, 1841, audouinii Milne-Edwards & Lucas, 1843, septentrioncdis Dana, aud brevipes Dana, both dating from 1851. He does not make any reference to " Eurypodius Cuvieri, Audouin," the name attached by de Haan to figures of a first and a third maxilliped in plate H of his great work. Cunningham in 1871, as Miers notices, accepts four species of Eurypodius, though the former is doubtful whether septen-trionalis is distinct from audouinii, and not very sure about brevipes, nor does he name any character which he thinks trustworthy for separating any of the three from latreillii. Tozzetti unites septen-trionalis with audouinii, neither he nor Dana himself making any remark on the fact that in the figure of septentrionalis in Dana's Atlas, pi. 2. fig. 6 a, the points of the rostral horns are divergent instead of convergent. From Guerin's latreillii Tozzetti thinks it necessary to distinguish not only Dana's brevipes, but also Dana's latreillii, for which he proposes a new name, Eurypodius dance. But I am much disposed to regard this new species as founded on a misapprehension. In an elaborate comparison of the characters, Tozzetti states that of Guerin's latreillii the length is more than three inches, the rostrum one-fifth of the length of the shield, the last segment of the pleon in the male rounded; that of Dana's latreillii the length is doubtful, the rostrum one-fourth of the length of the shield, the last segment of the pleon triangular. But this is by no means an accurate account of what Dana says. He speaks distinctly of " a specimen an inch in length ;" in which he states that "the beak is about one-fourth the whole length of the carapace,"and that the last segment of the pleon in the male is subtriangular. Between specimens respectively an inch and three inches in length it is obvious that there may be many differences, without any of them being specific. Still it must be admitted that even a " sub-triangular " ending to the male pleon in latreillii would be very difficult to explain. It is very decidedly rounded in full-grown specimens. But we have to remember that the drawings for Dana's Atlas of Crustacea " were to a large extent made during the years 1838 to 1842, in the course of the cruise of the Expedition "; that after the engraving of the plates, and before their publication in 1855, a large part of the original drawings were destroyed by fire; and further, that before Dana's return to America many of the specimens had through ignorance been rendered to a great extent useless for scientific purposes. It is tolerably clear that, under these circumstances, in drawing up his descriptions he chose or was forced to rely, not on the specimens, but on his own drawings or the engravings from them. That this has happened in regard to |