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POFULAR SCIENCE REVIEW. 
Museum of Comparative Zoology,” in which, under the heading of “ Notes 
on Nomenclature,” his peculiar views are expressed. It is remarkable that 
some years ago, the American Association for the Advancement of Science 
appointed a committee to reconsider the canons of biological nomenclature, 
and to report whether, with the growth of science, they required any 
additions or alterations. No report has yet been made, nor, so far as we are 
aware, is any likely to he presented, until the subject is again brought 
prominently forward and new instructions given. Professor A. E. Verrill 
has since republished the Revised Rules of Zoological Nomenclature 
adopted by the British Association for the Advancement of Science in 1865, 
and has accompanied them by a few apt comments : in England, Mr. W. F. 
Kirby, in a paper read before the Linnean Society of London, has called 
attention to the extensive changes which a strict adherence to the laws of 
priority would cause in the generic nomenclature of butterflies ; and quite 
recently has put the same into practice in his catalogue of these insects. 
A New Crustacean : Tomocaris Peircei has been discovered by Professor 
Agassiz. This, which is named as above, was dredged in 45 fathoms about 
40 miles east of Cape Frio. It is described as very like Serolis, with the 
marked difference, that the thoracic rings are much more numerous, and the 
abdomen much smaller ; and it is said that its resemblance to Trilobites is 
unmistakable and very striking, and that it can be referred to no one of the 
orders or families in Milne Edwards’ or Dana’s classification. From the 
details of Prof. Agassiz's description, the animal is evidently one of the 
Serolidae, apparently congeneric, perhaps specifically identical, with the 
Brongniartia trilobitoides of Eights (Trans. Albany Institute, vol. ii., p. 53, 
pi. 1, 2, 1833), which is referred to the genus Serolis by Audouin and Milne 
Edwards (Archives du Museum d’Hist. nat., tome ii., p. 29, pi. 2, fig. 11, 
1839), and retained in the same genus by Milne Edwards in his great work 
(Hist. nat. des Crust., tome iii., p. 232, 1840). To make this apparent it is 
necessary to observe that what Prof. Agassiz calls the head includes the first 
thoracic segment, which in the Serolidae is anehylosed with the head ; that 
what he considers the three posterior segments of the thorax, have been 
regarded by carcinologists as belonging to the abdomen ; and that, as a 
result of this first homology, what have been regarded as the anterior legs 
are called maxillipeds. The only point in the whole description which can 
militate against the view here expressed is in the description of the nine 
pairs of legs which are said to be 11 all alike in structure ; ” the six anterior 
pairs, however, are “larger than the three last, which are also more 
approximated to each other,” thus agreeing perfectly in position with the 
three anterior abdominal legs of the ordinary Serolidae. The perfect agree- 
ment in all other respects, however, leaves little doubt of the close affinity 
between Tomocaris and the Brongniartia of Eights. It may be well to 
notice that among the species referred to Serolis, there are several genera, 
distinct from the typical S. paradox a, and that the species described by 
Eights represents one of these, although the name Brongniartia is preoccu- 
pied. — Silliman’s Journal, May. 
The Great Public Aquarium at Naples. — An account of this immense 
undertaking is given by a contemporary, and is of sufficient interest 
to have a place in our columns. The building, which is under the 
