right Generic Names of some Amphipoda. 193 



the female. In the same year, 1887, H. J. Hansen described 

 his Prinassus Nordenskioldii, n. gen., n. sp., without giving 

 any separate generic definition. His single specimen was a 

 female, in which the upper antennae were rather longer than 

 the lower, and had no accessory flagellum. There is every 

 probability that his species is the same as Norman's HeUeria 

 coalita, and there can be no doubt that his genus is identical 

 with that defined by Norman and Chevreux. Whether 

 Guernea or Prinassus should have the priority is not so easy 

 to decide. Chevreux's paper comes to hand as an " Extrait 

 du Bulletin de la Societe Zoologique de France, t. xii. 1887," 

 and is dated on the cover as published in Paris, 1887. 

 Hansen's paper similarly comes to hand as a " Saertryk af 

 Vidensk. Meddel. fra den naturh. Foren. i Kjobh. 1887/' 

 and is dated on the titlepage as published in Kjobenhavn, 

 1887. Extracts from the ' Annals and Magazine ' have the 

 great advantage of showing the exact month in which the 

 description of a new genus or species has appeared, but in the 

 extracts above-mentioned there is nothing to indicate which 

 has the priority. It would be a decided boon if, in all publi- 

 cations of the kind, this inconvenience could be remedied. In 

 papers extracted from the reports, for instance, of our own 

 British Association, there is in general nothing which de- 

 cidedly shows whether they were published during the year 

 in which they were read, or not till the following year. In 

 the case of the Transactions of a Society for any given year, 

 the presumption will be that they were not actually published 

 till the year following, although in some instances parts of 

 these Transactions may have been in fact issued while the 

 year to which they refer was still current. It would save 

 much trouble if " separate copies " were provided with an 

 exact reference to the volume and paging of the work from 

 which the excerpt is made, as well as with the true date, not 

 of the reading, or not of that alone, but of the first actual 

 publishing of the paper concerned. 



It may be of interest to English readers to know that the 

 genus Eriopis, Bruzelius, which Boeck identified with Niphar- 

 gus, Schiodte, was reinstated in 1888 by the eminent Polish 

 writer, Wrzesniowski, who found that the maxillas were dis- 

 tinct in the two genera. It appears, however, from Scudder's 

 * Nomenclator Zoologicus,' that Eriopis was preoccupied be- 

 fore its use by Bruzelius, and therefore, as Opis was altered 

 into Opisa, I propose to change Eriopis, Bruzelius, into Eri- 

 opisa. 



Dr. P. P. C. Hoek, recently appointed Director of the new 

 Zoological Station at Helder, last year explained that his 



