SCHIZOPODS, VOCALLY SKIZOPODS 257 



Dunedin, New Zealand, has informed me by letter that 

 among specimens which he collected in Tasmania during 

 January, 1892, 'one is especially interesting, a freshwater 

 Schizopod from the very summit of Mount Wellington, 

 that is, from a height of 4,000 feet, and that this crus- 

 tacean is quite unique, and will require a new family all 

 to itself.' Writing again, he tells me that the animal has 

 110 carapace, but is divided like an amphipod, so that he 

 has named the genus Anaspis, which means ' without a 

 shield.' From the available information, therefore, it is not 

 difficult to predict that the number of Schizopod families 

 will in the near future be augmented from four to six. 



Family 1. Lophogastridce. 



The carapace is rather large, more or less calcareous, 

 loosely covering more or less of the trunk, the segments 

 of which are well defined dorsally. The first rnaxillipeds 

 are robust, with exopod imperfectly developed or wanting, 

 the epipod very large and projecting within the branchial 

 cavity. The second maxillipeds have the terminal joint 

 obtuse. The six following pairs of appendages are uniform 

 and ambulatory, with well-marked finger. The branchiee 

 are arthrobranchias, very complex, arborescent, consisting 

 of three or four principal branches, the innermost largest 

 and freely projecting beneath the trunk, and of others 

 covered by the carapace ; the hindmost pair are rudi- 

 mentary or wanting. The marsupium or maternal pouch 

 consists of seven pairs of plates. The pleopods are well 

 developed in both sexes, uniform, natatory. The develop- 

 ment is without any free metamorphosis. 



G. 0. Sars, from whose exceedingly valuable report on 

 the Challenger Schizopods this definition is adapted, allots 

 four genera to this family. 



Lophogaster, Michael Sars, 1856, still possesses but a 

 single species, Lophogaster typictus, M. Sars, which at 

 present is only known from the North Atlantic and the 

 South Atlantic, without having been discovered in inter- 

 mediate positions. It is recorded by Canon Norman from 

 the Shetland Isles. Its sculptured carapace has a short 



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