386 THE VOYAGE OF H.M.S. CHALLENGER. 



as agreeing witli tliose found by Torell off the coast of Greenland, in having four simple 

 eyes. " The niimher of eyes, therefore, would not seem to he constant." Compare Kote on 

 Goes, 1865. 



A new genus, Tes^arops, is thus defined : — " Eyes four — two (large, compound) situated above the 

 origin of the sujjerior antennae, and two (nearly simple) below the others, at the base of the 

 superior antennae. Superior antennae furnished with a very slender secondary appendage. 

 Both pairs of gnathopods simple, not subchelate. Last pereiopods short, stout. Pleon 

 having dorsal margins of segments toothed. Telson squamiform. Last uropods two- 

 branched." To the description of the species Tessarops hastata are prefixed as possible 

 synonyms, 1 Tiron acaiithurus, Lilljeborg, 1865, and ? Syrrhoe liicuspis, Goes, 1865. 

 Boeck has decided that the three species named are iu fact but one, and that Tiron 

 acanthurus has priority. 



A new species, " Mcera Batei" is described and figured. Attention is called to the difference in size 

 and structure of the second gnathopod in the two sexes of this genus. Megamcei-a othonis 

 is assigned as female to Mcgamcera lonyimana, Megamcera alderi as female to Melita ohiusata, 

 to which Melita proxima is united " as another and the more usual form of the male." 



The genus Mcgamai-a, Bate, is thought to be in effect not distinct from Meera. 



The new genus Helleria is thus defined : — " Eyes compound. Superior antennre slender, much 

 shorter than inferior, with[out] secondary appendage. Both gnathopods subchelate. Last 

 pereiopods rather short, furnished with long plumose setae. Fifth and sixth segments of 

 pleon coalesced into one. Last urojjods two-branched. Telson squamiform, cleft almost to 

 the base." The new species is named Helleria coalita. But the name Helleria must be 

 changed, beiug preoccupied among Isopoda. 



1868. Norman, A. M. 



Preliminary Report on the Crustacea, Molluscoida, Echinodermata, and Coelen- 

 terata, procured by the Shetland Dredging Committee in 1867. Eeport of the 

 Thirty-seventli Meeting of the British Association for the Advancement of Science ; 

 held at Dundee in September 1867. London, 1868. pp. 437-441. 



" As a rule," Mr. Norman observes, " those Amphipods which occur also on the British coast 

 attain a much greater development within the Arctic circle." He notices, without naming, 

 new species of Afglus, Cyrtoplmim, GoropMum, Pleudes?, and one "allied apparently to 

 Callioj'iiis," with "a new genus allied in general characters of eyes, of gnathopods, and 

 pereiopods, especially in the broadly flattened meros and carpus of the last pair, to 

 Haploops, but having the antenna furnished with an appendage." 



1868. Plateau, Fi;Lix. 



Recherches sur les Crustaces d'eau douce de Belgique. 1^ Partie. Genres 

 Gammarus, Linceus et Cyims. Memoires Couronnes Acad. Eoy. de Belgique, 

 XXXIV. 1868. 1 PI. 



The Annals and Magazine of Natural History, Ser. 4, Vol. iii. p. 12. 



" Gammarus puteanus (Koch) is not blind, but sensible to light." (Zool Eecord, 1870.) 



