REPORT ON THE AMPHIPODA. 365 



1866. GrUBE, a. E. 



Beitriige zur Kenntniss der istrischeu Amphipoclenfauna. Arehiv fiir Natur- 

 geschichte. Zwei und dreissigster Jahrgang. Erster Band. Berlin. 18G6. pp. 

 377-417. Taf. ix. x. 



Grubo explains, to begin witb, tbat lie names the seven joints of the leg numerically according 

 to their position, except the seventh, -which for brevity he calls the finger (die Klaue). On 

 the first joint his remark is that he reckons " das Basalstiick, an welchem die Kieme und 

 das zum Tragen der Eier bestimmte borstenrandige Blatt befestigt ist, und das zwar von der 

 Epimeralplatto aussen iiberwachsen aber doch von dieser unterscheidbar ist, als Ites Glied 

 oder Hiiftglietl." He defines the Amphipoda genuina, the Gammarina, and the two families, 

 OrchestidK and Gammaridae. 



After discussing " Orchestia littorea" and " Orchestia Montagui, Aud.," Taf. ix. fig. 1, with 

 some of their synonyms, Gruhe gives a definition of Allorcliestes, Dana, including " Telson 

 simplex vel bipartitum." To this genus he assigns 1. " Orchestia Perieri, Lucas," Taf. ix. 

 fig. 2 ; 2. anew species, " AllorcheMes HcUeri," Taf. ix. fig. 3, which he had previously classed 

 as "Allorcliestes imlricatus, Spence Bate? juv.," but which is probably Hyale nilsonii, 

 Rathke ; and 3. a new species, Allorcliestes stylifer, Taf. ix. fig. 4, " carpo . . satis lato, 

 postice in processum styliformem curvatum exeunte," a peculiarity which, with some other 

 slighter distinctions, separates it, he says, from Amphitlwe {Allorcliestes) prevosti, Milne- 

 Edwards. He then gives a definition of Nicea, Nicolet, including " Telson profunde 

 divisum," and, depending apparently only on comparative lengths of the antennse for the 

 generic distinction, he assigns his Awpldthoe (Hyale) istrica to this genus as Nicea istrica 

 (? , Taf. ix. fig. 5. He describes a new species, Nicea longicornis, from a single female 

 specimen, 4 mm. in length, having " antennse superiores inferioribus paulo longiores et 

 fortiores, usque ad segmentum 5tum pertinentes, articulis 14, 2'''' longitudine 1"°', dupla 3"." 

 It reminds him of Callioije, but for the last uropods, while Gammarella and Crangonyx are 

 excluded on other accounts. The character of the antennse at any rate seems little to accord 

 with Nicea (Hyale), and, as no figure is given, it might be rash to suggest Pherusa fucicola, 

 Leach, for this species, on the presumption of some error in Grube's description. 



In defining the genus Lysianassa, Grube gives " Telson squamiforme integrum vel fissum," and 

 in it describes, 1. Lysianassa spinicornis, A. Costa, Taf. ix. fig. 6 ; 2. ? Lysianassa loricafa, 

 A. Costa ; 3. his own Lysianassa ciliafa, Taf. ix. fig. 7, which has the " telson oblongum 

 longitudine appendicum pedes bistyli 3", usque ultra medium fissum," and is thereby 

 excluded from the genus Lysianassa as generally defined, and from identity with Lysianassa 

 aiidouiniana, Sp. Bate, as proposed by Heller ; 4. Lysianassa humilis, A. Costa, which in 

 Heller's opinion is probably the same as Lysianassa costx, M.-Edw.; 5. Lysianassa longi- 

 cornis, Lucas, Taf. ix. fig. 8, with remarks on the differences between the two sexes, extending 

 not only to the size and shape and armature of the antennse, but also to the form of the 

 first gnathopods and of the telson. " Das Telson, dessen Form als charakteristiech fur die 

 Species gilt, war hier hei Miinnchen und Weibchen verschieden gestaltet, bei beiden zwar 

 langlich, oben etwas verschmiilert mit geraden Seitenrandern, aber bei jenen ganzriindig und 

 abgerundet bei diesen hingegen liinger und scharf und tief eingesclinitten, daher zweispitzig, 

 jede Spitze mit einem Stachelchen besetzt" Though he had specimens with eggs %vell 

 advanced in development, Grube states that he had sought in vain for the marsupial plates. 

 On the whole I incline to infer that, while assuming to describe the female of Lysianassa 

 longicornis, Lucas, he has had before him not onl}' a distinct species, but the species of a 

 distinct genus, probably Iclinopus taurus, A. Costa. He figures and describes (seemingly 



