EEPORT ON THE AMPHIPODA. 299 



lower antennse, from which Costa derived the name, and, as he thought, the most strikino- 

 peculiarity, of this genus, is rarely absent from the Gammarina. Spence Bate made the 

 genus a synonym of Melita, Leach, Grube referred it to Megamoera, Spence Bate, and 

 Heller to Blxia, Leach. The type species Garadocus mxhestiipes, Tav. iv. fig. 4, becomes 

 Mxra orcliestiipes. 

 In the genus Lew-otlwc, Leach, Costa describes Leurothov (lentimlatu, A. Costa, with a reference 

 to " Fn. Nap. Tav. ix., fig. 3. (senza testo)," and the remark that it is " diversa dalla 

 L. Jurina per le proporzioni degli articoli delle antenae, e pel margine unguicolare dell 

 mani del secondo pajo fornito di dentelli piii fini e tutti eguali." It has been identified with 

 Leucotlwe spinicavpa, Abildgiiard, from which Lmcotlioi- furina, Savigny, is only separated 

 by subtle distinctions. Costa points out that his Leucotho'd partlienopxa, in Hope's 

 Catalogue, needs confirmation. 

 A fresh definition is given of Uricthonius, Milne-Edwards, in which genus Costa describes, 

 1. Ericthonius diffmmis, MQne-Edwards, Mas, and 2. Eridlimius Udens, A. Costa, 

 Tav. iv. fig. 9, which J. V. Carus names Cerapus hidens, while Boeck makes it a synonym 

 of Cei-apus ahditus, Templeton. S. I. Smith having shown that Cerajmts is distinguished 

 from Ericthonius by having the second uropods uniramous, the species assigned to either of 

 these genera without description of the pleon are left in confusion. The peculiar form of 

 the second gnathopods in the male seems to be common to both genera. 

 After mentioning Podocerus calcaratus, Eathke, Costa defines the genus Microdeutopus as 



follows : — 

 " Antennse superiores seta multi articulata terminatx ; setaque accessoria rudimentali prseditx ; 

 inferiores pediformes. Pedes qiiatuor anterioresprehensiles ; primiparis inajores, in sexuhus 

 difformes, (mas) carpo maximu, manu parva, unguiculum gerente ; (fern.) manu maj ore fere 

 ut in g. Ariip)hitlioe: secundi minuti, filiformes." The type species is Mierodeut(ypus 

 gr>illotalpa, A. Costa, Tav. iv. fig. 10. 

 Corophium aclierusicum, A. Costa, is not figured, but thus described: — "■ Antennis superioribus 

 hreviorihiis et graeiliorihus ; inferiorihus corporis fere longitvdine, validissimis, pedunculi 

 articulo tertio infra ad apicem spinis duabus vel tribus decrescentibus armato (mas) ; 

 brevioribus, minus crassis, inermibus (fern.); pedibus secundi paris ungue infra bidentato. — 

 Long. lin. 2." Boeck and Carus doubtfully identify this with Corophium crassicorne, Bruz. 

 In the " Amnpodi anomali," Costa gives Vibilia speciosa, A. Costa, and a reference to Fn. Nap. 

 tav. ix. fig. 1 (senza testo). Carus gives as doubtful synonyms of " Vibilia Jeangerardi," 

 Lucas, both this species and Vibilia mediterranea, Glaus. 

 Hijperia pupa, A. Costa, Tav. iv. fig. 11, is thus described : — "Pedibus quarti paris illos tertii 

 paido superantihus, quinti paris caster is distincte longioribus ; sexti et septimi decrescentibus : 

 jiedibus spuriis abdominalibus quintis quartis brevioribus, sextis pedunculo hrevissimo, 

 appendicibus valde inxqualibus, interna majori laminam apicalem paulo superaiite, externa 

 augusta quarto breviore. — Long. lin. 3i." Unfortunately only a gnathopod and part of the 

 pleon are figured, but there is enough to show that this species does not belong to Hyperia, 

 but more likely to a genus of the Lycieidai. 

 Costa further mentions Phrosina semilunata, Eisso, Plinmiina sedentaria, Forsk., and Typhis 

 ovoides, Eisso. 



1857. Huxley, Thomas Henry, bom 1825 (Hageu). 



Medical Times and Gazette. Vol. XXXVI. p. 467. 1857. 



Bate and Westwood, vol. i. p. xvi, say that Professor Huxley here gives the name of Endo- 

 pliragmal arch to the long processes in the head of TalUrus, by which the stomach is 

 supported in its position. 



