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



the flagellum; tbe secondary appendage being half the length of the primary, the second 

 joint of the peduncle being about the same length as the first. Second pair of gnathopoda 

 having the propodos large ; palm without teeth, and defined by a small pointed process. 

 Posterior pair of pereiopoda having the posterior margin of the base smooth. 



" In its general appearance this species bears a near affinity to Moera grossimana, as well as to 

 M. tenella, from the Eeejee Islands, the only appreciable distinctions being in the shorter 

 length of the second joint of the antennse, the absence of teeth from the palm of the hand 

 in the second pair of gnathopoda, and in the even margin of the last (the only remaining) 

 pair of pereiopoda, and perhaps also in the shortness of the peduncle of the ultimate pair of 

 pleopoda." Habitat, a sponge in Esquimalt Harbour. 



Tanais loricatus, n. s., is also described in this paper. 



1864. Costa, Achille. 



Di due nuove specie di Crostacei Amfipodi del golfo di Napoli. Aunuario del 

 Museo zoologico della R. Universita di Napoli per Achille Costa. Anno II. 1862. 

 Napoli, 1864. pp. 153-157. 



He first describes "Ampelisca rubella, nob. Tav. II. fig. 7. A. saturate rosea; antennis 

 capite thomceqicp. parum longioribus, siibsequalihus ; scapo in siqxriorihus eix quartum, in 

 inferior ibus tertium totius anteyinx formante : pedibus prinii et securidi paris subcylindraceis, 

 longe pilosis (secundi gracilioribus paullumque longioribus), ungue arcuaio, infra de^itato ; 

 ferfii et quarti articido secundo et quarto brevissimis, ungue redo aactissimo ; quinti et sexti 

 articulo primo valde dilatato, orhiculari-cordato, ungue minutissimo retrum verso ; septimi 

 coeteris bremoribus, articulo primo 7ninus elato, inferius lobato-producto, articulis 2-5 

 brevibus siibaeqiialibus, ungue spurio, obtuso ; lamina caudali ovato-elliptica, postice profunde 

 scissa. — Long. miU. 7." He says that from Araneops diadema and Araneops longicmnis, 

 the two species of Ampjdisca which he had previously described from the Gulf of Naples, 

 the present species differs sensibly, in colour, smaller size and other more important 

 organic characters. He gives a fuller description in Italian. 



He next describes " Protomedeia fasciata, nob. Tav. II, fig. 8. P. cdbida, fasciis fuscis nigro 

 punctutis, antennis subxqualibus, scapo superiornm illo inferiorwn bremm-e; pedibus thoracici 

 quinti, sexti et septimi pans articulo p)rimo margine integro. — Long. milL 7-8." It has, he 

 says, great affinity with Protomedeia hirsutimana. Bate and Westwood, but differs in having 

 the first joint of the fifth pair of feet not serrate, in the distribution of the hairs (peluria) 

 of the feet of the second pair and in the antennse. It keeps its colour in alcohol 



1864. Costa, Achille. 



Di alcuni crostacei e di un distomideo parassito degli acalefi. Eendiconto della 

 R. Accademia delle Scienze Fisiche e Matematiche di Napoli. Fascicolo 4° — 

 Aprile 1864. 



Costa here notices that in 1850 Natale had placed Cocco's Orio omitJwramphus in a new genus, 

 as " Omithm-amphus Coccoi." With this Costa himself proposes to arrange three new 

 species in two new genera, forming a little natural group, the Oenitoramfini. The genus 

 Natalius is thus defined : — 



" Corpus elongatum, dorso rotundatmn. Caput antrorsum ad rostri instar conice productum, 

 rostro infra canaliculato. Antenns, duo, infra rostrum in canaliculo insertx, mimiix. 

 Oculi elongati, subreniformes. Palpi maxillares duo, corporis dimidiatn longitiidinem 



