REPORT ON THE AMPHIPODA. 231 



1849. NiCOLET, HeKCULE. 



Historia fisica y politica cle Chile segun documentos adquiridos en esta republica 

 durante doce anos de residencia en ella y publicada bajo los auspicios del supremo 

 gobierno por Claudio Gray ciudadano chileno. Zoologia. Tomo tercero. Paris, 



MDCCCXLtX. 



The Crustacea occupy pages 115 to 318 of this third volume. In the first division, " Crustaceos 

 maxilados," the " Anfipodos " and " LoemodipoJos " are respectively the third and fourth, 

 orders. The Amphipods, pages 226 to 249, include the two .subdivisions, " Gamarianos " 

 and "Hiperineas." In the former, Talitrus diilensis, n. s., is established on a damaged 

 specimen with the definition, " T. ant(?nnis hreoihus; pedibus anteriorihus f/ra-ciliJinx; 

 corpore supra levi, cuI latera rugoso." A new genus follows, thus described : — 



" Orquestoidea. — Orchestoidea. AntennsR superiores miniinx, inferiores [inferioribus] multo 

 hreviores; artieulo primo lata, quadrifurmi, fortiter depresso ; secundo gracili, cylindrico ; 

 terfio secundo breviori, gracili, ojlindraceo, tigilla brevisdma, quinque articuJata terminato. 

 Antennx inferiores maximx, crassissirnx ; artieulo ultimo pedunculi elongato ; penultimo 

 ultimo crassiori, leviter breviori. Oculi magni. Palpus pedum maxillarum externarum, 

 cjuadriarticulatus, parum elongatus, crassus ; articrdo jjrimo brevissimo ; tertio qucul riformi, 

 apice truncato, in medio fortiter emarginato, quartoqiie angusto brevi, iurbinato. Mandilmlx 

 robustee, fortiter dentatx, palpo nullo. Pedes j^rimiparis iarsa styliformi terminati ; secundi 

 parts subcJiil iformes manu maxima cra^^sissima, ovata ; sequenfes unguicidafi." 



The fuller description concludes with the observation, " los apendices de los anillos abdominales 

 son cortos y bifidos ; el ultimo segmento es muy corto y repentinamente replegado por bajo, 

 lo que da ilia estremidad posterior del cuerpo un aspecto truncado," to which he appends the 

 remark by way of note, " la forma de las antennas y la del cuerpo de estos Crustaceos 

 representan a los Talitros, mientras que la disposicion de sus patas del segundo par los 

 in corpora i, las Orquescias : pero las pata-quijadas esternas y sobre todo la forma de los taUos 

 palpiformes los separau completamente, siendo iutermediarios de ambos generos, con quienes 

 tienen muchas relaciones." The type species, Orchestoidea tiiberculafa, pi. 2, fig. 4, is 

 defined as " 0. flaveseens; corpore tuberculato ; artieulo primo pedunctdi antennarum 

 externarum extus bituberculato ; fronte in msdio levitei- angulato ; pedibus villosis." Nothing 

 is said about the female. 



He then describes Orchestia chilensis, M.-Edw.; Orchestia brevicoruis, n. s. ; " Orchestia Gayi,'' 

 n. s.; Amphitoe chilensis, n. s., pi. 2, fig. 5 ; " Amphitoe Gayi," n. s., pi. 2, fig. 6. 



The new genus Nicea is thus defined : — " Antennse superiores exteris breviores. Caput crassum. 

 Oculi ovati, oblique disq)ositi. Pedes breves, primi et secundi paris subcMl iformes ; manihus 

 brevissimis. Mandibulx brevissimse, bilobatse, multidentictdatx, non palpigerse. Labium 

 sternale maximum." To the general description lie adds that he has formed this genus upon 

 a specimen which has various affinities with Anipliithoe, but differs in the absence of the 

 mandibular palp and the relative length of the antennae, bringing it near to Talitrus, and 

 above all by the considerable development of the buccal portion and the form of the 

 maxiUipeds ; its dilated (rechoncho) body resembles that of Talitrus. The type species, 

 " Nicea Lucasii," pi. 2, fig. 7, is defined " N. obscure fuseo-virescens ; corpore brevi, cras.w, 

 curvato, conve.w; pedibus maxillaribus exto^nis fortiter fuberculatis." 



He next gives Gammarus chilensis, n. s. 



This is followed by what Nicolet supposed to be a new genus, Lalaria, thus defined : — 



" Antennx superiores graciles, elongati, artieulo secundo pedunculi jirirno longiore, cylindrico, 

 tertio hrevi, bifigellato. Antennx inferiores pedunculo elongatissimo, tigella brenissima. 



