c 



^S s. fso'iT» : 



"All tlu^ îi1k)V(* siK^cies are clostily nslated. Mr. Sladen also described 

 a siiifîlo yonii^ s|MK*imeii, taken off Delaware Bay l)y the Challenger, as u 

 variet}' (f)(x-kh")itaUs) of 7>. srmlsqvomritvs. The type of the latter Avas from 

 off fTa]>an. 



"This snpiK)sed variety appears to m(^ to agree in all respects with 

 many yonng s|)ecimens of onr B. sjmwsjis, jndging from Mr. Sladen's detailed 

 description. The two species are evidently very closely allied." 



Some fuither remarks on this species are made by VEititiLE as follows 



['99, p. 217] : 



" This si)ecies was taken noiih of Cape Hatteras, at 62 stations, between 



N. Lit. 42-' 47' and 35^ 10', in 721 to 2021 fathoms, l)y the U. S. Fish 



Conmiission. Most common in 1200 to IGOO fathoms. 



" It A\as also takcai in the Gulf of Mexico, station 2380 and station 2381, 



in 1430 and 1330 fathoms, and oil' Jamaica, station 2127, 1639 fathoms." 



TiiTiWKi in his recent revision of the Notomijoin [:10, p. 464] looks npon 



li. sjn)io.svs, I',, (irmafm and 7A .scmmpiamahis as distinct species. Further, 



he regards />. (iniiafm as identical with Avchnster simplex Peüriei; (= B. 



Himplcr). According to him B. spinosus and B. mmpÀex occur in the /Atlantic, 



and />. ficmiffqiinmatKfi iu the Indian Ocean and the West Pacific. He says 



[:10, p. 464], '' rdiarrhostcr armcdvfi Sladex 1889 fehlt in dieser List« imd 



' in der folgenden Bestimmmigsüibelle, weil ich den früher aufgestellten Ai'vli- 



y^ aster simpJcx FEiiitiEi: 1881 für die Jugendform der von Sladex als 



' Pararchastcr armahis bezeichneten Art halte." Again a little fm-ther t)n 



[p. 46(5] he says, " jNlit A'eüiüll stimme ich darin überein, dass Sladens 



scmisqvnmatm var. occidentalis identisch ist mit VEitr.iLLS sjjiuosvs. Dagegen 



.scheint mir (innotvs St.vdkx in Gegensatz zu YeiîIîills Ansicht nicht mit 



spinos}/.s vereinigt ',wc;rd(;n zu könncai ; annattix muss aber seinen Namen 



zugunst<'n von Feküieüs slmptlcx^^ einbüssen, da simplex der ältere Name für 



1) I'euuieu's full description of A. simplfx nins as follows ['8i, p, 204] : 

 .. No. 40.— Profondeur, 1,323 brasses.— T.ixt. N.. 23' 26'.— Long. O., 84^ 02' (1 exemplaire). 

 " Point de i)lnques ventrales entre les i)laques marginales A-entniles et les pièces dentaires. — 

 Une ])laqne marginale impaire dans l'angle des bras supijortant les pièces dentaires qui sont 

 arrondies au sommet. — Quatorze plaques margiiuiles plus longues que larges, légèrement convexes 

 sur le Ixjrd externe, de manière à faire paraître le bord des bras un i>eu festonné. Ces plaques 

 supiiortent directement les platpus ambulacraires qiù sont plus jietites, iK)lygonales, saillantes 



