20 



formigt udskaaret Rodled er forbundet mod Skaftet, er 

 næsten overall jevn tyk og bestaar af circa 2Q korte, med 

 tætte Knipper af gjennemsigtige, baandformige Sandsebørster 

 de saakaldte cilia auditoria) besatte Led. Den indre Svøbe 

 er betydelig tyndere, afsmalnende mod Enden og sammen- 

 sat af et lignende Antal. men med simple Borster besatte 

 Led. Hos Hannerne er begge Svøber længere og navnlig 

 den ydre (Fig. 5) betydelig stærkere udviklet og bestaaende 

 ai' flere Led. 



2det Par Følere, der næsten er fæstede i samme 

 horizontale Plan som Iste Par. bestaar (se Fig. lii af en 

 kort og tyk, utydelig segmenteret Eoddel. fra hvis Ende 

 udgaar oventil og udåd et bladformigt Vedhæng, nedentil 

 og indad en tynd, mangeleddet Svøbe, Roddelen gaar paa 

 den ydre Side ud i en stærk tornformig. fortilrettet Fort- 

 sats og viser ved Basis paa den indre Side en spids Torn, 

 der synes at svare til Lugteknuden hos Brachyurerne og 

 den saakaldte spina olfadoria hos Amphipodeme. 



Det bladdannede Vedhæng (ibid.) er af en meget bred, 

 oval eller elliptisk Form og neppe mere end dobbelt saa 

 langt som bredt. Dets ydre Kant er næsten lige, eller kun 

 ganske svagt buet og glat samt ender fortil med et stærkt 

 tandformigt Fremspring. Den indre Kaut er jevnt bue- 

 formigt hoiet og ligesom den bredt afrundede Ende af 

 Bladet forsynet med en tæt Kad af korte Fjærbørster. 

 Den ovre Flade viser 3 divergerende Kjoler, hvoraf den 

 ydre lober i nogen Afstand fra Randen lige fortil mod det 

 omtalte tandformige Fremspring, medens de 2 øvrige pas- 

 serer i diagonal Retning over Bladet og taber sig henimod 

 dettes børstebesatte Rand. 



Svoben bestaar af et cylindriskt Skaft omtrent af 

 Bladets Lamgde og en traadformig Endedel. Skaftet ise 

 Fig. 6) er snmmensat af 3 Led. hvoraf de 2 første er 

 ganske korte og skjævt forbundne med hinanden. medens 

 sidste Led er af anselig Længde. regelmæssigt cylindriskt 

 og ved Enden borstebesat. Den traadformige Endedel (se 

 Fig. 1 og 2) er omtrent af Legemets halve Længde og 

 sammensat af talrige korte Led 



M middelene er idethele temmelig svagt udviklede og 

 viser dim lor Orangonideme characteristiske Bygning. 



Overlæben (Fig. 7) danner en temmelig voluminøs 

 lialvkugleformig Freinstaaenhed. der delvis dækker Mund- 

 aabningen fortil. 



Underhelien (Fig. 8i ,.r af en særdeles tynd. mem- 

 branøs Beskaffenhed og derfor vanskelig at faa helt ud- 

 præpareret. Den gaar ud i to meget stærkt divergerende 

 Lapper, der ender med en noget indadkrummet Spids, men 

 forøvrigt ganske synes at mangle enhver Ciliering i Kanterne. 



Kindbakkerne (Fig. 9), der som hos alle egentlige 

 Orangonider magler Palpe, er forholdsvis smaa og svage. 



sbort and tbick. almost bowl-shaped basal articulation, is 

 of nearly uniform tbickness throughout, and consists of about 

 20 short joints, beset witb closely disposed fascicles of 

 translucent, riband-sbaped sensory bristles (the so-called 

 cilia auditoria). The inner flagellum is much more slender. 

 tapering towards the extremity. and composed of a like 

 number of articulations, beset however with simple bristles. 

 In the males, both flagella are longer, and, in particular the 

 outer one (fig. 5), much more developed aud composed of 

 a greater number of articulations. 



The 2nd pair of antennæ, attached almost iu the same 

 horizontal plane as the Ist pair, consist (see fig. 6) of a 

 short and tbick. indistinctly segmented basal portion, from 

 the extremity of which, upward and outward. proceeds a 

 squamiform appendage, downward and inward a slender multi- 

 articulate flagellum. The basal portion is produced on the 

 outer side into a stout, spiniform, anteriorly directed process. 

 and exhibits at the base. on the inner side. au acute spine, 

 corresponding apparently to the olfactory tubercle in the 

 Brachyura and the so-called spina olfadoria in the Am- 

 phipoda. 



The squamiform appendage i ibid.) is exceedingly broad, 

 oval or elliptic in form. and very little more tban twice 

 as long as broad. Its outer margin is almost straight, or 

 very slightly curved. and smooth. terminating anteriorly in 

 a stout. deiitiform projection. The inner margin is uni- 

 forinly arcuate. and. in common witb the broadly rounded 

 extremity of the scale, furnished witb a closely set series 

 of short. plumose bristles. The upper surface exhibits o 

 diverging carinæ, the outer of which extends. at some dis- 

 tance from the margin, straight forward towards the pre- 

 viously mentioned dentiform projection, whereas the 2 others 

 pass diagonally across the scale. and disappear in immediate 

 proximity to the bristly margin of the latter. 



The flagellum consists of a cylindric peduncle, about of 

 the same length as that of the scale, and of a tiliforni 

 terminal portion. The peduncle (see fig. G) is composed 

 of o segments, the 2 first quite short and obliquely con- 

 nected with each other. whereas the last segment is of 

 considerable length. of a. regular cylindrical form. and at the 

 extremity beset witli bristles. The filifonn terminal portion 

 (see figs 1, 2) about equals half the body in length. and is 

 composed of numerous short articulations. 



The buccal parts are on the whole but slightly de- 

 veloped, and exhibit the structure characteristic of the 

 Crangonidm. 



The la brum (fig. 7) constitutes a comparatively volu- 

 minous semiglobular prominence, partially covering the buccal 

 orifice in front. 



The labiuni (fig. 8) has an exceedingly thin, niem- 

 branaceous structure: and hence can with great difficulty 

 be separated in a complete state. It protends as two ex- 

 ceedingly diverging lobules. terminating in a somewhat in- 

 wardlv curved point, but for the rest would appear to be 

 entirely without any eiliated covering at the edges. 



The mandibles (fig. 9), which. as in all true Cran- 

 </<m/<lii'. are without any palps, are comparatively small and 



