52 PYCNOGONIDA. 



The chelifori rather long, slender, the scape distinctly two-jointed, the fingers rather long, slender, 



somewhat gaping, without teeth. 

 The palps short, unjointed, tapering. 



The ovigerous legs short, without claw; the terminal point without dermal leaves. 

 The ambulatory legs long, four times the total length, rather slender, the first tibial joint partly, the 



second one in the whole length provided with two series of long natatory bristles. The claw 



not very long, rather slender, with short, very slender auxiliary claws. 

 Total length 29". The proboscis 9 mm . The trunk 13""". The caudal segment 7". 



Occurrence. The Ingolf-station 47, in the north-eastern Atlantic, 61 32' L,at N. 13 40' Long. W. 

 depth 950 fath. The bottom gray clay with Globigerina shells and a temperature of 323- One 

 single female. 



For elucidating the genus Pallenopsis, and the species of Kroyer Pall, fluminensis that has 

 been much discxissed, I shall here, relying on the original specimen of the museum, give some par- 

 ticulars, starting with a new diagnosis of the species. 



Pallenopsis fluminensis Kr. 

 PL V. Fig. 1-6. 



Phoxichilidium fluminense Krayer, Kundsk. Pycnog., 1844, pp. 104 and 124. Tab. I. Fig. i, a-f. 



Hoek, Report Pycnog. Challenger, 1881, p. 81. PL XIV. Fig. 1-4. 

 Pallene fluminensis Semper, Pycnog. Larvenf., 1874, p. 282. 



B0hm, Pycnog. Berl., 1879, p. 180. Tab. I. Fig. 4, 4 a-f. 

 Pallenopsis fluminensis Wilson, Report Pycnog. Blake, 1882, p. 250. 



Schimkewitsch, Pantop. Vettor Pisani, 1890, p. 14 (339). Fig. 24-31. 



Corpus sat robustum, glabrum. 



Collum perbreve. 



Rostrum breviusculum, crassiusculum, in medio vix constrictum. 



Tiiber oculare sat alttim, erectum, subconicum, ad apicem paulum attenuatum; ocelli perparvi, rotundi. 



Segmentum caudale crassiusculum, minus productum, in obliquum erectum. 



Chelifori breviusculi, sat robusti, scapo subsolido, segerrime partito; digiti perbreves, crassi, vix hiantes. 



Palpi perbreves, solidi, obtusi. 



Pedes oviferi breves, absque ungue. 



Pedes gressorii breviusculi, crassiusculi ; ductus glandarius in articulo quarto maris brevis. Unguis sat 



brevis atque robustus, unguiculis auxiliariis sat robustis, dimidiam longitudinem unguis paulum 



excedentibus. 

 Long, tota 7,i mm . Rostri 1,7""". Corporis 4,3"" n . Segmenti caudalis 2 mm . 



