122 



Bathyporeia, Platj^chnopus 



iiecessoiy flagellura, 1^* Joint much coarser than in B.pelagica, 2* little more than 

 ^'g as loDg. Anteuua 2 in Q little longer than anteuua 1, flagellum sborter than 

 ultimate and penultimate joints of peduncle combiued, 8-joiuted, lud" nearly as 

 long as the body. Gnathopod 1, H*^^ Joint oval, about as long as 5*'^ Peraeopod 3, 

 4^1' Joint considerably expauded, densely fringed, uiuch longer than the short 

 5*'i and 6*'* combined. Peraeopods 4 and 5 much shorter and coarser in structure 

 than in the otlier 4 species. üropod 3, 1^* Joint of outer ramus rather 

 expanded, 2^^ scarcely more than V4 Jis long. Lobes of telson comparatively 

 Short, each with 6 apical and 3 lateral spiues. L. about 5 mm. 



Baltic, Kattegat. Depth 4—75 m. 



B. lindströmi Stebb.*) 1893 B. pilosa (part.) (err., non Lindström 1855 !), 

 A. DellaVaUe in: F. Fl. Neapel, u 20 p. 752 t. 5 f. 1; t. 36 f. 19—32. 



General aspect robust. Side-plate 1 ending obtusely, 2^ with tooth at hinder 

 angle (front in text). Pleon segment 3, angles rounded, segnient 4 carrying a siugle 

 forward bending setule and a pair of spinules. Eyes oval, searlet. Antenna 1 in $ , 

 flagellum 5- er 6-jointed. Antenna 2 in $ , flagellum 10-jointed, nearly equal ultimate 

 and penultimate joints of peduncle combined. Gnathopod 1, 6tli Joint broadly oval, 

 much shorter than 5th. Peraeopods 2, 3 and 4 as in B. pelagica (p. 120), peraeopod 5 

 elongate as in B. gracilis (p. 121), but the finger said to be wanting. Uropod 3, outer 

 ramus, 2cl Joint about '/s length of Ist. Apices of telson said to be rounded. No apical spines 

 mentioned or figured. Body pellucid, colourless, or with a yellowish finge. Jj. 5 mm. 



Bay of Naples. Depth 10 — 20 ra, in sand. 



2. Gen. Platyischnopus Stebb. 



1888 Platyischnopus (Sp. un.: P. mirabilis), T. Stebbing in: Rep. Voy. Challengcr, 

 ij.29 p. 830 ! 1893 Platyschnopus, A. DellaValle in: F. Fl. Neapel, i;. 20 p.784. 



Head (Fig. 31) long, rostrate. 

 Side-plates 1—3 small, 4*^ quadrate. 

 Antenna 2 attached in front of eyes 

 to lower surfaco of head, 2^^ Joint 

 of peduncle longer than 1^* or 

 3*^, flagellum in Q few-jointed, 

 not louger than peduncle, accessory 

 flagellum half as long, 3-jointed. 

 Antenna 2 (Fig. 31) very little 

 longer than antenna 1, attached 

 behind the eyes, ultimate Joint of 

 peduncle shorter than penultimate, 

 Accessory lougcr thau thc 3-jointed flagellum. 

 flagellum Upper lip evenly rounded. Lower 

 lip without inner lobes. Mandible, 

 cutting edgc narrowly produced, 

 almost simple, accessory plate 

 perhaps wanting, no spiue-row, 

 molar prominent, denticulate, palp 

 with 3*^ Joint shorter than 2^, both 

 long and slender. Maxilla 1, 

 inner plate small, outer with 8 or 

 9 nearly simple spines, palp 1-jointed with 3 setae. Maxilla 2, outer plate 

 the broader. Maxillipeds, inner plates not large, outer narrow, with strong 



*) Spec. nov. After Gustaf Lindström. 



Flagellum 



Fig. 31. P. mirabilis. 

 Head and antennae. 



