190 Proboloides, Metopidarum species dubia, Cressidae 



large. Maxillipeds, inner plates distinctly sepai^ate and outer altogether wanting. 

 Gnathopod 1 sraall but rather strong, 5*^^ Joint broadly and stoutly oval, 

 6*^ shorter and mucli narrower, widening distally to a ti'ansverse palm, wMch 

 is slightly overlapped by the finger. Gnathopod 2 large, 2^ Joint rather 

 Short but unusually broad, 6*^ longer than 2*^, oblong, palm defined by a 

 slender outstanding tooth, within which it is crenulate, then forming a denticle 

 and a lai'ger tooth over which the sti'ong finger curves. Peraeopods 1 — 5 

 agreeing with the generic character. üropod 3, peduncle shorter than the 

 2-jointed ramus. Telson long oval, without spines. Colour whitish-yellow. 

 L. 7—8 mm. 



Arctic Ocean and North- Atlantic (Spitzbergen, Greenland, Iceland). 



7. P. groenlandicus (H. J. Hansen) 1887 Metopa groenlandica, H. J. Hansen 

 in: Vid. Meddel., ser. 4 v.9 p. 94 t. B f. 7— 7e|1893 M. g., A. DellaValle in: F.Fl. 

 Neapel, r. 20 p. ö40 t. 59 f. 55. 



Very near to P. glacialis (p. 189), but side-plates deeper, 4*^ larger than 

 2^ and 3^ combined, Antenna 1 in d. 2<^ Joint longer than l^S a little shorter 

 than flagellum. Mouth-organs not described. Gnathopod 2, 2*^ Joint not 

 unusually wide, 6*^ with a deep and broad sinus in the palm between the 

 defining process and a smaller tooth forming a subobtuse angle with the 

 seiTate portion near the hinge of the finger. Gnathopod 2 in Q , 6*^ Joint 

 oval, a convex sen-ate palm sloping to a small tooth. Peraeopod 5, 2^ Joint 

 much dilated, 4**^ little. L. d 8-4, 9 7-5 mm. 



Arctic Ocean and North-Atlantic (Greenland). 



P. sarsii (Pfeff.) 1888 Metopas., Pfeffer in: Jahrb. Hamburg. Anst., r. 5 p. 84 

 t. 2 f. 3, 8; t. 3 f. 2 i 1893 M. s., A. DellaValle in: F. Fl. Neapel, v. 20 p. 645. 



L. 3 mm. 



South-Atlantic (South Georgia). Low tide. 



Metopidarum species dubia. 



Metopa normani Hoek 1 889 M. n., Hoek in : Tijdschr. Nederl. dierk. Ver., 

 ser. 2 r. 2 p. 190 t. 7 f. 5, 5'. 



Said to be near to Metopella longimaua (p. 185), but being nearer to Metopoides 

 parallelocheir (p. 186). L. 48 mm. 



North-Sea (Dutch coast). Depth 24 m. 



10. Farn. Cressidae 



1899 Cressidae, T. Stebbing in: Ann. nat. Hist., ser. 7 v. 4 p. 210. 



Side-plate 1 rudimentary, 2^ to 4**^ large but normal in shape. Upper 

 lip bilobed. Lower lip with inner lobes coalesced. Mandible, cutting edge 

 dentate, molar weak, palp elongate, 3*^ Joint long. Maxilla 1, palp 1-jointed. 

 Maxiila 2, inner plate very small. Maxillipeds, inner plates separate, outer 

 small but distinct. Gnathopod 1 simple. Gnathopod .2 subchelate. Peraeo- 

 pods 3 — 5, 2* Joint expanded. üropods 1 and 2, rami very unequal. Uropod 3 

 with a Single 2-jointed ramus. Telson coalesced with pleon segment 6. 



Marine. 



1 genus, 3 species. 



