320 



ments, pigment bright red, with, a chalky white coating. Superior antennae in 

 female about the length of the cephalon and the first 4 segments of mesosome 

 combined, joints of the peduncle successively diminishing in size, flagellum 

 about the length of the peduncle, and composed of 7 articulations. Inferior 

 antennae in female much shorter than the superior, flagellum about the length 

 of tlie pe'duncle. Anterior gnathopoda very powerful, propodos much expanded, 

 oval triangular in form, palm considerably arched and divided into 7 — 8 

 coarse denticles, carpal pi'ocess about as in S. hrevicarpum. Posterior gnatho- 

 poda extremely slender, and nearly naked, propodos much elongated, and con- 

 siderably narrowed in its outer part, chela very minute, scarcely occupying 

 more than ^h of the lengtli of the propodos. The 2 anterior pairs of pereio- 

 poda with the propodal joint shorter than the carpal one, dactylus very small ; 

 the 2 succeeding pairs about as in S. hrevicarprim. Last pair of pereiopoda 

 with the carpal and propodal joints about of equal length. Telson rather 

 small, roundescarcely longerd, than it is broad, tip very slightly insinuated. 

 Body pellucid, whitish, without any trace of pigmentary ornament; ova in 

 the marsupial pouch orange-coloured. Length of adult female 4 mm. 



Remarl'f. — There cannot be any doubt about the identity of the above- 

 described form with that named by Boeck as Fontocrates haplocheles ; but 

 whether the form observed by Grube is in reality referable to this species or 

 to either of the 2 other forms here described, seems to be somewhat questionable. 

 Boeck himself would seem to have confounded the 2 above -described species, 

 since he erroneously qiiotes the Kroycra hnmcarpa of Sp. Bate as a synonym 

 to his Poiitocrates haphcheltv. The present form, is however, easily distinguish- 

 able from the former by the strongly- deflexed rostrum, the more powerful 

 anterior gnathopoda, and the much more slender posterior ones, moreover by 

 the absolute want of any pigmentar}^ ornament on the body. 



Occurrence. — This form would seem to be miich less common than S. 

 hrevicarpum. I have only found it quite solitary in a few places off the west 

 coast of Norway, and recently also in the Trondhjemsfjord. It seems to be 

 a true deep-water form, being only met with in- depths ranging from oO to 

 300 fathoms. 



Disiribxtion. — Adriatic ((Trube), Kattegat (Meinert), coast of France 

 (Chevreux). 



22. Synchelidium intermedium, G. 0. Sars, n. sp. 



(PI. 113, fifj. 1). 



In outward appearance, rather resembling S. haphchcJcs. Cephalon, how- 

 ever, much less strongly vaulted in front, rostrum but sligktly deflexed. 



