297 



Distribution. British Isles (Sp. Bate), coast of Bohuslan (Bruzelius). 

 Kattegat (Meinert), coast of France (Chevreux). 



6. Monoculodes tessellatus, Schneider. 



(PI. 106, fig. 1). 



Monoculodes tessellatus, Schneider, Trornso Museums Aarshefter VII, p. 81. 

 Syn: Monoculodes norvegicus, Schneider (olim.) 



Form of body resembling that in the preceding species, though being 

 perhaps a little more slender. Metasome scarcely carinated dorsally. Cepha- 

 lon not nearly attaining the length of the 3 anterior segments of mesosome 

 combined, frontal part somewhat less produced than in M. carinahis, but with 

 the rostrum comparatively larger, reaching to the end of the basal joint of the 

 superior antennae, upper contour of cephalon forming a perfectly even curve until 

 the tip of the rostrum. First pair of coxal plates but little expanded distally, 

 and nearly quadrangular in form ; 4th pair about as deep as the corresponding 

 segment, distal edge evenly curved, infero-posteal corners somewhat produced. 

 Eyes large, with the visual elements well developed, but of more rounded 

 form than in M. cariuatus, pigment bright red. Superior antennae in female 

 about the length of the cephalon and the 2 anterior segments of mesosome 

 combined, and reaching a little beyond the peduncle of the inferior ones, 1st 

 joint of the peduncle equalling in length the other 2 combined, flagellum 

 nearly as long as the peduncle, and composed of about 11 articulations. In- 

 ferior antennae scarcely more than 1 /s longer than the superior, last joint of 

 the peduncle shorter than the penultimate one, flagellum nearly as long as 

 the peduncle. Antennae in male modified in the usual manner, the inferior 

 ones about equalling in length the whole body. Anterior gnathopoda somewhat 

 less strong than in M. carinatus, propodos oval in form, with the palm more 

 distinctly defined below, and about the length of the hind margin, carpal lobe 

 rather short and broad, not nearly extending to the palm of the propodos. 

 Posterior gnathopoda less slender than in the said species, propodos compa- 

 ratively broader in proportion to its length, being scarcely more than 3 times 

 as long as it is broad, carpal process scarcely extending beyond the hind 

 margin of the propodos. Pereiopoda comparatively less robust, and not so 

 richly setous, dactylus rather elongated, equalling in length the propodal 

 joint, the latter in the 2 anterior pairs scarcely longer than the carpal joint. 

 Last pair of pereiopoda scarcely exceeding half the length of the body, carpal 

 joint much shorter than the propodal one, and not fully attaining the length of 

 the meral joint. Telson comparatively small, rounded, tip distinctly insinuated. 

 Body whitish, ornamented, on the back, with dark brownish patches rather regu- 



tt? Crustacea. 



