s RIJKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN. 21 
are very much sloping downward. Looked at from above, the lateral 
margins of the carapace are much narrowed anteriorly and the greatest 
breadth is found between the posterior epibranchial teeth, further distally 
the margins are distinctly concave, bulging out again in their distal third 
part and ending above the bases of the penultimate pair of legs. The 
external orbital angles are acute, directed forward and inward; the 
distance between them is distinctly greater than the length of the cara- 
pace in the median line; the lateral margins are much diverging distally 
and are separated off from the epibranchial teeth by a deep and wide 
1 
Fig. 6. Sarmatium fryatti n. sp. {. Nat. size. 
incision; the latter teeth are somewhat projecting forward, there is no 
oblique crest, ending at the tip of the tooth, unlike Sarm. punctatum; 
the lateral margins are slightly convex, and feebly diverging distally, 
they are longer than those of the external orbital angles, and are 
defined posteriorly by a trace of a second epibranchial tooth, forming 
the lateral end of the anterior oblique line on the branchial regions; this 
line is followed by 4—5 similar ones. Greatest breadth of the carapace, 
in proportion to the length of the latter, 1.3:1 in the present species, 
1.24:1 in Sarm. birdi. Posterior margin of carapace equal to width of 
front between the eye-stalks. The front is vertically deflexed, but owing 
to the fact that the protogastric regions are very much sloping and the 
postfrontal lobes much rounded-off, it is scarcely defined towards tne 
carapace; the anterior margin is not at all curved upward, and has a 
