’s RIJKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN. 259 



of walking legs (at least in the case of the penultimate pair) more 
than twice as long as broad. 6 
Anterior margin of front nearly straight in dorsal view, width of 
front between eye-stalks */, of the distance between external orbital 
angles; surface of carapace smooth and shining, without hairs, finely 
punctate; side margins much divergent posteriorly in their anterior 
half. Superior border of arm of cheliped with rectangular, subdistal 
tooth; upper border of movable finger with two thick, cone-shaped 
teeth (especially developed in the ¢'). Meropodites of walking legs 
(at least in the case of the penultimate pair) exactly twice as long as 
broad; carpo- and propodite thickly hairy. 
Sarm. punctatum (A. Milne-Edwards). 
Lateral margins of external orbital angles subparallel to each 
other, only slightly diverging posteriorly, separated from the next 
tooth by a narrow incision; lateral margins of epibranchial teeth 
convergent posteriorly and shorter than those of outer orbital angles ; 
no trace of a second (posterior) epibranchial tooth; postfrontal lobes 
very unequal, the inner more than twice as broad as the outer ones. 
Sarm. birdti Nobili. 
Lateral margins of external orbital angles strongly divergent 
posteriorly, separated from the next tooth by a very deep incision ; 
lateral margins of epibranchial teeth subparallel to each other, some- 
what convex and distinctly longer than those of external orbital 
angles; a second (posterior) epibranchial tooth indicated; median post- 
frontal lobes only 1'/, times as broad as the outer ones. 
Sarm. fryattt Tesch. 
D. Clistocoeloma. 
Distance between external orbital angles distinctly more than 
length of carapace in the median line; external postfrontal lobes not 
subdivided by a short longitudinal groove. Last segment of abdomen 
of © much longer than broad at the base, twice as long as the 
preceding segment. Cl. merguiense de Man. 
Distance between external orbital angles about equal to length of 
carapace in the median line; external postfrontal lobes subdivided 
anteriorly by a very short longitudinal groove into two tubercles. 2 
Superior orbital border convex in its inner part. 5th segment of 
abdomen of o longer than 6th (penultimate) segment; terminal seg- 
