Crustacean Fauna of South Africa. 275 
LAETMATOPHILUS TRIDENS 0. sp. 
(Plate XXVIII. Fig. 22.) 
6. The single specimen is somewhat incomplete, but is well 
enough preserved to show the essential characters. 
Peraeon segment 1 with 2 transverse ridges and a depression 
between them, segments 2—4 each with 1 very small medio-dorsal 
tubercle. 
First antenna as in DL. purus. Second antenna lost. 
First gnathopod similar to that of L. purus, but 6th joint without 
the row of serrate spines leading to palmar angle, finger very thick, 
outer margin very convex, 10 closely-set spine-teeth at distal end of 
inner margin. 
Second gnathopod, anterior margin of 2nd joint with 2 keels, one 
acute and the other subacute apically, 6th joint of the same shape as 
that of L. purus, but palm concave in basal half, distal half bearing 
3 teeth, the first acutely triangular, the second obtusely cylindrical, 
the third largest, broad, denticulate, finger equal to palm, stout, nearly 
even in width throughout, palm well furnished with plumose setae. 
Third to fifth peraeopods, 2nd joint with hind margin spinose, not 
keeled or produced. 
Uropods and telson as in L. purus. 
Length: 5 mm. 
Colour: In spirit, pale pinkish. 
Locality: Seal Island SW. 3 S., distant 3 mile (False Bay). 
ii Siathoms, leg sss Pieter HKaure’ 12/11/02" ((S7AIMe No: 
A2779.) 
This species is unique in having 3 teeth on the palm of the 2nd 
enathopod, all the other species of the genus having only 2. 
LAETMATOPHILUS DURBANENSIS 0. sp. 
Very similar to DZ. purus. Peraeon transversely rugulose though 
not very distinctly ; wider in ° than dg, being nearly circular in the 
former. 
First gnathopod quite distinct from that of Z. pwrus in that the 6th 
joint is not at all widened, is narrower than 5th joint and shows no 
differentiation of hind margin and palm, the inferior margin bearing a 
few feebly plumose setae; the finger is quite smooth, but bears a 
short, stout spine on the inner apex at the base of the unguis. Similar 
in both sexes. 
Second gnathopod g, 2nd joint with 2 keels on anterior margin, 
both apically acute, 4th apically subacute, 6th ovate but shorter and 
