a 



125 



straight. It is indistinctly beaked : the tip being rounded off as a rule. It overlaps the tergum 

 only very slightly. 



The tergum (fig. 11 B) has an irregular triangular shape. It is divided by a ridge 

 running from the apex to the basal-scutal angle into two parts: a larger triangular part and 

 smaller one of an irregular shape. The latter part is to a small extent overlapped by the 

 scutum. Its free margin (the scutal margin) is bowed in the upper half and slightly hollowed 

 out in the lower half. 



The carina (fig. 11 C) has about the same size as the tergum, its shape is triangular 

 and it is bowed in a lateral as well as in a vertical direction: the inner surface is concave in 

 consequence. The upper free portion has a very slight central ridge. The inner growing portion 

 is indistinctly pentagonal. 



Scutum, tergum and carina have numerous and very distinctly projecting rims on which 

 numerous and very small teeth are visible. 



The rostrum is small and is composed of only two or three zones of growth. The 

 number of subjacent scales of the peduncle, which the rostrum equals in width, is three, in 

 one specimen four. 



The 1 a t u s is also small. It has the shape of a parallelogram and shows only 3 or 4 

 zones of growth. Along its base there are at most four scales of the peduncle. 



The peduncle shows a distinctly swollen ring covered by about six horizontal rows 

 of scales immediately beneath the capitulum. The first, second and third row have the scales 

 of an irregular transversely elongated shape, the inferior margin being crenated. The scales of 

 the three following rows are much smaller (PI. IX, fig. i 2). A few rows of much smaller scales 

 of an irregularly rounded form are seen under this swollen ring and then follows the main part 

 of the peduncle which shows no scales on the surface and is indistinctly ringed. The width of 

 the peduncle diminishes considerably from the capitulum downwards. 



The size of the largest specimen was: length 46 mm., 34 mm. being accounted by for 

 the peduncle; greatest breadth of the capitulum at its base: 13 mm., smallest breadth: 7 mm. 

 Most specimens are, however, considerably smaller. 



The body of the animal differs from that of L. nicobarica in the following regards : 



The 1 a b r u m has about twelve small blunt teeth on its central and about 1 5 on each 

 of the lateral parts. Palpi short conical, with the tips rounded. 



The mandibles have less numerous pectinations between the first and the second, as 

 also between the second and third teeth, viz. : 1 2 and 7 to 8 respectively. 



The maxillae have a notch, two spines are inserted above it, half a dozen delicate 

 ones in the notch and numerous pairs of spines beneath it. The inferior angle can hardly be 

 said to be prominent. 



The outer maxillae have the spines continuous over the inner and outer margin. 



The cirri correspond in general with those of L. nicobarica, but the number of segments 

 is not inconsiderably smaller : 



The left cirrus of the first pair has 9 and 1 1 segments in the slightly unequal rami ; 

 the cirrus of the right side has 1 1 and 1 2 segments in the same specimen. 



125 



