334 PERCY SLADEN TEUST EXPEDITLON. 



tubercles. At margins of patches form of component spines is clearly discernible and 

 spinelets clustering round their base. Small ty]je of elytral tubercle (PL 18. fig. 7 a) of 

 tubular form with spinelets at svimmit; large type spherical in shape, with development 

 of small spines over entire surface (fig. 7 c). Sets resemble those of L. cristatus ; ventral 

 setae without spur under apex. No modification of ventral setae of second segment. 

 Locality. Salomon; one female full of eggs. 



Lepidonotus cristatus, var. echinata, var. n. (Plate 18. figs. 4, 5.) 



Measurements. Length 19 mm., breadth with setse 8 mm. 



Median and lateral tentacles of equal length, palps slightly longer, as in Z. cristatus. 

 Two pairs of equal eyes and nuchal collar with two lateral papillae. Elytron (fig. 4) 

 withoiit crest, but with two chitinous ornaments, large, oval in shape, and with a fringe 

 of conical papillae fused by their bases. Smaller tubercles (fig. 5 a) of tubular shape 

 with as many as twelve attached spinelets. Anterior border carries numerous large 

 conical spines (fig. 5 c) with spinelets confined to a narrow basal zone. Intermediate 

 forms (fig. 5 b) show spherical base beset with spinelets and terminal spine of small 

 size. Ventral setae without spur under apex, but roughnesses between apex and spinous 

 row indicate incipient serration. No modification of setae of second segment. 



Locality. Mauritius, A 2, 100 fathoms, with Palmyra sjilendens, 



9. Lepidonotus purpureas, sp. n. (Plate 18. fig. 3.) 



Measurements. 21 mm. long, 7'5 mm. broad; another specimen, 14 mm. long, 5 mm. 

 broad. 



Characteristic ajipearance due to purple-brown elytra, their colour only relieved by 

 a white spot over the area of attachment. Head of characteristic Lepidonotus type, 

 rather small, bearing indistinct eyes. Palps three times as long as the lateral tentacles, 

 and latter about half the length of median. Conspicuous nuchal collar. Dorsal cirri 

 long, purple-brown in colour, relieved by bands of white. Uniform in diameter, but 

 with terminal slight bulbous enlargement followed by a slender filiform tip. Elytra 

 with regular oval shape (recalling those of Gastrolepidia amblyphyllus in colour and 

 general appearance). Borders smooth, and surface appears so to the naked eye, but 

 magnification shows surface to be strewn with little chitinous tubercles, most 

 numerous round the border, showing slight median depression. Pigment concentrated 

 into little masses, and between which are often small aggregations of clearly defined 

 cells without pigment, resulting in a kind of honeycomb structure (fig. 3). One kind of 

 dorsal seta of usual spinose type ending in a slender tip free from spines. Ventral 

 setae stout structures, with a large number of spinous rows and with a spur under apex. 



Locality. Zanzibar ; two specimens collected by Mr. Crossland. 



10. Lepidonotus carinatus, sp. n. (Plate 18. fig. 1.) 

 Measurements. Length 185 mm., breadth with setae 6 mm. 



Body of generally yellow colour with brown median band. Anterior end rather 

 pointed, posterior broad. Head with two pairs of eyes ; posterior pair placed very far 



