344 PEECY SLADEN TEUST EXPEDITION. 



24. Lejndasthenia maculata, sp. n. (Plate 20. fig. 33; Plate 21. fig. 51.) 



Meastu'ements. The worm is complete, but the last part is regenerated. Length 

 36 mm., breadth with sette 5 mm. ; no. of segments 93 ; 31 pairs of elytra. 



Body elongated and slender, tlie annuli of segments very close together, and para- 

 podia narrow. 



Head same shape as in L. elegans from Wasin, but tentacles more slender and with 

 finely drawn out tips. Palps lost. Eyes situated as in L. elegans, anterior jmir not 

 pushed so far laterally, very large, especially anterior pair. Behind the head distinct 

 nuchal flap developed. 



Elytra circular, proportionately larger than other examples of this genus here 

 described ; tiny dark spot in centre of each corresponding to pigment fleck situated 

 inwards to this on dorsum ; surface finely veined, with irregular masses of light 

 pigment on veins, giving a curious granular appearance to elytra under low power lens. 



Dorsal cirri like tentacles, slenderer than in L. elegans, and in the anterior part of 

 body longer ; those of first three segments longer than sacceeding ones. 



Notopodium not represented by any kind of projection, the position only marked 

 by aciculum (fig. 33). Prominent neuropodium, setae all rather slender, possessing 

 typical bifurcate apex. Most dorsal in bundle one or two very fine sette, dilTering 

 from rest in great length of their serrated portions. In other ventral setae of anterior 

 segments spinose portions inclined at an angle to shaft (fig. 51) ; those of posterior 

 segments of greater thickness and with shorter apex. 



Locality. A single specimen from Prison Island, Zanzibar ; from coral, collected by 

 Mr. C. Crossland. 



25. Lepidasthenia minikoensis, sp. n. 



Measurements. Length 51 mm., breadth 5 mm. with setae, 2 mm. without ; no. of 

 segments 61 ; no. of pairs of elytra 26. 



Head like that of L. elegans, tentacles lost. 



Elytra just covering parapodia, with smooth border and granular appearance due to 

 concentration of masses of light pigment (cp. L. maculata). 



Dorsal cirri long, extending as far as tip of ventral setae, gradually tapering to 

 filiform tip (witliout bulbous enlargement as in L. maculata). Notopodium only 

 represented by aciculum. Neuropodium has setae with short spiniferous region ; 

 " spines" better described as foliaceous striated laraellas (same type both in L. macvlata. 

 and L. microlepis). Apex of seta sharp and a little curved : in some a sharp spur just 

 underneath apex, making tip almost bidentate. 



Locality. Minikoi ; in tube with Iphione muricata. 



This worm is rather doubtfully referred to a new species. It has some points in 

 common Mith L. maculata, notably the character of the elytra and of the ventral sette. 

 In general appearance, however, there is great dissimilarity, L. maculata having 

 close-set segments and narrow parapodia, and the present species comparatively wide 

 segments. In the arrangement of the ventral setae there is also a contrast, for the 

 slender setae found uppermost in the dorsal bundle of L. maculata are not here 

 represented. 



