268 PROCEEDINGS OF THE ACADEMY OF [^l^ay, 



of Ihe body. In shape the foot is easily distinguished from that of 

 Lagisca rarutpina by the much smaller notopodium. The neuro- 

 podium is broad, with a prominent aeicular lobe, from the end of 

 which, above the projecting aciculum, is produced a long, slender, 

 tentacle-like process, quite as long as the lobe itself. The noto- 

 podial aeicular lobe beai-s no such process, and is much shorter. 

 The doi-sal cirri resemble the tentacular cirri, except for the longer 

 filiform tips and longer, more numerous and clavate cilia. Ven- 

 tral cirri slender, reaching nearly to the end of the neuropodial 

 aeicular lobe and bearing a few very short, nearly globoid cilia. 



Only the anterior elytra are present, and these have the normal 

 arrangement as far as the tenth pair on somite XIX. The first is 

 circular, five or six succeeding pairs (PI. XIV, fig. 29) reniform, 

 and the others ovate-reniform. They are thin, membranous, 

 translucent and fairly adherent. The area of attachment is small, 

 elliptical and very mucli nearer to the anterior and external borders 

 than to the posterior and internal, A rather wide and clearly defined 

 area internal to the hilum and along the anterior border is en- 

 tirely free from spines. Anteriorly and internally the spines are 

 low and nipple-shaped, but over most of the surface are sharply 

 conical, becoming elevated and acute in certain regions, notably i.i 

 a broad irregular band which passes across the middle of the scale 

 in its long direction. Enlarged spines are also scattered singly or 

 in groups here and there over the surface toward the posterior and 

 external borders. Twelve or fifteen prominent soft papilla (PI. 

 XIV, fig. 31) of various heights and with rounded summits appear 

 just in advance of the posterior margin, and a few similar ones on 

 other parts of the surface. Marginal cilia appear to be absent, but 

 a few large ones are scattered over the surface in the external third. 

 On the first scale soft papillse extend more than half-way aroimd 

 the margin, and an area of particularly strong spines occurs above 

 the area of attachment. 



The neuropodial setae (PI. XIV, figs. 32-34) are long and slen- 

 der, with very long and but slightly enlarged spinous regions. The 

 smooth tips are very short; the principal point rather strongly 

 curved, but not hooked; the accessory process far out, running first 

 parallel to the principal point and then diverging from it, very 

 slender, sharp-pointed and long. These setae are very fragile and 

 but few are found with the tips intact. The spines are long and 



