LEPIDO] ]:; 



entialed areas. Middle valves With fifaorl but higb lUtUIttl pl 



IK insertion plate- ; sinus larj-e :IIH| deep ; tin- divi-i-.n of tl, 

 mid lateral areas is marked in>ide l.\ :( .-.liirlit ._. . 



margin .r the anterior valve i< semicircular, MM- posterior mai 



meeting ;il MII angle <'f l.'.n '. The po.-terior margin of the 

 vnlvc is about tin- third of a circle, itfi In. nt 111:11 

 above a- a >traight line. The miicro is >nl.eenl ral, .-omewhat D 

 t'orxvard than lichind. 



Tlit' color ot'tlic valves is a pale irray-liniwn. irre-jularK 

 witli brown dots which are lacking at the margins, l'-a\; 

 a paler, unicoh.i-ed /(.no. The girdle is brownish, the scales white. 

 The length cannot be given exactly, as all the >pecinien- \\ ! 

 strongly rolled up; but the maximum length seemed to l.e 1-7, 

 breadth of the shell 2';") of the girdle O8 mill. (/;/fr.). 



Leptochiton pagenstecheri PFFR., Jahrb. Hamburg. \Vi.--en- 

 schat't lichen AnstaJten, iii Jahrgang, p. 107, t. 3, f. 3, 1 - 



L. ASELLU8 Spongier. PI. 3, figs. 64, 65, 66. 



Shell small, rather elevated, the dorsal ridge bluntly angular. 

 Very minutely and evenly, but rather indistinctly, lirate-granulate; 

 olive-ashen, often having longitudinal delicate pencilings of olive- 

 green. 



Anterior valve very densely, minutely and evenly granulated, 

 the granules being irregularly, but usually visibly, arranged in radi- 

 ating rows ; the peripheral third of the valve having coarse concen- 

 tric wrinkles. 



Intermediate valves have the central areas finely densely longi- 

 tudinally granose-lirate. Lateral areas closely granose, the granules 

 arranged in radiating rows on the lower portions, which are also 

 wrinkled like the anterior and posterior valves. The lateral areas 

 are separated from the central area by an inconspicuous low ridge. 



Posterior valve with subcentral, rather low umbo, the posterior 

 slope concave. Interior of valves white; sutural plates small. 



Lofoten Is., Norway, Iceland and Greenland, *out/i to d'u/j f 

 Gascony. 



Chiton asellus SIM:N<;I.I:R, Skriv. Nat. Solsk. 17 ( .7, vol. iv. j.. 

 LOWE, Zool. Journ. ii, p. 101, t. 5, f. 3, 4, 1825. BROWN: 

 DESHAYES in LAMARCK An. s. Vert. ; MII>IH-:NI><>I:I i : FORBEB <$ 

 1 1. \\LEY, Brit. Moll. vol. ii, p. 407, t. f>!>, f. 1, '_'. Chiton tiiiniinn.< 

 ( 'IIKMNIT/; WOOD; DILI.WYN. Chiton cinereu* MONTAGU; 



