MOLLUSCA, I. SMITH. si 



Watson. is preserved in :i box bv ilsdl'. and is distinct. It e\idenil\ \v,-is nor seen 

 by Mr. lledlev. 



'/'. riftiifii attains nindi larger dimensions than those "hen liy llntton or Snter. 

 The latter quotes a specimen from Channel Island. ,V_! mm. IOHL; : Imr a shell 

 presented m the British .Museum in ISJO by the l!e\. I!. Taylor ha- a length of 

 85 nun., and the last whorl is 11) mm. in diameter at the periphery. 



s. Crepidula monoxylo, (Lesson). 



<'tilii/itr:i' (<'i-i/i'i!iiln) iiiniin.i-ii/ii. Lesson, Voy. '' Coipiille," p. .'!'.)! (IS.'iO). 



r,,,,;,?,,/,, ,,,,///<,.- TYyon, Ma,,. C,,nrli.. vol. VIII. p. Us, pi. XXXVII. ii-s. :ir>. :;i;, after 



Quoy and Gaimard : Harris, Cat. Tertiary Mull. Australasia, p. l.'|ii (1S'.)7). 

 ('i-i'liiiliiln i-nnliirlii. < ^iiov and Gaiinard, Vnv. " Astrolabe," Zool., Mil. I II. p. IIS, pi. LXXII, 



tigs. I-'), 10 (1S3.-))! 



Crypto, prof unda, Hutton, Cat. Tertiary Moll. N.Z., p. 14 (1ST.'!). 

 Creptiliil/i rri'iiiiliiln, Hutton (mm Linn.), Index Fauna X.X., p. 7'J : Sntcr. Man. N.X. Moll., 



P . 286, pi. XLIV, ii-. 5, :>.\ (1904). 

 CrepiduJa (lanm-us) iniyiiifuriuix, Harris (nun Lamarck), up. cit. p. J4S. 



Station 134, near Xm-th Cape. Xe\v Xealand : 1 l-l'O fathoms. From months of 

 shells inhabited liy Hermit Cralis. 



Although this species has a very close resemhlance to the Mediterranean 

 C. i-ri'/ii/luln. there is one feature, at least, liy which these two (onus may lie 

 distino-uishecl. Deshaycs* lias pointed out that in (_'. n-<'f>i<//t/<i the shells present a 

 notch at the right extremity of the internal septum where it joins the wall of the 

 shell. This is not met with in C. monoxyla. The septum is described l>y Lesson 

 " reetiligne a son liord lilire," ami (,)noy and Uainiard eharacterise it as " lisse et droite. 



I have exaniine<l a large series of the New Zealand shell, and have not found a 

 trace of a notch. 



The shells are very variable in form, according to the object to which they are 

 attached. When the surface is Hat or convex the Civpiilulu assumes an arched 

 form, but when resting on a concave surface, such as the interior of Gastropod shells, 

 then it becomes almost flat. It may be noticed that in convex specimens the septum 

 is almost flat or even concave, whereas in flat examples it becomes arched or convex. 



9. Crepidula <-<ixf<tt<i, Sowerby. 



mxtata, Sowurliy, Genera "ec. and fuss, shells, part 23, pi. 1 ">!-', li-,'. .'> (IS:.' I) ; Suter, 

 Man. N.X. Moll., p. 287, pi. XLIV, li-s. li, HA; l,uoy and Gaim.-ml. Voy. "Astrolabe," 

 Zool, vol. Ill, p. 41 I, pi. LXXII. li-s. 10-1J. 



1'ri-jiiiliiln i-iixliittt, 1'esliayes. Kncyflop. Mi'tliod., N'eT's. \ol. II. part -. p.- 1 ' (IS.'ill); ill.. Aniin. 

 sans Vert., ed. _', \,",I. VII. 'p. C,14. 



On beach. Spirits I'ay. near North Cape. New Zealand. 



* Aniin. sans N'ert., ed. -. \ol. \' I I . p. 644, t'o >t note. 



