MOLU'SCA, I. SMITH. s:; 



II. Sigapatella calyptrceformis (Lamarck). 



Trochus calyptrseforniis, Lamarck, Anim. san* Vert.. MI! \ II. p. IJ, no. 7 (1>L''_'). 

 Culi/ 1 it i' u'ti liiniari'ki, licshaycs. F.nrycl. Method., Ycrx. \ul. II. ji. \~(\ (is.'iii). 

 t'l-i-jililiilii tmni'iitin'ii, <JM.IV .-mil < iaini.'iril, Vuv. " Astrolabe," /mil., vol. Ill, p. 1 1'.', 

 jil. LXXII, n>. 1 5(1835). 



Trui-liitii i ii/i/ji tr if/a i- ////> : l!cc\i-. Coiii-li. l< ..... .. \ol. -XI. li'_'. I I (septum t ..... lei-ply an-iiat> 



t'nli/jilr.fi calyptraefonma : Pi-itchard ami (latlill'. I'roi-. I!. Sni-. N'ic-luria. Mil. XII. |i. I'.l'.l 



(1900); ilcdlex. Proc. Linn. So,-. N.S.W.. vol. XXXVIII. p. 288 i l'.U:i). 



Station l:',4. near North Cape. Nev, /calami: 1 l-i'O fathoms. 



This spfcifs. \vliidi aNii occurs on llic coast of New South Wales and South 

 Australia, although 'jivally rcsciulilino- >'. notue-zelandice, is. as dcscrilicd hv l!cc\c. 

 " rather more spirally convoluted." 'Mher dill'ercnccs are the lai'ui'i' penultimate whorl. 

 t he spire nearer t lie cent re. and the umbilicus less marked and not so near the >idc. The 

 periostraca are not quite the same, and although the interior i.f the shell is usually 

 tinted with a purplish flesh-colour, it is not marked with dark purplish In-own or 

 purple, like ih>r,r--,'l<ni<li<t'. The septum is usual Iv of a more or less lilac tint, whereas 

 iu Lesson's species it is white. The largest specimen is :',() mm. in diameter. 



li'. Sigapatella tennis (liray). IM. I. ti-'s. i'0-i'i'. 



ilit tiintix, (Iray. Prm-. Xool. Soc-., lMi7. ji. T-'i-'i. 



tenuis: Hutton. (.'at. .Marine Moll. ^.'/... j.. .".l 1 I 1S7:>). 

 Troclti'tii *,ntin,i: Hutton. .Jouni. dc Conch., vol. XXVI. p. :\n i |s7s>. 



< 'illicit nun Ki-iitum : Hutton, Index Fauna- X.Z., p. 7'J (Hint): Sutcr, Man. X.Z. Moll.. 

 ]i. L'S4, pi. XLIV, tig. 4 (l'.ll:5). 



i t?iiin: Hcdley. Pror. Linn. Soc. X.S.W., vol. XXXVIII, p. L'S'.l (I'.H.S). 



Station 1M4. near North ('ape. New Zealand : 11-20 fathoms. 



This spi'cies has hern cousidei'cd the same as Calyptrcea (Siyajtatella) scutum of 

 Lesson.* hut it seems very doiilitt'ul whether that supposition is correct. Then- are 

 several features mentioned in Lessons description which are not observable in the she'll 

 liefore us. In the first place the sixe inven by Lesson (11 lines = i'7 mm.) is ne\er 

 reached liv S. tennis. It is described as " a tours de la spin- pins marques et plus 

 0-rainls " than in Siyapatella novce-zelandice. As a matter ot lad the whorls are 

 Iracealile with much more difficulty in tfiniix. The epidermis is said to be "blond 

 dore, the eolumella " eourte. un pen dilatre a sa hase. the sepiiim " echancree en 



devallt. and the limbillCUS " presc|lie nul." 



Now iii >. tenuis the periostraeiim is so thin that it is generally worn off. the 

 eolumella is hardly dilated at the hase. the septum is curved, not notched, in front. 

 and there certainly is DO trace .,)' an nmhilical chink. Lesson twice refers to the 

 l>< nrlii interim-. Inn this is a character which does not occur in the Calyptrceidte, &nd 



Voy. " CoquiUe," Zool., vol. II. pi. I. p. ."-'.i:. (18 10). 



