NAUTILI 



'at specie* of Nautilus. 



PI. :>'.>, lig. .'HM; U an ideal \ie\\ of 1 he ;mini:i! of Naut iln-. with 

 the tentacles expanded. 

 . The three lr>l known Aperies of tlir genil-> \mttfl 



pllius, .V. nnirrninj,/,,//,'* : niil A'. ;/////////r/////x. Tin- lir-t 

 species is the most coiniiioii and li:is the wide-l ran _ : the -second 

 -pecio :- nioiv limited iii its range ;ui<l rarer: the third, although 

 found in collect ion-, is -career than the two preceding. and ha- 

 a range peculiar to it-ell'. Tin? range of \. Pom f>il t n.< einhr.-iee- 

 the isl:nnls of the K:i>tTii ArchipclM^-o, I-]rroiii:inmi. Aneitiini, 

 illld other ishin.ls of the New ! lehrido :inl :il>o the Keejee uToiij). 

 A'. iiiii'Tinn/1/Kiliin is round altont the Isle of Pine> :iinl New 

 ('Mledoni.-i : ;in<l t he rnre A". H inltilirntnx in the Solomon A rchi- 

 pehiu-o. New (ieor^in. New IJritain. New Irel.-ind. and prol:illv 

 to the e:ist ward of these Croups o|' islands. Dr. Macdonald, ol' 

 II. M. S. Ht-riil,!. int'onns me that on e\amin;ition and compari- 

 son. there is a marked diilerence between the tentacula in the 

 lir>t two spi-t.-irs. The sculpturing on A', n nil>il iml u.< is very dis- 

 tinctly marked on tin- external surface of the shell, differently 

 from what is ol>erved cither in \. Pum/ii/iii* or N. macrom />//((- 

 ///x. ami forming one of its very distinctive characters. The 

 outer edge of the lip of the perfect shell in .V. umbilicatus has a 

 narrow, black rim, continuous from the anterior portion of the 

 whorl. In A'. Pom/iiHu.* and A', macromphalus, the black rim is 

 on the inner side of the edge of the lip. The color of the shells 

 in the ditferent species varies from brick-red and orange of 

 brighter or paler tints, to nearly a dark crimson color, bein- afl 

 various :t s the colors observed in the common cowrie slu-lls." 



N. POMIMLM s. Linn. PI. D'.i. tigs. :)OT, 508. 



Shell sub-orbicular, smooth, imperforate, the umbilicus being 

 covered by a callous deposit. White, llamed t rans\ ersely with rel. 



Polynesia. 



During the voya-e of the Chii/fr,,,/, r. a living A". / > f*//////////s 

 was dredged in .'ii'll fathoms, oil' Matuka I>land. I-'iji group. It 

 \\a- very lively, -wimming around in a tub. in a retrograde 

 direction by the ejection of water from tin- funnel. The tenta- 



U.-mu-tt. rr"f. '/."'. >'"''., -"-''. ' 



