ami Sp^rtM of Xtuiibranrhtate Molliuca. 133 



teotaclcs are represented by a fleshy, laterally extended veil. 

 The odontophore w narrow, bearing two bicuspid spines in 

 each transverse row ; no central spine, spinous collar, or 

 under jaw. 



This genus resembles Arnntho^loris and LamtUidorin^ espe- 

 cially the latt<^-r, in many characteristics of the buccal appa- 

 ratus, f, g. in the buccal gizzard, and in the narrow r>donto- 

 phore bearing but two well-develojM^d spines in each transverse 

 row, as well as in the somewhat similarlv shaj>ed oral veil in 

 place of labial tentacles; itss/^>ft j>allial papillaearealsosimilarto 

 those o( Acanthodoris: but it widely differs from lx>th the above, 

 and approaches the restricted genus Dort'ji, in the position of 

 the branchise in a pallial cavity, into which they are, at least 

 partially, rectractile. It must therefore Ije considered inter- 

 mediate. 



Calycidoris Gunthen, sp, nov. PI. VI. figs. 1, 1 a-1 ^. 



C. ovato-oblonga, subdeprej«a, lata ; pallio amplo, papillis namerosi*, 

 *longatis, conicis. mollibus, confertis tecto ; ttntaculis dorsalibus 

 brevibus retractilibus ; branchiis 1^2.3, arre-ct is, brevibus, latis, 

 lateraliter laminatis, confertira in calycem positis. anam vii procul 

 cingentibufl in cavitate pallii subretractiliba-s : velo capitis trian- 

 gulari, crasso, hujus basi lata ad pedem conjuncta ; pede trian- 

 gulari,lato, truncato antice, angusto rotundatoque postice ; lingua 

 angusta uncinLs duobus in quoque ordine transverso omata. 



The general shape of the body is a broad oval-oblong, 

 rather wider anteriorly, and moderately depressed. The mantle 

 is large, projecting over the head and laterally beyond the 

 foot ; the upper surface is covered with elongated, conical, 

 soft papillae, which are very numerous and crowded together 

 upon the sides, but are fewer in number and smaller in size upon 

 the back and upon the extreme edge. The dorsal tentacles, or 

 *'rhinophores," are short, apparently conical, minutely and dia- 

 gonally laminated, and retractile within cavities, the margins of 

 which are slightly raised and entire. The branchiae, eighteen 

 to twenty-three in number, form an elliptic cup with the long 

 axis transverse. They are upright, short, broad blades with 

 simple, lateral, overlapping laminae, are set radially, closely ap- 

 plied together, with their slightly tuberculated rcots extending 

 inwards and becoming united round the anus ; in this way 

 the branchiae appear to enclose a tuberculated space, as in 

 Lamellidoris. The simple anal opening is a little posterior to, 

 and to the left of, tb<? true centre. The margin of the cr»mmon 

 cavity, into which the branchiae can be partially withdrawn, 

 is slightly raised and fringed with long papillae. The oral 



Ann.&Maff. S. Him. Ser. 4. T^)/. xviii. 10 



