and l^m^tes of NudihraiicMate Molluscn. 133 



tentacles are represented by a fleshy, laterally extended veil. 

 The odontophore is narrow, bearing two bicuspid spines in 

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

 under jaw. 



This genus resembles Acanthodoris and Lamellidoris, espe- 

 cially tlie latter, in many characteristics of the buccal appa- 

 ratus, e. g. in the buccal gizzard, and in the narrow odonto- 

 phore bearing but two well-developed spines in each transverse 

 I'ow, as well as in the somewhat similarly shaped oral veil in 

 place of labial tentacles; its soft pallial papillae are also similar to 

 those oi Acanthodoris: but it widely differs from both the above, 

 and approaches the restricted genus Doris^ in the position of 

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

 partially, rectractile. It must therefore be considered inter- 

 mediate. 



Calycidoris Guntheri, sp. nov. PI. VL figs. 1, 1 a-1 c. 



C ovato-oblonga, subdepressa, lata ; pallio amplo, papillis numerosis, 

 elongatis, eonicis, mollibus, confertis tecto ; tentaciilis dorsalibu8 

 brevibus retractilibus ; branchiis 18-23, arrectis, brevibus, latis, 

 lateraliter laminatis, confertim in calycem positis, anum vix procul 

 cingentibus in cavitate pallii subretractilibus ; velo capitis trian- 

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

 gulari, lato, truneato autice, angusto rotundatoque postice ; lingua 

 angusta uncinis duobus in quoqii-e ordine transverso ornata. 



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 papillge, 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 laminge, are set radially, closely ap- 

 plied together, with their slightly tuberculated roots extending 

 inwards and becoming united round the anus ; in this way 

 the branchiae appear to enclose a tuberculated space, as in 

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

 and to the left of, the true centre. The margin of the common 

 cavity, into which the branchiai can be partially withdrawn, 

 is slightly raised and fringed with long papillae. The oral 



Ann. & Mag. N. Hist. Ser. 4. Vol. xviii. 10 



