u.NOiiimin.f — i:i;ftnai.i.. 32:j 



OnCIS CORIACKA, iSi'iiiper. 



OnrJn'tli'iitii rorideeuni. Semper, Reis. im Arcli. Phil., iii., Laiulinoll., vi., 



1882, p. 271, taf. xix., fips. 1, 16, taf. xxi., fig. 7, taf. xxiii., fig. 12. 

 (hirix roridcea (Semper), v. Martens in Webei-, Krgebnisse, iv., 1897, p. 



127. Ill, Plate, Zool. Jahrb., Anat., vii., 189.S, p. 185. 

 ? Onehidiiihi tiqrinnm (Stoliczka), Semper, Ileis. ini Arch. Phil., iii., 



Landmoll.,' v., 1880, p. 271. 

 ? Onchid'iam viannoratum (Lesson), Semjter, Reis. im Arch. I'liil., iii., 



Landmoll., vi., 1882, p. 271. 

 .'' Oiicifliinn niurmorafiiiii (Lesson), Plate, Zool. Jahrb., Anat., vii., l89o, 



p. 185. 



E-ytennil rhiiructeri^. — Body oval, somewhat depressed. Head laige, 

 tentacles veiy long and slightly lobed at the tips. Mantle borders smooth. 

 Underside flat. Hyponota smaller than the greatest width of the foot sole. 



Average size: Length 47 mm., breadth 27 mm., height L5 mm.; 

 greatest width of the foot sole 10 mm. 



Maiifle scid2^tiiiT. — The mantle is finely granulated between a number 

 of short conical papillae, some of which bear eyes in varying numbers. 



CoJanr. — The ground colour of tlie mantle is olive, with an irregulai- 

 darker pattern ; the undeiside is regularly yellowish. 



Position of ope)i.iiigs. — Typical of the genus. 



Anatomy. — Described by Plate. 



Gronp character. — Anterior portion of the penis witli small cartilaginous 

 hooks ; a cartilaginous tube is present. 



Locality. — Brisbane, Queensland (Semper, Godeffroy Museum) ; 

 Finclie's Bay, Cooktown, Queensland (AustraliaTi Museum). 



Oncis lata, Plate. 



Oncis lata, Plate, Zool. Jahrb., Anat., vii., 1893, p. 189, taf. vii., fig. 2. Tel, 

 V. Martens in Weber, Ergebnisse, iv., 1897, p. 127. 



E.i'tental characters. — Body bi'oadly oval, almost circular and moder- 

 ately high, but not strongly arched. Head small, tentacles short and 

 conical. Mantle borders smooth. Hyponota smaller than the greatest 

 width of the foot sole. 



Average size : Length 29 mm., breadth 27 mm., height 17 mm. ; 

 greatest width of the foot sole 8 mm. 



Mantle sculpture. — The mantle is regulaily covered with granules 

 and papillae. The papillas are conical in shape, and standing one mm. in 

 height and from four to five mm. apart give the mantle a prickly appear- 

 ance. Eyes are present on all the papilla?. 



Colour. — The ground coloui- of the mantle is brown ; a pattern is 

 foi-med by irregularly shaped and placed white flecks. The foot is dirty 

 grey in colour, while the hyponota aie olive verging to a darker area 

 around the mantle border. 



Piisittiiii (if opeiiimis. — The anal [lapilla is lai'ge but not high ; the 

 resj)iratoiy opening in the median line is closer to the mantle border than 

 to the papilla. Male and female genital openings typical of the genus. 



