oNi'iiihiihi: — r.i.'FTNAi.i,. ;-5l7 



(liiridlinii ( iniiiihiiii, Pliilc, Zonl. .liilirh., Aiiivt., vii., ISS).'}, p. 17i!. 



f ())ii-lt!diain pKiicliitiiiii ((.^iu)_v and ( iaiiiiiii'd), Si'iiipi'r, Keis. i)ii Arch. IMiil., 

 iii., Laiidnioll., v., 1880, )>. -IS'.). /-/., Sinitli, Voy. " Alert", Zo(.l., 

 1884, p. 1)2. 



rcniiii((, ^/i., SfliiiH'lt/, Cat. Mas. (ii)dflTn)V, v., I871', No. l')?!;!, p. '.Ml. 



Z" I'l-nuii'ii pnncUtUt (Cihioy and ( laimard), 'I'apparoin' ('a nrlri, l<'iiiiii. Mai. 

 N. Guinea, 188o, p.'-214. 



External characlerti. — Budy egg->slia[)ed, bark strongly arched. Maiitlf 

 border smooth. Head small ; tentacles long. Hyp<jnota smallej- than 

 the greatest width of the foot sole. 



Average size: Length iif) mm., Inradtli 22 mm., height 15-20 mm. ; 

 greatest width of the foot sole 17 mm. 



Maufle acitlptiirr. — The mantle is densely covered with large and 

 small granules. Irregularly arranged ai-e a great number of pointed 

 papilla-, and between these stand the somewhat flattened eye bearing 

 papilhe, which are most numerous in the middle Held. The eyes are in 

 groups varying from two to fourteen. 



Coluiir. — The ground colour of the mantle is olive, verging to a 

 lighter yellowish colour near the mantle border. The uiulerside is 

 regularly grey. 



FositioH of opeiiiiK/r;. — Typical of the genus. 



Anatomy. — Partly described and figured by Semper and Plate. 



(Iroiip character. — Anterior portion of the penis with small cartila- 

 ginous hooks; posterior portion soft, and without cartilaginous element. 



Locality. ~^Fovi Mackay, Queensland (Semper); Xudgee and Brisbane, 

 Queensland (Australian Museum) ; Ponape, South-western Pacific (Plate). 



Oxi iiinirM I'APUAM'.M, Semper. 



Oiichldliiiii papihiHiiui, Sempei', lieis. im Aj'cIi. Phil., iii., Landmoll., vi., 



1882, p. 276, taf. xxi., fig. 17, taf. xxii., fig. ;>. 



I'eroiiia pupnaua (Semper), Tapparone Canefri, Kaun. Mai. N.Ciiiinea, 



1883, p. 215. 



E.i'teriiaJ characters. — Body oval in shape, back strongly arched. 

 Mantle borders smooth. Head laige ; tentacles short. Hyponota smaller 

 than the greatest width of the foot sole. 



Average size: Length 13-15 mm., breadth 9 mm., height <i-7 mm. ; 

 greatest width of the foot sole 6"5 mm. 



Mantle sculpture. — The mantle is regularly covered with small gi-an- 

 ules, with larger graimles irregularly situated over the surface ; between 

 the granules stand small conical tubercles bearing eyes in gi'oups of three 



to foui'. 



Colour. — The ground colour of the nianllc is dark grey: a radiating 

 pattern of olive to light brown varies in strength of colour in different 

 specimens. The underside is regularly olive. 



