324 REConits of the Australian mdsfum. 



Anatonnj. — Described aud figured by Plate. 



Group cli((ri(cter. — Anterior portion (jf the penis sinootli and witliout 

 hook($ ; a cartilaginous tube is present. 



Localifi/. — New Britain, South-western Pacific (Plate). 



OXCUIUELLA PATKLLOIDKS, QllOlJ mid (I'diiiuird. 



Oiirliidium pateUoides, Quoy and Gainiaid, Vo}'. "Astrolabe", Zool., ii., 



1832, p. 212, pi. XV., figs. 21-28. Id., Dieffenbach, Travels in N. 



Zealand, ii., 1843, p. 247. Id., Martens, Crit. List. Moll, of N.Zealand, 



1873, J). 39. /(/., Semper, lleis. ini Arc^h. Phil., iii., r^andmoll., vi., 



1882, p. 279. 

 ( hiridii'Jht jndflloidefi (Quuy and Gainiard), Wissel, Zoiil. Jahrb., Syst., xx., 



1904, p. 667, pi. XXV., figs. 75-77. 

 Oiirliidelln iiidelliiidex (Quoy and Gaiinard), Hutton, Man. N.Zealand 



Moll., 1880, p. 28. Id., Suter, Man. N.Zealand Moll., 1913, p. 813, 



pi. xxxii., fig. 4. 

 Uiichidella jiatellvidea (Quo}' and Ciainiard), H. & A. Adams, Gen. Rec. 



Moll., ii., 1858, p. 234. 

 OiirhidhiDi reticuhitHrn, Semj)ei', Reis. im Arch. Phil., iii., Landmoll., vi., 



1882, p. 278, taf. xx., fig. 6, taf. xxi., figs. 16, 20, 23, taf. xxiii., fig. 1. 

 Oncldiella rettcidata (Semper), Plate, Zool. Jahrb., Anat., vii., 1893, p. 205. 

 Oiiclidelld patellnlde (Quoy and Gainiard), Gray, Fig. Moll. An., iv., 1850, 



p. 117. 



I'J. denial character. — Body oval, back elevated. Mantle border more 

 or less notched. Head small, tentacles short and conical. Hyponota 

 wrinkled and nearly the same width as that of the foot sole. Hyponotal 

 line distinct. 



Average size: Length 26 mm., breadth 17 mm., height 8 mm., 

 greatest width of the foot sole 12 mm. 



Matitle sciiliitiire. — The mantle is finely granulated between a variable 

 number of large papillne ; marginal glands may be prominent and whitish 

 in cdIoui', and nutnbeiing from sixteen to twenty. 



('iiloiir. — The ground colour of the mantle is yellowish brown ; a 

 variable pattern is piesented in diffeient specimens, radiating black 

 streaks being often conspicuous ; bnt the streaks may vaiy in depth of 

 colour and may be almost inconspicuous. 



The front of the head is black; the rest of the underside being 

 regulaily gieyish white. As mentioned above the maiginal glands are 

 whitish in coloui', and in some cases are very consj)icuous against the 

 darker background. 



Posifioi nf oiieiiiiKjs. — The anal papilla is protected by the tail of the 

 foot sole ; the respiratory opening in the median line is close to the anal 

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



Avcitoun/. — Desci'ibed by Wissel, Semper, Hutton ajid Suter. 



itraiij) i-lniractf'r. — A j)pen(liculai' gland and caitilnginous element 

 absent. 



0//.S-. — An examination of a series of specimens fi'om New Zealand, 

 Port Jackson and Tasmania, shows a considerable variation in the colouring, 



