Molliisca.] SUBANTARCTIC ISLANDS OP NEW ZEALAND. 41 



hyponotum. Mantle-area transversely triangular, the renal orifice in the anterior 

 angle, the respiratory opening in the middle near the median groove, anal orifice 

 in the right outer corner, within the area. 



Length over back from head to tail, 34 mm. ; width of back to perinotum, 

 11 mm. 



Hob. — Auckland Islands, two specimens (Professor Benham). 



Var. fasciatus (v. Mts.), Simroth, em. (fuscatus). 



Back of the animal Ught brown, with three longitudinal rows of black streaks. 

 The renal, respiratory, and anal orifices in the same places as in the other variety. 

 Side grooves but rarely bifurcating. Notum with very numerous papillae, some 

 of them of a slightly larger size. 



One specimen has the verge exserted ; it is cylindrical, with 6 sharp longitudinal 

 ridges, armed with dense minute spines. 



Jaw elasmognathic. Kadula with very numerous teeth, having a broad reflec- 

 tion, with 7 to 8 denticles, the inner one largest. I was unable to find a central 

 tooth in the radula I prepared. Simroth states that he found the radula exactly 

 like that of A. marmoratus, but the rake-shaped teeth with 5 to 7 denticles, instead 

 of 4 to 6. 



Hab. — Auckland Islands, very common (Professor Benham). 



Specimens from cliffs near head of North Arm of Carnley Harbour have larger 

 papillae on the back. 



Fam. ONCHIDIDAE, Philippi. 

 Genus Onchidella, Gray, 1850. 

 Distribution. — Littoral zone of most seas. 



Onchidella campbelli, Filhol, 1880. 



Onchidella campbelli, Filhol, Compt. Rend., xci, 1880, p. 1094; Miss. I.C, 1885, 

 p. 521. 



Resembling 0. nigricans, Q. and G., but the marginal pores are much more 

 numerous. 



^a6.— Auckland Islands ; Campbell Island (Professor Chilton). 



Fam. DENTALIIDAE, Gray. 

 Genus Dentalium, Linne, 1758. 

 DistribiUion.— AW seas, some species living in great depths. 



Dentalium nanum, Hutton, 1873. 



Dentalium nanum, Hutton, Cat. Tert. Moll. N.Z., 1873, p. 1 ; Plioc. M., p. 73, 

 pi. viii, fig. 78. 

 Hob.— Ten miles north of Enderby Island, in 85 fathoms (B. R. Waite). 

 Also North and South Islands of New Zealand. 



