South- African Land-MuUusca. 573 



M orking at this grouj) of molhiscs are corneus, Pfr., poeppi(/i\ 

 iMr., iiatulensis, Kvs., inunctus, M. & P., and jtltiedimiis, 

 xM . it P., three of the oldest and two of the hitcst tlescribed ; 

 and, as Piiriiiip very accurately writes, "the diliiculty of 

 recognizing the earlier described species is a terrible barrier 

 to coni[)letion/' 



I asked him what is conuus? to which he replies : — 

 " It seems reasonable to suppose that, however many rare 

 shells they may have found, the early discoverers would find 

 most of the commonest ones. Fliadimus, M. & P., is very 

 plentiful at P(.irt Natal, i, e. Durban, as elsewhere in the 

 l>rovinee ol' Natal. Can you realize the possibility of corneus 

 being j)/i(ediinus V According to Pfeitier's dimensions, corneus 

 is relatively one of the lowest shells of the g\o\x\i, phcedimus 

 is one of the lowest of those known to me. That the typical 

 p/ui'dimus from the mid lands is smaller than what I take to 

 be the same species from the coast need not be considered, 

 there are so many instances of the coast shells being larger 

 than those from the mid and hi^h lands, 'i'hat ]>/icedimus 

 trom the mid lands almost invariably has a supraperipheral 

 band, while the same (?) species from the coast only sometimes 

 has, must be an insignificant point." To confirm this 

 Mr. Burnup sends me four specimens of jdictdinius from 

 Maritzburg, all banded; three unhanded with one banded 

 from Durban : they jnesent no difference save in size. The 

 .shell ot the animal dissected and described by me, supplied 

 by Ponsonby from Maritzburg, agrees exactly. 



Kerhopliorus plia^dimus, M. & P. (PI. V. fig. 3 ; 

 PL XIII. figs. 1-10.) 



Maritzburg. 



Animal (figs. 1, 2) very pale in colour, with a long, narrow, 

 keeled foot indistinctly divided, and having a very long arched 

 lobe (fig. 3) above the mucous pore. A broad, large, pointed 

 right shell-lobe {rsl) and a broad left shell-lobe (Isl) ; they 

 unite behind at the keel of the foot, and in life must cover 

 the greater part of the shell. Right dorsal lobe {rdl) small ; 

 the left entire, covering the neck. Peripodial grooves very 

 indistinct, showing better on the anterior margin. On the 

 visceral sac (fig. 5, vs) near the rectum (r) and heart {h) are 

 white mottlings, which extend and increase to a band of that 

 colour towards the apical whorls, the rest of which is black. 



Gtnerative oryans (PI. V. fig. 3). — The penis has a 

 lonf, tapering, rather twisted flagellun), the vas deferens 

 joining near the base. The epiphallus is short. Adja- 

 cent to the attachment of the retractor muscle there is a 



