SMITH : MARINE SHELLS FROM NEW ZEALAND. 21 



but the two last-mentioned are somewhat doubtful. There are other 

 forms which, although not absolutely identical with South Patagonian 

 species, are represented in that locality by very closely related forms. 

 For instance, Lotorium vexillum, Sby., from Chiloe and Cape Horn, 

 is scarcely separable from L. tumidum, Dkr. 



Tr Of lion spiratus, H. & A. Ad., and T. cretaceus, Eeeve, are repre- 

 sented in the Straits of Magellan by T. Geversianus, Pallas. Patella 

 denticulata, Martyn, is allied to P. (Bnea, Martyn; and the genus 

 Struthiolaria, which was supposed to be restricted to New Zealand, 

 has of recent years found a representative at Xerguelen Island, in 

 S. [Perissodonta) mirahilis, Smith. 



Some of the species already mentioned also occur at the Cape of 

 Good Hope, namely, Mytilus Magellanicus, Chem., and Saxicava 

 arctica, L. ; whilst the Lascea rubra, Mtg., is probably inseparable from 

 the forms which occur in Patagonia and in Kerguelen and Macquarie 

 Islands. Two species of Lotorium (Z. argus, Smith, and L. Murraiji, 

 Smith) occurring in South Africa have Patagonian representatives in 

 L. vexillum, Sby., and L. Magellanicum, Chem., respectively. The 

 islands of St. Paul and Amsterdam, in the Southern Indian Ocean, 

 also appear to be affected slightly by the flow eastward of Patagonian 

 forms. At all events, Lascea rubra, Mtg., and Lotorium vexillum, 

 Sby. (^ = proditor, Prfld.), have been quoted from there. "^ The con- 

 clusion seems to be that certain forms, whose metropolis at the 

 present time is Patagonia, have been, through the agency of ocean 

 currents, transported to quite distant localities. Patagonia, the 

 Falkland Islands, Marion, Prince Edward, Crozet, and Kerguelen 

 Islands have very similar faunas, and now Macquarie Island proves 

 to some extent to belong to the same faunal region, to which, but in 

 a less degree, also belong Tristan da Cunha, St. Paul, and Amsterdam 

 Islands, a few of the Antarctic forms having also reached as far north 

 as the Cape. 



1. MiTEA ALBOPiCTA, n.sp. Fig. V. (p. 22.) 



Testa breviter fusiformis, castanea, infra suturam strigis albis 

 brevibus irregularibus picta, circa medium et ad basim anfractus ultimi 

 albo maculata ; spira conoidea, acuta ; anfractus 7, paulo convexi, 

 sutura mediocriter profunda sejuncti, superiores oblique et confertim 

 costulati (costis in ultimo plus minus evanidis), striis spiralibus paucis 

 infra suturam sculpti, ultimus ad basim oblique et tenuiter striatus ; 

 apertura intus fuscescens, longit. totius ^ paulo superans ; labrum 

 superne leviter incrassatum ; columella paululum obliqua, pallida, 

 quadriplicata ; canalis anterior brevis, vix recurvus. Long. 21 '5, 

 diam. 9 '5 mm. 



Sab. — Mokohinau Island. 



In form and general proportions resembling M. pica, Eeeve, but 

 larger and differently coloured. 



1 Velain, Arch. Zool. Experira., 1877, vol. vi, pp. 100, 135. 



