372 Transactions. 



Remarks. — This shell was first shown to me by Mr. Howard 

 Hill, of Napier, who told me that the examples in his possession 

 were collected by the late Rev. W. Colenso, the exact locality 

 being unknown. It may well be that the species ranges from 

 the East Cape down to Hawke's Bay. 



22. Cuspidaria fairchildi, n. sp. Plate XXIX, fig. 19. 



Shell small, thin and fragile, ovate, with a long and straight 

 posterior rostrum, concentrically finely striate, almost equi- 

 valve, inequilateral. Beaks small, sharply pointed, directed for- 

 wards, situated a little in front of half the length ; prodisso- 

 conch small, roundly ovate, smooth. Anterior end narrowly 

 rounded, the dorsal margin slowly descending, straight ; pos- 

 terior end produced into a long straight rostrum, gaping at 

 its end ; basal margin broadly rounded, slightly concave on ap- 

 proaching the rostrum. Lunular area very little excavated. 

 Sculpture consisting of very fine and dense concentric stria', 

 with but little stronger inequidistant marks of rest ; the ros- 

 trum finely concentrically lamellate, without radial sculpture. 

 Colour white, lightly iridescent in some places. Interior white, 

 shining, finely radially striate ; margins smooth. Hinge-plate 

 very narrow, slightly buttressed posteriorly, with a small re- 

 silifer below the beaks ; right and left valve with a very small 

 posterior lateral tooth. Ligament very small, linear. Muscle- 

 scars rather large ; pallial sinus not deep, broadly rounded. 



Length, 13 mm. ; height, 6 mm. ; diameter, 44 mm. 



Type in the Dominion Museum, Wellington. 



Hob. — Dredged in the " sixties " by the late Captain Fair- 

 child off Flat Point, in 75 fathoms. One perfect specimen and 

 one left valve. 



Remarks. — At once distinguished from C. trailli, Hutt., by 

 the absence of concentric sharp laminae and radial ridges on 

 the rostrum ; Hutton's species has a very distinct anterior 

 and posterior lateral tooth in the right valve. 



EXPLANATION OF PLATES XXVIII-XXX. 

 Plate XXVIII. 

 Fig . 1-2. Tonicia cunmta, Suter. 22 mm. by 11 nun. 



Fig 

 Fig 

 Fig, 

 Fig 

 Fig 

 Fig 

 Fig 

 Fig 



:}. S<ila cochlcatu. Suter. 3-8 nun. by KK r > mm. 



4. Adis succincta. Suter. 1-1 nun. by 2*6 mm. 



5. Pyramiddla (Eulimdla) limbata. Sutor. 1-6 nun. by 5 mm. 

 ip. Orfosimititi himbix. Snttv. '.] nun. by f> nun. 



7. .. tmimakicnsis. Suter. 1-6 nun. by 3-2 mm. 



8. .. inornate, Suter. 2-5 nun. by 6-1 mm. 



«t. ,, densdirata, Suter. 1-26 mm. by 2*5 mm. 



lu. ., takwpunaensie, Suter. 2-2 mm. by 4 mm. 



