220 Transactions. — Zoology. 



tudinals. In addition there are on the anterior end a few 

 more crowded and rather smaller. The interspaces with spiral 

 str^e, four or more, usually minute, sometimes almost micro- 

 scopic. Outer lip with usually five well-marked sinuations 

 corresponding to the principal spirals, posterior sinus shallow. 

 Length, 6 - 83 mm. ; breadth, 2-5 mm. 



Type in the Colonial Museum. 



Hab. Whangaroa Harbour (Mr. A. Hamilton). 



This form appears to somewhat approach Mangilia con- 

 nectans, Sowb.,* from South Australia. 



Mitromorpha suteri, n. sp. Fig. 6. 



Shell small, fusiform, somewhat thin, with fine spiral and 

 usually somewhat obsolete longitudinal riblets. Colour light 

 reddish - brown, sometimes a pale band around the periphery, 

 occasionally a narrow darker band at the sutures. Whorls 5, 

 lightly rounded, the last longer than the spire. Protoconch of 

 two whorls, somewhat globose, smooth and polished, the apical 

 turn oblique to the succeeding whorl. Sculpture : The penulti- 

 mate whorl with six to seven and the last with sixteen to twenty 

 spiral riblets, seven or eight of which are in front of the aperture ; 

 they are slightly variable in strength, some in breadth equal 

 to the interspaces, others rather narrower ; also an occasional 

 small thread here and there arises in the interspaces. Longi- 

 tudinals irregular, low and rounded, more distinct on the spire, 

 frequently obsolete. The growth strife irregular, somewhat 

 marked, and frequently cutting up the spirals into minute 

 gemmules. Sutures impressed, usually margined with a wider 

 riblet. Aperture somewhat narrow, rather longer than the 

 spire. Outer lip thin, a little flattened ; the posterior sinus 

 broad, well marked. Columella almost straight, concave and 

 lightly callused ; the canal short and broad. Length, 4*56 mm. ; 

 breadth, 1*70 mm. 



Type in the Colonial Museum. 



Hab. Whangaroa Harbour (Mr. A. Hamilton). 



At first glance this species might easily pass for a Columbella. 

 From M . substriata, Suter, it is at once distinguished by its colour 

 and much stronger spiral sculpture. It appears to be nearest 

 to M. subabnormis ,f Suter, the latter characterized by the well- 

 developed oblique longitudinal riblets. Suter described this 

 species as Clathurella, but it would appear to be more in harmony 

 with Mitromorpha. 



I have much pleasure in associating with this species the 

 name of Mr. Henry Suter, of Auckland. 



* Proc. Mil. Soc. Loudon, vol. ii.. |>. 'M). pi. iii.. fig. I t. 

 t Trans. N'.X. [nst., vol. w\i.. p. 74. pi. iii.. figs. .">. 5a. 



