312 Transactions. 



anterior and "posterior dorsal angles are much less apparent, 

 thus narrowing the shell before and behind. Old specimens 

 are much more thickened within than D. menziesi, and con- 

 sequently much heavier ;] the nacre is also more brilliant. 



I append the short description of this shell by Mr. Simpson 

 (" Nautilus," July, 1902) : " Shell long, rhomboid, compressed 

 or subcompressed, inequilateral ; beaks subcompressed, pointed, 

 their sculpture apparently a few irregular lachrymose nodules 

 arranged in a somewhat radial pattern ; surface with uneven 

 growth-lines and impressed rest-marks, sculptured throughout 

 with lachrymose nodules, which are often V-shaped, those 

 along the upper part of the low posterior ridge slightly 

 knobbed ; epidermis dark olive-green clouded with lighter 

 green, rather dull ; pseudo - cardinals small, subcompressed, 

 granulose, two in each valve ; laterals straight, two in the 

 left valve, one in the right ; muscle-scars small, shallow, and 

 irregular ; nacre bluish, lurid -purple near and in the beak- 

 cavities, thicker in front. Length, 67 mm. ; height, 32 mm ; 

 diameter, 14 mm. : length, 62 mm. ; height, 32 mm. ; dia- 

 meter, 17 mm. ... A new species apparently allied to 

 D. novai-hollandicE, Gray, of Australia, but smaller, less in- 

 flated, and less solid than that species. In D. novaj-hollandice the 

 anterior one-third of the shell is almost destitute of nodules, 

 in the present species the whole surface is covered with them. 

 These resemble somewhat those found in the TJnio tubercu- 

 latus, Barnes, but are less elevated." 



Turbo shandi, Hutt, (Astralium Ind. F.N.Z.) 



I recently received from Mr. R. Murdoch two specimens 

 of this shell authenticated by the late Professor Hutton : thev 

 proved to be the young of Turbo granosus, Mart. 



EXPLANATION OF PLATE XXXIX. 



F'f la [Trochus camelophorus, Webster. 



jrc o ' T. (danculm) takapunaensis, Webster. 



Fig. 3. | 



Fig. 3a. (• Trophon waipipicola, Webster. 



Fig. 36.) 



F'° 4 I Phrixgnathus serratocostata, Webster. 



Fig. 5. 



Fig. 5a. V TJnio (Diplodon) websteri, Simpson. 



Fig. 56.) 



Fig. 6 Unio (Diplodon) nova-hollandice, Gray. 



