806 MR. E. A. SMITH ON MARINE SHELLS [Nov. 5, 



the Andaman Islands, as the type shells were described as East- 

 Australian. The specimen before me, which is apparently adult, has 

 a length of 21 millims., and the last whorl is 4 in diameter. The 

 costas (about 18 on a whorl) are thickest at the upper extremity, 

 above the sulcus which parts off the infrasutural belt, gradually 

 attenuating downwards, and at length become quite obsolete at the 

 extreme base of the body-whorl. 



7- Mtjrex (Muricidea) cirrosus, Hinds. 



Hab. Straits of Macassar (Hinds). 



Some small specimens of this charming shell were dredged by 

 Capt. Wilmer, one of which possesses an unusually long canal. 



8. Murex (Muricidea) rusticus, Reeve. (Plate L. fig. 5.) 



Hab. ? 



I feel uncertain whether the Andamanese shell is without doubt the 

 same species as that figured by Reeve. It agrees very well with the 

 description, but exhibits some difference from the figure, which is 

 very coarsely executed. The number of transverse ridges is greater, 

 the" mouth a little smaller ; and the fronds, although a little broken 

 and worn, would not I think, if perfect, be as long as those repre- 

 sented in the figure. 



9. Murex (Muricidea) barclayana, H. Adams. 

 Coralliophila barclayana, H. Ad. P. Z. S. 1873, p. 205, pi. 23. 



fig. 1. 



Hab. Mauritius (H. Ad.). 



The Andamanese specimen of this species, the type of which is 

 now in the British Museum, is only 2 1 millims. in length, yet appa- 

 rently full-grown. Its coloration is much less brilliant than the 

 representation of the described shell, being pale pinkish white, with 

 the lateral varix and the termination of the canal tinged with brown, 

 the aperture being light purple. 



10. Murex (Ocinebra) breviculus, Sowerby, Proc. Zool. Soc 

 1840, p. 146; Conchol. lllustr. fig. 37. 



M. tetragonus, Reeve (non Broderip), Conch. Icon. iii. fig. 118. 



Hab. ? 



A single, much worn, yet undoubted example of this species is 

 valuable as indicating the habitat of so interesting a form. Reeve 

 considers it a short variety of Broderip's M. tetragonus, the 

 figure he gives of the latter representing a typical breviculus. M. 

 tetragonus proper is well figured by Sowerby in his ' Conchological 

 Illustrations,' fig. 25. Judging from the specimens of the two species 

 which I have examined, all of them unfortunately in a more or less 

 worn and faded condition, I am of opinion that they are specifically 

 distinct. Besides the much stouter and less-produced form of M. 

 breviculus, its aperture is larger and more circular, white or slightly 

 blotched with brown far within ; the transverse costae, especially 

 on the obtuse varices, are also brown. M. tetragonus, on the other 



