NEW SPECIES OF SHELLS. 
397 
much closer, and the interstices not grooved. The colouring and 
form of the apex, as well as of the canal, are curiously similar, as 
also the beading at the top of the ribs. 
Oyulum (Birostra) Ha vnest, sp. nov. (PI. XXV. figs. 1, 2.) 
Testa elongata, angustata, albida, polita, utrinque rostrata, postice 
attenuata, antice subtruncato-acuminata, extremitatibus acutiusculis, 
lateribus leviter convexis ; apertura medio angustissima, postice paulo 
latior, antice dilatata ; columella convexa, nitidissima, labrum incrassatum, 
leviter sinuosum. 
Long. 34, maj. diam. 7 millim. ; apert. maj. lat. 2j, min. vix 1 millim. 
Hob. Exmouth Gulf, W. Australia (./. H. Haynes). 
A graceful species allied to O. Ph ilippin a rum, but larger and 
differing in form. 
The specimens are nearly white, being found attached to a 
very handsome white species of Melitodes , which is also probably 
new to science, and of which Mr. Haynes collected several 
specimens in the above-named locality, one of which he presented 
to the Natural History Museum at South Kensington. The 
colour of Ovulum is probably determined by that of the place of 
attachment, as is the case with several well-known species which 
occur on West-Indian Grorgoniae, so that should specimens be 
fouud attached to Melitodes ochracea (of which Mr. Haynes found 
several in the same locality) they would probably be of an orange 
colour. Hitherto, however, they have only been found on the 
white species. 
Trochus (Infundibulum) baccatus, sp. nov. (PI. XXV. 
figs. 8, 9.) 
Testa breviter conica, late umbilicata, luteo-albida, nigro fuscoque 
punctata ; anfractus 6, convexiusculi, spiraliter striati et granulis gem- 
muliformibus nigro-fuscis, fulvis et albidis quinqueseriatim dispositis 
instructi ; anfractus ultimus ad peripheriam augulatus, infra planato- 
convexus, liris 6, angustis, parum elevatis, fusco articulatis ornatus ; apertura 
obliqua; columella oblique rectiuscula. 
Alt. 12, maj. diam. 14 millim. 
Hab. Mauritius. 
A pretty little species, regularly and exquisitely spotted and 
beaded. 
Thalotia Wilkie, sp. nov. (PI. XXV. figs. 10, 11.) 
Testa conica, data, grisea, albo fuscoque maculata et strigata; apice 
fusco ; anfractus 7, planato-declives, ad suturam undulatim angulati, 
spiraliter multi-lirati, liris rugosis, hie illic irregulariter nodulosis; an- 
fractus ultimus inferne angulatus ad basin levissime convexus, angus- 
30* 
