MOLLTJSCA. 63 



^ 65. Eissoina cnrtisi. (Pl^xe V. fig. M.) 



Shell elongate, thick, white, very coarsely cancellated. Number 

 of whorls unknown, the apex being broken ofE ; the remaining four 

 are obliquely sloping at the upper part, and, with the exception of 

 the last, biangulated at the sides, the angles being caused by the 

 prominence of two spiral lirse upon the longitudinal costae. A third 

 lira is seen at the base of the whorls at the suture. The costse are 

 about fourteen on a whorl, about as thick as the transverse ridges, 

 and nodulous at the points of intersection. The body-whorl has 

 five spiral lirse, the lowermost being separated from those above by 

 a broad smooth furrow, in which the costse are almost obsolete. 

 Aperture obliquely subovate, rather widely channelled in front. 

 Columella oblique, covered with a thin callosity, which at the base 

 forms the sinistral side of the canal. Labrum much thickened ex- 

 teriorly, acute at' the margin, and (viewed laterally) is produced to 

 the left at the front part. 



Probable length about 7 millim. ; actual length of remaining four 

 whorls 5^ millim., width 2^. 



Hah. Port Curtis, 7 fms. 



This species might be considered a dwarfed, strongly cancellated 

 form of 11. clathrata ; it is less slender, has fewer and stouter costae, 

 and the spiral lirse are also thicker and two in number upon the 

 upper whorls exclusive of those at the suture, whilst in the species 

 referred to there are three. The outer lip is much thickened and 

 the aperture rather more contracted. 



66. Cerithiiuu morns. 



Lamarck, Anim. sam Vert. ed. 2, vol. ix. p. 302 ; Kiener, Coq. Viv. 



p. 52, yl. 15. fig. 1 ; Sowerhy, Thes. Conch, figs. 169-161 ; id. Conch. 



Icon. fig. 42. 

 Var. = Cerithium moniliferum, Dufresne, Kiener, Coq. Viv. p. 49, 



pi. 16. fig. 3 ; Sowerhy, Thes. figs. 163, 165 ; id. Conch. Ic. fig. 20. 

 Var. = Cerithium carbonarium, Sowerby (non PhiUppi), Conch. Icon. 



fig. 59. 



Hah. Philippine Islands {Cuming) ; Samoa Islands (Rev. S. J. 

 Whitmee in Brit. Mus.) ; Port Jackson, 7 fms. ; Friday Island, 

 Eoko Island, Endeavour Strait, and West Island, Prince of Wales 

 Channel, Torres Straits (Ooppinc/er) ; Dungeness Island, Torres 

 Straits (Brazier) ; HaU Sound, New Guinea (Brazier). 



The small group of species to which O. morus belongs, including 

 C. tuherculatvm, of Linnaeus as defined by Hanley (' Ipsa Linnsei 

 Conchylia,' p. 276, pi. iv. fig. 4), C. lemniscatum, C. hreve, and O. 

 variegatum., Quoy and Gaimard, O. petrosum and 0. rugosum of 

 Wood (non Lamarck) = O.patiens, Bayle, G. moniliferum, Kiener, G. 

 gemma, G. purpurascens, G. hifasciatum, G. pupa, and G. nigro- 

 fasciatum of Sowerby, is very perplexing, owing to the great simi- 

 larity in sculpture of the various species. 



1. C. tuberculatum, to which I unite as varieties C. variegatum. 



