TL'RCICULA. 



331 



two indistinct threads run in the vicinity of the suture ; on the 

 revolving ribs above mentioned there are regularly disposed sharp 

 rough tubercles (seventeen on the last whorl), most prominent on 

 the middle carina ; the above-mentioned lamellae are arranged with 

 a regular irregularity (which gives a shagreened appearance to the 

 surface) between the carinre, and are still coarser and more elevated 

 over the threads near the suture, forming there a double row of 

 scales partly obscuring the suture, which is nevertheless rather deep. 



Alt. of last whorl 10, diam. 13 ; alt. of aperture, 5"5, lat. of same 

 6-25 mill. {Dall.) 



The single sjDecimen taken, though destitute of the apical whorls, 

 seemed too remarkable to leave undescribed. It has a general 

 resemblance to some of A. Adams's species of Turcica, from Eastern 

 seas, but has a peculiar and remarkable sculpture and wants the teeth 

 on the pillar. {Dull.) 



Off Cuba, 200 fms. 



Margarita ( Tureicula) imperialis Dall, Bull. M. C. Z. ix, p. 42 ; 

 xviii, p. 376. 



T. BAIRDII Dall. 



A species of this group from the Pacific, oS Lower California in 

 400 fms., was dredged by the Albatross. It is 50 mill, high, 42 

 wide ; is covered with a delicate green epidermis which erodes 

 like that of a fresh-water shell, and exhibits a nearly circular aper- 

 ture, with a somewhat reflected lip and brilliantly pearly throat. 

 There is no callous across the body, nor any umbilicus. The shell 

 bears a singular resemblance to a very large thin greenish Yiv'qmra or 

 Tulotoma. {Dall, in ' Blake ' Rep., Gasterop., p. 377.) 



T. (?) ciDARis (A. Adams) Cpr. 



This species may belong to or near Tureicula. I have no infor- 

 mation save the original description ; no figures have been published. 



Testa magna, conica, Turcicoidea, tenui ; albido-cinerea, nacreo- 

 argentata ; anfr. nucleosis — ? (decollatis), norm, vii, subplanatis, 

 suturis alte insculptis ; superficie spirje tota valide tuberculosa, 

 seriebus tribus, alteris postea intercalantibus ; peripheria et basi 

 rotundatis, carinatis; carinis circ. 8, hand acutis, irregularibus, 

 scabris, hand tuberculosis ; lacuna umbilicali vix conspicua ; aper- 

 tura subrotundata ; labro tenuissimo ; labio obsoleto ; columella 

 arcuata. Long. M, long. spir. -Qo, lat. '75, div. 60°. (Carpenter.) 

 Neeah Bay, Washington Territory. (Sican.) 



Margarita cidaris (Ad.) Carpenter, Ann. and Mag. N. H. xiv 

 (3d ser.), p. 426, 1864. 



