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 lamella are arranged with 

 a regular irregularity (which gives a shagreened appearance to the 

 surface) between the carime, 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 specimen taken, though destitute of the apical whorls, 

 seemed too remarkable to leave undescribed. It has a general 

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

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

 on the pillar. (Dall.) 



Off Cuba, 200 fins. 



Margarita (Turdcula) imperials BALL, Bull. M. C. Z. ix, p. 42 ; 

 xviii, p. 376. 



T. BAIKDII Dall. 



A species of this group from the Pacific, off 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 Vivipara or 

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

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



This species may belong to or near Turcicula. 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, 

 sntnris alte insculptis; superficie spirse tota valide tuberculosa, 

 seriebus tribus, alteris postea intercalantibus ; peripheria et basi 

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

 scabris, hand tuberculosis ; lacuna umbilical! vix conspicua ; aper- 

 tura subrotundata ; labro tenuissimo ; labio obsoleto ; columella 

 arcuata. Long. M, long. spir. -65, lat. '75, div. 60. (Carpenter.') 

 Neeah Bay, Washington Territory. (Swan.) 

 Margarita cidaris (Ad.) CARPENTER, Ann. and Mas. X. H. xiv 

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



