DESCRIPTIONS OF SIXTY-EIGHT NEW SHELLS. 89 



ultimum, depressis, undique concentrice tenuiliratis, ultimo recto, tribus 

 carinis acutissimis prsedito, prominulis, quorum superiore carina extia labrum 

 projecta porrectionem trialatam prsebente ; apertura rotunda, labro extus 

 tricarinato, intus simplici. 

 Alt. 2, diam. 3'50 mm. 

 Hab, Gulf of Oman, lat. 24° 58' N., long. 56° 54' E., 156 fathoms. 

 A wonderful little form, which seems from the description to come nearest 

 to C. Yerreauxii, Fisch., from California. It is a discoidally depressed, deeply 

 umbilicate species, the last whorl furnished with three very prominently ridged 

 keels, acutely projecting, and terminating in a triangularly winged extension 

 of the upper part of the outer lip. Several examples, but by no means so 

 abundant as ft quadricarinatum, M. & S., which was in thousands at the above 

 locality. 



LIOTIA ROMALEA*, sp. n. (PI. A. fig. 8.) 



L. testa ovato-rotunda, parva, solida, anguste umbilicata ; anfractibus 5, ad 

 suturas excavatis, quorum duo apicales lasves, margaritacei, cseteris, antepe- 

 nultimouni-,penultimo bi-, ultimo tricarinato, undique longitudinaliter arete 

 costatis, costis crassis, interstitiis striis longitudinalibus arete prseditis, basim 

 versus, circa umbilicum, costis magnopere tumescentibus, spatio interstitiali 

 spiraliter profunde fenestrato ; umbilico profundo, perspective ; apertura 

 rotunda, intus albescente ; peristomate albo, multum incrassato, obscure 

 quinquangulari, continuo. 



Alt. 5, diam. 5 mm. 

 Hab. Persian Gulf, Sheikh Shuaib Island, 10 fathoms ; Maskat, 10-15 fathoms; 



also Gulf of Oman, lat. 23° 30' N., long. 57° 10' E„ at 10 fathoms. 



Several examples of a typical Liotia, coarser and smaller than L, echinacantha, 



but beautifully sculptured and with conspicuously thickened peristome, which 



is seen with the aid of a lens to be very obscurely five-angled. 



LIOTIA ECHINACANTHA, sp. n. (PI. A. fig, 9.) 



L. testa globosa, anguste sed profunde umbilicata, pallide straminea, robusta 

 anfractibus quatuor, quorum apicalis depressus, planatus, ceteris pul- 

 cherrime et arctissime sculpturatis, antepenultimo duobus, penultimo tribus, 

 ultimo sex squamarum ordinibus prsedito, squamis echinatis, spinarum instar, 

 cavis, anfractu ultimo (et penultimo) ordine superiore, squamis incurvis, 

 magis conspicuis, arctissime accincto, infra peripheriam, circa umbilicum, 

 tribus ordinibus multe minoribus ; apertura rotunda, intus margaritacea ; 

 peristomate crassiusculo, umbilico corneo, multispirali. 



Alt. 6, diam. 7'50. 

 Hab. Persian Gulf, Gulf of Oman, Maskat, 10-15 fathoms. 

 A very beautiful little shell, not very near any of the genus with which we 



are acquainted. The scaly spines are characteristic, being fluted, hollow, and 



* pix)fji.i'Kios ) robust. 

 12 



