164 PROCEEDINGS OF THE MALACOLOGICAL SOCIEXr. 



mb.—Ver&ian Gulf, Muskat, 7-30 fathoms. 



This Mitra, of a warm chestnut colour, plain in form, belongs to the 

 same group of the genus as the West American M. caliginosa, Reeve, 

 mmira, Swains., Ida, Mel v., etc. There is likewise some affinity to 

 M. picta, Reeve. It was very uncommon in the above locality, and it 

 affords me much, pleasure to suggest for it the name of its discoverer, 

 Mr. Fi^derick W. Townsend. 



Pleurotoma. (Oltgotoma) PATRICIA, n.sp. PI. X, Fig. 15. 



PI. testa oblongo-fusiformi, alba, solidula, anfractibus 9, quorum 

 apicales 2 parvi, apice ipso acuminato, huic duobus vel tribus pi-oximis 

 tumidis, longitudinaliter costulatis, costulis prominulis, albis, margari- 

 taceis, nitidulis, cseteris anfractibus apud suturas, simul ac apud 

 medium, arctissime carinatis, carinis interdum irregularibus, superficie 

 longitudinaliter incurvistriata, ultimo anfractu supra medium carinato, 

 dein usque ad basim 8-10 conspicue spiraliter lirato, liris laevibus, 

 nitidulis, superficie interstitiali arete striata, apertura oblonga, labro 

 tenui, sinu lato sed non profundo, canali brevi. Long. 5, lat. 2 mm. 



Ten or twelve examples of a very beautiful, acutely spirally carinate 

 little Pleurotoma, the third and fourth whorls being curiously swollen 

 and conspicuously ribbed, the lower whorls acutely keeled, the body- 

 whorl, below the carination, many-lirate. It is evidently of the same 

 alliance as P. violaceus, Hinds, P. makemonos, Jouss., and P. Pouloensis, 

 Jouss., all from the Persian Gulf region, and I have likewise compared 

 it with description and figure of two unique and obscure species of 

 the latter author, viz., P. Clevei and Bellardi, Jouss. These are both 

 evidently very nearly allied both to each other and to our species, 

 whicb differs, however, not only as regards the tumid upper 

 whorls, as above mentioned, but likewise in size, being only half the 

 dimensions of the other species mentioned. Some affinity likewise 

 exists with P. fiisca, Hombr. & Jacq. ( = gemmata. Hinds), also found 

 in the same dredging in abundance, but this species is also larger, and 

 conspicuously monilifonn. P. tiara, Watson,' is also a near congener. 

 This is a New World deep-sea form. Brillia (or ? Manffilia) subsida, 

 Dall,^ from the West Indies, has also many points in common. 



Pleurotoma (Surcula) halictria,^ n.sp. PI. X, Pig. 16. 



P. testa fusiformi, tenui, sordide alba, subhyalina, anfractibus 9, 

 quorum 1^- apicales, globulosi, laeves, vitrei, apice ipso fere immerso, 

 caeteris ad suturas maxime impressis, nitidis, fere laevibus, ad medium 

 fortiter angulatis, longitudinaliter obliqui-costatis, costis nitidis, 

 crassiusciilis, supra, juxta suturas fere evanidis, simul ac anfi'actu 

 ultimo infra peripheriam versus basim, numero circa 15, ultimo et 

 penultimo infra spiraliter liratis, liris obscuris, inconspicuis ; apertura 

 oblonga, infra contracta, labro tenuissimo, sinu rotundo, lato, sed non 



1 Rep. Challenger Exped., vol. xv, p. 347, pi. xxi, fig. 7. 



2 Bull. Mus. Comp. Zool. Harvard, xviii, p. 118, pi. xii, fig 

 •* aAy, Kvpia, a mistress of the sea. 



