92 EEY. E. BOOa WATSON ON THE 



On the base of G. Barleei, coBsiderably within. the edge, there 

 is a flat, rather weak, untubercled or obsoletely tubercled 

 spiral thread, within which the subcorneal radiatingly striated 

 base is not depressed ; a very feeble scar of the old canal encom- 

 passes the base of the pillar. In G. fayalensis the circumbasal 

 thread is stronger and more nearly tubercled ; and the base 

 within this thread is slightly depressed ; the scar of the old canal 

 is scarcely traceable. 



(5) C. PATALENSis, Wats. (= C. corona, Wats. MS., see 

 Monterosato, Journ. de Conch. 1875, p. 41, No. 94), Journal 

 Linnemi Society, Zool. vol. xv. p, 125. 



Has an elongately conical apex of four rather short convex 

 whorls, of which the extreme tip is rounded and smooth, and the 

 other three are scored with distinct curved longitudinal ribs. 

 The base, which is a little impressed and strongly radiatingly 

 striate, has a single strong circumbasal thread which is fretted, 

 but hardly tubercled. 



Hob. Madeira, 0-50 fathoms ( Watson) ; Fayal, Azores, 450 to 

 500 fathoms QGIiallenger^ JExpedition, St. 75); coast of Portugal 

 and SjDain down to a depth of 220 fathoms at St. 13 (' Porcupine ' 

 Expedition) . 



(6) C. TiAEA, Watson. (See Monterosato, Journ. de Conch. 

 1874, p. 274, No. 168.) 



Has a blunt apex consisting of three whorls, of which the 

 rounded tip is smooth and prominent ; the two following whorls 

 are strongly longitudinally ribbed ; they are all convex, a,nd are 

 parted by a deep suture. The base of the shell is square, and has 

 two small circumbasal threads, both lying well within the peri- 

 pliery ; they are parted by a very fine furrow ; the outer one is 

 feebly tubercled ; the depressed basal flat between the inner one 

 and the pillar is minutely but sharply radiatingly striated. 



Hah. Madeira, 0-50 fms. (Watson), and Palermo, Sicily (Mon- 

 terosato). 



(7) C. Claeeii, Forh. Sf Hani. Brit. Moll. vol. iii. p. 368, 

 pi. ciii. fig. 6. 



Has an embryonic apex of 2^ whorls, which are duU and 

 roughish. The tip is brown, mamillary, and large. The next 

 whorl is rather larger than that which follows, and is bicari- 

 nated by two remote strongish threads which gradually approxi- 

 mate. There are only two tubercled spiral threads on the regular 



