SUPPLEMENT. 217 



Shetland, 60-80 f. F. Palermo (Seguenza and Benoit) ! E. 

 Loffoden I., 250 f. (Danielssen, /. Sars). 



P. 256. CERITHIUM METULA. Fair Isle (Moller) ! ; N. of 

 Hebr., 170 and 189 f. (C. and T.). E. Loffoden I., 300 f. 

 (Sars). 



P. 258. C.RETICTJLATUM. Orkneys (Thomas) ! F. Through- 

 out Great Britain and Europe. E. Madeira (Watson) ! 



P. 261. C. PERVERSUM. St. Magnus Bay ; Eair Isle (Mol- 

 ler)! F. Portrush (A. Bell)!; Christiania Cyprus ! Ex- 

 tremely variable in size ; both the large and small forms occur 

 in Sicily and Dalmatia. 



P. 264. 0. tuberculatum. Mr. Dodd found a small speci- 

 men at Herm ; and M. Cailliaud records a variety (C. Mediter- 

 raneum, Desh.) as living at Pornichet in the Loire-Inferieure. 



P. 266. CERITHIOPSIS TUBERCTJLARIS. Orkneys (Thomas) !; 

 N. of Hebr., 189 f. (C. and T.). P. Portrush (A. Bell)!; 

 Christiania Ehodes ! Dr. Tiberi found specimens of different 

 sizes living with Modiolaria marmorata in the tunic of Ascidia 

 mentula at Naples. This indicates a parasitic habit. Monstr. 

 Clarkii. Dalmatia (Brusina, as C. bilineata) ! 



P. 268. C. BARLEEI. The operculum has a very short 

 spire. Wexford coast, 40 f. (Walpole) ! E. Arcachon (La- 

 font) ! ; G. Naples (Tiberi)! ; Sicily (Stefanis) ! 



P. 269. C. PTJLCHELLA. Spire of the operculum small and 

 resembling a Cristellaria. Mathilda margaritula, Semper, a 

 tertiary fossil of Lapugy in Transylvania, may be this species. 



P. 271. C. METAXA. P. Pisa (Manzoni); Ehodes (Mus. 

 J. d. PI.) ! E. Dalmatia (Brusina, as C. acicula) ! 



P. 272. C. COSTULATA. N. of Hebr., 170 and 189 f. (C. 

 and T.). E. Loffoden L, 300 f. (Sars). Not my C. nivea, 

 which I have now ascertained to be a Cerithium ; Carpenter 

 and Thomson dredged a living specimen of it in 550 f. between 

 the Outer Hebrides and the Faroe Isles. 



P. 276. PURPTTRA LAPILLUS. N. of Hebr., 530 f., dead 

 (C. and T.). F. Bohuslan (Thuden) ; New England (Ham- 

 lin, /. Packard). E. Minorca (Eamis, /. Hidalgo). Yar. 

 wibricata. Hayle (Hockin). 



P. 279, 1. 9 from top, for " siliceous " r. " chitinous ". 



VOL. V. L 



