UMBRACULUM. 179 



Dr. George Forbes in 1758, and published in the Philosophical 

 Transactions for that year. These figures are so poor that their 

 reproduction here would be useless ; it is enough to say that they 

 show the generic characters fairly well. The mantle edge and border 

 of foot seem to be very ragged. No specimens seem to have occurred 

 to later naturalists. It may be the same as the preceding species ; 

 and if so, the latter should have priority, being well described and 

 figured, while this has never been described and the figures are 

 totally inadequate. Morch is in error in stating that Dr. Forbes 

 called this animal a " sea-batt." 



Bermuda (Dr. Geo. Forbes). 



Fish . . . of the shell kind, Dr. GEORGE FORBES, in Philos. 

 Trans., 1, 1758, p. 859, pi. 35 (1759). Operculatum Bermudense 

 MORCH, Malak. Bl., xxii, p. 179 (based wholly on the figures of 

 Forbes). 



U. MEDITERRANEUM Lamarck. PL 69, figs. 44, 45, 4ti, 47, 48, 49. 



Mantle whitish, becoming orange-tinted at the edges, which bear 

 flat, triangular filaments. Foot orange colored above and below, 

 the upper surface densely tubercular, tubercles unequal, each whit- 

 ish at the summit ; tubercular upper surface covered with a brown, 

 mucilaginous epidermis. Length 12-13, width 9-10 cm. ; some- 

 times as large as 19 by 14cm. 



Shell oblong, extremely depressed, whitish under a thin yellowish 

 cuticle ; apex considerably posterior and to the left, conically pro- 

 jecting and recurved like a Capulus, toward the posterior and left 

 margins. Margins conspicuously undulated; disk with distinct 

 though low and wide radial waves, and some linear grooves ; and 

 with concentric growth-strise or wrinkles. Interior pale yellow or 

 white toward the periphery and on muscle-scar, with the space within 

 the muscle-impression and a ring outside of it rich brown. 



Length 5'2 ; breadth 3*7, alt. '5 cm. 



Length 7-2-7-5, breadth 61-6-3 cm. 



Entire Mediterranean and Adriatic Seas; from the ^Egean to 

 Spain, but rather local ; Atlantic at Cape Verde Is. (' Talisman ' and 

 * Challenger '); ? St. Helena (Smith). Laminarian zone and deeper. 

 Pliocene of Italy ; pleistocene of Sicily and Rhodes. 



Umbrella mediterranea LAM., An. s. Vert., vi, p. 343 ; edit. DESH., 

 vii, p. 574. PHIL., Enum. Moll. Sicil., i, p. 113, pi. 7, f. 11. 

 DELESSERT, Rec. de Coq., pi. 23, f. 12. FORBES, Rep. JSg. In- 



