330 



PROCEEDINGS OF THE ACADEMY OF 



[1897. 



Trophon inornatus n. sp. 



Form as in T. lacinatus or somewhat more obese ; surface with- 

 out lamelke or spiral cords, smooth ex- 

 cept for growth-Hues. Specimens meas- 

 ure : 



Alt. 50, diam. 34 mm. 



Alt. 85 mm. 



CalyptR/F.a cf. mamillaris Brod. In- 

 ternal casts show no features incom- 

 patible with the recent C. mamillaris 

 of the west coast of South America. 



TURRITELLA INNOTABrLIS 11. sp. 



Shell long-conic, of about a dozen 

 slowly increasing whorls, which are 

 but slightly convex, but become de- 

 cidedly so below, the latter two or 

 three being well rounded. Sculpture 



on the lower whorls of five rounded 

 Trophon inornatus. i 1 i • i j i 



and subequal spiral cords separated 



by intervals of about the same width, traversed by one to three 

 (generally two) sharp threads. Earlier whorls have three primary 

 spirals parted by intervals bearing a single strong thread, and still 

 earlier the threads disappear from the intervals. 



Internal casts show well rounded whorls, the last just mentionably 

 flattened above the periphery, faintly angular at the junction of the 

 outer with the basal regions, the latter less convex but hardly flat- 

 tened. 



Length 31, greatest diameter about 12 mm. (from largest mould). 



Described from external moulds and internal casts, which alone 



are preserved in the rather hard limestone, which contains, besides 



numerous Turritellas, the remains of Cardium and Pinna f, and 



some included pebbles. 



A fragmentary mould of the basal volution of a somewhat larger 

 specimen thau the type shows the basal sculpture of numerous un- 

 equal and quite low cords, with some radial growth-wrinkles. 



The general figure is that of the Chilian T. cingulata Sowb., but 

 the details of sculpture differ. 



Cardium sp. undet. One very imperfect" valve of a species prob- 

 ably resembling muricatum or consors. 

 Pecten actinodes Sowerby. 

 Ostrtea ferarresi Orb. Larger than d'Orbigny's types, the larg- 



est measuring 12 - 5 cm 



long, 



10 - 5 wide. There is also less cren- 



ulation of the valve edges than the type shows. 



Ostr^ea n. sp.? A rather thin, straight-beaked oyster, not corre- 

 sponding well with any of the described species. One specimen. 



Pinna (?) Mere fragments in a refractory matrix. 



Magellania venosa Solander. Abundant. 

 There were also moulds of crab or lobster chela 1 . 



