lUZATLAN TJNIVAIVES 



Genus CHEMNITZIA, D'Orh. 



427 



Nat. Hist. Canar. 1^2,9.— Forbes 8f Rani. Br. Moll. vol. iii. 



p. .— Woodw. Man. Moll. p. 126. 

 Turbonilla, Bisso, Nat. Hist. Eur. Mer. vol. iv. p. 224, 1826.— 



PJiil. Handh. Conch, p. 193.—^. ^ A. Ad. Gen. vol. i. p. 230. 

 Parthenia, Loioe, Ann. Mag. Nat. Sist. vol. vi. p. 511, 1841. 

 Pyrgiscus, Fliil. Arch.f. Nat. vol. i. p. 50, 1841. 

 Pyramis + Jaminea, Brown, Brit. Conch. 

 Amoura, Midi. 

 Orthostelis, Arad. 8f Magg. Cat. Beg. p. 189, ? 1844. 



Species TVPiciE. Anfractibus planaiis. 



Section A. Without spiral sculptv/re. 

 (a.) Bibs interrupted at the periphery. 



518. Chemnitzia ? Panamensis, C. B. Ad. 



Pan. Shells, no. 227, pp. 168, 312. 



Tablet 1989 contains a dead specimen which appears suf- 

 ficiently like the type in Mr. Cuming's Collection. It has 5 

 whirls, the apex being deficient both in this and in the type. 

 The species is rather broad, with very flat whirls, stout, rather 

 slanting ribs, and very deeply cut grooves as far as the peri- 

 phery. It measures long. "075, lat. '025. 



JSab. — Panama ; 11 sp. in the sand on the reef, between high 

 water and half tide levels ; C. B. Adams. — PMazatlan ; 1 sp. 

 off" Chama ; ZIpool Col. 



519. Chemnitzia C-B-Adausii, n. s. 



Ch. t. gracili, alba, elongatd ; vertice nucleoso anfr. iii. 

 prominentibus, declivi, marginibus spirce rectis superante ; 

 anfr. ii. prope apicem rotundatis ; deinde vii. planatis, suturd 

 impressd ; liris circiter xviii. rectis, solidis, obtusis, ad peri- 

 pheriam subito obsoletis ; basi subrotundatd ; labro tenui ; 

 cohunclla tenui, vix intorta. 



Shell intermediate between Ch. aculeus and Ch. Panamensis, 

 with aU the whirls except those next the apex flattened. The 

 apex is very large, with 3 tumid whirls, set rather slanting on 

 the axis. It is named in remembrance of Prof. Adams of 

 Amherst, U. S. whose early death has deprived science of one 



