THE NADTILUS. 131 



gahi were not given instead of copies of the unsatisiactory drawings 

 of d'Orbigny. (Plates 20-21). 



Tiie new species described are Modiolus arciformis, AUgena 

 cokeri, Diplodonta (^Felanielld) artemidis, Xylotrya dryas (an inter- 

 esting form found burrowing in tlie living mangroves), Bulimidus 

 eokerianus, and Megatebennus cokeri. Acmaea orbignyi Dall is a new 

 name for A. scutum Orb. 1841 (not Esch (1833), and tbe commonly 

 used terms Anomia lampe Gray, Concholepas peruvianus Lam., and 

 Crepidula unguiformis Lam. must give way to A. peruviana Orb., 

 C. concholepas Brug. and G. crepidula Linn, respectively. 



The nomenclature of the faunal list presents the usual divergencies 

 from that in common use which are already familiar to those who 

 have read Dr. Ball's " Albatross " Report ' or his notable memoir 

 on the Oregon Miocene, ^ but there are still one or two points which 

 seem difficult to understand, namely the retention of the family 

 *' Aplysiidce" after the rejection of Aplysia for Tethys : the adop- 

 tion of the family name Turritidcz^ but not EpitoniidcB; of Bvllariidm 

 and Alectrionidce but not Arckitectonicidos. 



Murex elenensis Dall is a new name tor M. plicatus Sowerby 1840 

 (non Gmelin 1791), Thais peruensis Dall replaces Purpura peru- 

 viana Eydoux and Souleyet 1852 (not Blainville, 1832), Architec- 

 tonica (= Solarium) nanum (Kocii) Pliilippi, 1853 (not Grateloup, 

 1838) becomes A. kochii Dall, Fissurella aspera Sowerl)y 1834 (not 

 Eschscholtz, 1833) becomes Fissuridea asperior Dall, and Chiton 

 bipunctattis Sowerby 1832 (not Fisher. 1808) is changed to Tonicella 

 (^Mopaliella) stigmata Dall. Among the Pelecypoda, Fectuncvlus 

 minor Orbigny 1846 (not Lea 1833) bt^conn'S Glycymeris chemnitzii 

 Dall, and Donax aricana Dall replaces D. radiatus Valenciennes, 

 1838 (not Gmelin 1791). 



Another interesting point which may be observed in this connec- 

 tion with some propriety is that most writers on the mollusca of our 

 Southeastern and Gulf States seem to have overlooked the fact that 

 the Siphonaria lineolata of Orbigny, 1853 is preoccupied by Sowerby 

 1835. That name should therefore be restricted to the Chilian 



> Bull. Mus. Comp. Zool. xliii, No. 6, Oct., 1908. 

 2 U. S. Geol. Surv. Prof. Pap., No. 59, 1909. 



'The correct spelling is Turridae as H. & A. Adams have shown. (Gen. 

 Rec. Moll. II, p. 614, 1858). 



