THE NAUTILUS. 



VOL. XXVI. NOVEMBER, 1912. No. 7 



NOTES ON MAINE MOLLUSCA. 



BY REV. HENRY W. WINKLEY. 



For the purpose of making a more careful examination of the 

 warm-water colonies in Maine, the writer spent two weeks at Wis- 

 casset and the same time at Orr's Island in Casco Bay. General 

 collecting at Wiscasset revealed the same species that I found on 

 former visits. A careful search in sheltered places revealed several 

 colonies of Odostomia trifida and bisuturalis, especially large and 

 abundant at Edgecouib. A drive of five miles and work in a 

 drenching rain at Sheepscote Bridge gave one or two specimens of 

 Odostomia bisuturalis var. ovilensis t Modiolus demissus var. plicatulns 

 and Ostrea virginiana. Unfortunately the refuse from a saw-mill 

 has nearly exterminated life at the type locality for ovilensis. Ten 

 miles east of Wiscasset, at Newcastle and Damariscatta, I had only 

 one low tide, but I found Modiolus demissus var. plicatulus, C'repidu/a 

 convexa, llyanassa obsoleta, Haminea solitaria, Urosalpinx cinereus, 

 Astyris lunata and P. (Syrnold) fusca, the last two new to Maine, I 

 believe. Odostomias have been found here by Mr. Wentworth, but 

 I didn't have time to visit the locality where he found them. 



At Orr's Island I found two more colonies of Astyris Zunata, a 

 few Odostomia bisuturalis; other forms of interest were Gingula acu- 

 leits, Skenea planorbis of a light color, Retusa pertenuis and youldii, 

 Bela bicarinata var. violacea (one specimen at low tide) and Mysella 

 planulata, with of course the more common forms. I found only one 

 land shell, Zonitoides arborea. 



