74 THE NAUTILUS. 



tensis covered the leaves and branches of these bushes, the varieties 

 being the yellow and five banded. Oil the ground Pyramidula 

 alternata, Polygyra albolabris and Sncdnea obliqua were abundant. 

 We obtained the famous wine colored variety of P. a/bolnbrif, and 

 among the specimens discovered a set handed with fine lines, like 

 P. multilineata. Time was precious and we collected expedi- 

 iously as the tide was coming in. We escaped from the island with 

 a slight ducking from the surf, but happy are the results. On Green 

 island a few specimens of H. liortrnxi* were found, among them 

 two full grown forms, which had for some reason started to grow 

 again ; extending from the finished lip was a continuation of the outer 

 whorl, but of a dirty cream color and rough with ridges. On one 

 of the islands Frank discovered the home of the albino P. <ilteriiiitn, 

 a valuable prize. Shore collecting gave us a beautiful series of the 

 various varieties of Pii.rpura lapillus, and some of the specimens were 

 the largest we have seen. We also found Bucrlit inn, Skeneaplanorbis, 

 Turtoiiia minuta, Rissoa aculeus, Lacmni rlin-in, and the common 

 shore varieties. Considerable time was given to dredging in depths 

 from seven to twenty-five fathoms. One summer is far too short to 

 exhaust this region, but many localities were dredged with good 

 results. A dozen to fifteen new forms were added to the cabinet, 

 and at least fifty duplicate sets, to represent the Bay, found places in 

 the collection. Five species of chitons were found, including Ainiciiln 

 Emersonii; a few fine specimens of Peeten magellanicus were dredged, 

 among them one that had received an injury and in repairing had 

 turned the edges of both valves upward so that they grew at right 

 angles to the natural plane. The interesting genus Bela revealed a 

 half dozen or more species, harpularin being the most abundant. 

 Brachiopods were found occasionally, and sponges, shrimp, echino- 

 derms and other invertebrates were abundant, but with much regret 

 at not having the means to care for them they were returned to the 

 sea. A list of results would contain all of the common forms. The 

 more rare species included the genera Thracia, Astarte, Nncula, 

 Modiolaria, Crenella, Cylichna, Margarita, Odostomia, Lunatia, 

 Velutina, Astyris and others. 



Since the above article was written I have read with much interest 

 the article on " Helix alternata" by Mr. Ormsby. I do not wish to 

 take anything from his statements, but to add one or two concerning 

 that species. The islands of Casco Bay are good to stand a man on 

 his head, figuratively if not literally, for he meets with circumstances 



