BIBLIOGRAPHY. 183 



denttens, H. badia, H. Josephince, H. nigrescens, Amphibnlin a pa- 

 tula, Bulinms laticindtis, and Helicifm episiilia, excepting the 

 last all these species are found everywhere above 300 or 400 feet 

 of elevation." 



An analysis of Mr. Brown's observations show that Stenogyra 

 octona and Heliciiia antiUaruni, Sow., are common everywhere, 

 Helix badia and H. dentiens are most plentiful below 800 feet and 

 Bulinms exiles below 1000 Succinea approxitnans and S. rubescens 

 are not found below 300 feet. 



Tornatellina aiitilla7-uin is found sparingly at about 500 feet. 



Helicina platycheila, and H. fasciaia are not found lower 

 than 800 feet. 



Above 1000 feet Helix Josephincc, H. nigrescens, and Aniphi- 

 bulina tigrina are found. 



Above 1500 feet CyclopJiouis Schrammi, and Helicina rJio- 

 dostonia appear w^hile it is not until 2000 feet are reached that 

 Helix Baitdoni, Bulimus virginalis, B. multifasciata, B. NiclioUsii 

 and Amphibitlima patula are met with. 



Mr. Brown affirms the power of A. patula to completely 

 retract itself within its shell, and hazards the conjecture that 

 A. pardilina Guppy, may be referable to A. tigrina I esuer, and 

 that from the description Cycloius anieiiiystiniis Guppy, is not a 

 Cyclotus but a Cydophorus, and probably C. Schraninii Shuttl. 



Littorina litorea (L.) on the American coast. — By A. 



F. Gray. — Science News, April, 15 th, 1879. 



This species was first noticed in Halifax, Nova Scotia, by 

 Willis. It is common in the Bay of Chaleur, and is probably to 

 be found in all suitable localities on the coast of New England as 

 far as Long Island Sound. 



The specimens at Beverley, Massachusetts, are large and fine- 



