56 THE NAUTlLUb. 



been the most striking birds, with many that we could not place at 

 all. An occasional alligator or crocodile can be seen, but we are 

 surprised at the scarcity of this beast. During every minute of day- 

 light there has been something beautiful and interesting to look at, 

 and the cool nights are as delightful as the days, which are not 

 excessively warm. We are impressed with the fact that few people 

 realize that the round trip can be made from New York to Manaos 

 for $160, with stops of several days at Par^ and Manaos, in really 

 fine vessels. Otherwise it seems probable that many people would 

 take the run. The ship's surgeon is a noted German professor, who 

 takes this method of getting a splendid vacation. 



P. S. Manaos, July 25, 1911. Have just landed and got settled. 

 We learn that we shall be delayed a week waiting the return of the 

 Madeira & Mamore Co.'s steamer and manager, but we are assured 

 that we shall be sent up to the Madeira river, as we had hoped, free 

 of cost for the trip and living expenses while there. Also we are 

 told that there are land shells about Manaos, so the time will not 

 hang heavily on our hands. 



A NEW VARIETAL FORM OF SCALA PRETIOSA LINN. 



BY MAXWELL SMITH. 



ScALA PRETIOSA (Linn.), n. var. multivaricifera. 



This form differs from the type in the broader shell and greater 

 number of varices. Comparing an average shell with the variety, 

 the number of varces is as follows : 



Typical form. Var. multivaricifera. 



Embryonic whorl, Embryonic whorl. 



Embryonic whorl (?), Embryonic whorl (?), 



Third whorl, 8 varices, Third whorl, 8 varices, 



Fourth whorl, 8 varices, Fourth whorl, 8 varices. 



Fifth whorl, 8 varices. Fifth whorl, 8 varices, 



Sixth whorl, 8 varices. Sixth whorl, 9 varices, 



Seventh whorl, 8 varices. Seventh whorl, 11 varices, 



Body whorl, 10 varices. Body whorl, 15 varices. 



Around a portion of the body and upper whorl of the variety 



