THE NAUTILUS. 17 



4. Three examples having both a septum and a more or less com- 

 plete secondary growth. Smith states that of about one hundred 

 examples collected in the course of three years, only two were fully 

 mature. Of the specimens now in the collection, only one is appar- 

 ently mature, and that is much smaller than the dimensions given 

 by Smith for the fully mature shell, i. e., 5x3xl^ mm. As 

 shown by the figures (figs. 2, 5 and 8), it is somewhat defective along 

 the left margin. Allowing for the broken edge it measures 3|x2^xl 

 mm. In shape, however, it agrees substantially with Smith's de- 

 scription, and in the absence of a better, may be considered as 

 typical. 



The second specimen, if ever mature, has had the secondary 

 growth broken back on all sides nearly to the primary shell, so that 

 it is quite impossible to say what the original size or shape was. 



The third example is apparently the one referred to by Smith (p. 

 400) as having begun the secondary growth with a septum covering 

 " less than a quarter of the aperture." As shown by the figures 

 (figs. 1, 4 and 7), it has been broken along the posterior margin, but 

 enough remains to give a good idea of its original appearance. It 

 measures 2.75 x 2 x | mm. If this is the specimen mentioned by 

 Smith, and is "about two thirds " grown, the shell represented by 

 figs. 2, 5 and 8 is not far from being fully matured. The shape of 

 this specimen is quite different from that of the " typical " shell, 

 owing probably to the difference in the size of the septum. The re- 

 semblance in outline between it and the non-septate specimen figured 

 is quite strong, as shown by figures 4 and 6. 



This species is apparently quite distinct from both G. meekiana and 

 G. californica, being characterized by its larger and more widely-ex- 

 panded secondary growth. More material showing the mature form 

 is very desirable, and it is to be hoped that collectors resident on 

 Long Island will make its rediscovery a matter of special consid- 

 eration. 



MOLLUSCAN FAUNA OF MONTEREY BAY, CALIFORNIA. 



BY S. 3. BERRY. 



During the summer of 1906, the writer attended a six weeks' ses- 

 sion of the Marine Biological Laboratory of Stanford University, at 

 Pacific Grove, California. While there considerable attention was 



