56 THE NAUTILUS. 



Planaxis nucleus Wood. King's Keys. Plentiful. 



Pachycheilus corvinus Morel. Tungla river, near Quiquina, Nic. 

 A common shell in all the rivers beyond the influence of the salt 

 water. Dr. Pilsbry identified this shell for me, but Mr. Ancey, who 

 received some of my shells from Mr. Shackleford, of Clitheroe, Eng., 

 wrote me that my shells '' differ from the true P. corvinus from Gua- 

 temala, named by the author himself." It was my intention to col- 

 lect more of these shells, in order to supply my friends, but when- 

 ever I made preparation for a shell-collecting trip, some duty turned 

 up and prevented me. At my request an Indian brought me about 

 100 specimens, and at first sight of them my heart rejoiced, but when 

 I discovered that he had perforated the body-whorl of each, I rejected 

 them in the hope of some day having opportunity to collect for 

 myself. That time never came. The Indian's idea of shell collect- 

 ing was limited to eating the inside and using the shells as beads ! 

 What an opportunity that would have been for lady shell-collectors! 



Ampullaria reflexa Swn. Wounta. Found on the beach after 

 heavy floods, just south of the river mouth at that place. Where 

 they came from I do not know, presumably from " up the river." 

 One had a perfect operculum, although a dead shell. 



Nerita peleronta L. 



Nerita versicolor Lam. 



Both these forms from King's Keys and Man of War Keys. Much 

 larger and more beautiful than those I have from the West Indies. 

 A common article of food among the Indians, in turtle-spearing 

 season, when they spend much time on the keys. 



Nerita tessellata Gmel. Man of War Keys. Abundant. 



Nerita praecognita C. B. Ads. Same locality. One specimen. 



Nerita fulgurans Gmel. Walpa Siksa. On the rocks. Large. 

 Not plentiful. 



Neritina lineata Lam. 



Neritina lineata var. reticulata C. & J. Common in Bluefields 

 lagoon and in all the other lagoons and rivers as far up as the brack- 

 ish water extends. The variety reticulata is by far the commoner of 

 the two, only one in about forty being lineata. Reticulata averages 

 larger, too. These shells are found on submerged mangrove roots 

 and logs, or on the muddy bottom itself. The " tingnis," or chan- 

 nels, peculiar to the Mosquito Coast are its favorite haunts. It 

 never ventures far from the water. 



