122 T11E NAUTILUS. 



Oliva porphyria, Adams found only a broken fragment. I hunted 

 in vain for even that. I doubt if Panama is now its natural habitat, 

 as the shell was scarce in 1850 and is not lound there now. Adams 

 took 1500 Nassa panamensis on the reef that juts out from the old 

 sea wall. Not a single Nassa is to be found there now. Of Nassa 

 hifeostoma, Adams took 330 near the old sea wall. They are not to 

 be found there now, they having migrated two miles across the bay 

 where a bushel could be taken at one tide. Adams found fourteen 

 species of Nassa, I found four. Adams found incredible numbers of 

 Nerita, two species, took 3200 specimens. Of these only 400 were 

 Nerita scabricosta, (he only species to be found in considerable num- 

 bers now on the high-tide rocks. Adams found 29 species of Col- 

 umbella, 3000 specimens ! ! Four good specimens of C. harpae- 

 formis. brought up by hermit crabs, and half a dozen other species, 

 beach worn, rewarded persistent search. 



Monoceros cinguJatum. Adams found only 75, most of them 

 young. Of these one may get a thousand adults in one tide but 

 not at Panama, at Taboga Island. Adams took 3900 specimens of 

 Litorina, 12 species. Now, only one species to be found in consid- 

 erable numbers. Adams found 110 specimens of Ricinula reeviana, 

 I found one. 



Conus, then and now : brunneus, 4 ; gladiator, 70 1 ; ma~ 

 hogani, 17 0; nux, 2 12; princeps, 8 4; purptiroscens, 12 1; 

 regularis, 1 ; nms, 25. I was fortunate enough to find two 

 specimens of Conus panniculus Lam. at Taboga, one alive, and both 

 splendid specimens. Has this or any other of the Texti been re- 

 corded from the Panama Province? A fine specimen of Contti 

 fergusoni Sby. was found, a species not recorded in the Conch. 

 Iconica, and considered doubtful by Tryon. This specimen, after 

 removal of the olive-green, persistent epidermis, shows perpendicular 

 stripes of delicate yellow alternating with lavender, from rounded 

 shoulder to base where the colors merge into pale ashy brown, colu- 

 mella and interior violaceous white. All other specimens that I 

 have seen are dead white. The figure in Tryon's manual is not C. 

 fergusoni either in form or color. Fergusoni has the rounded 

 shoulder and heavy form of Conus betulinus or C. glaums, depressed 

 accumulated spire, whorls eight, rounded and canaliculate. 



Purpura seems to be more plentiful than whem Adams was there. 

 He found 8 species, 600 specimens. Two miles from Panama one 



