MUSEUM OF COMPARATIVE ZOOLOGY. 409 



Genus FISSURELLIDEA Orbignt. 



Fissurellidea limatula Reeve. 



Fissurella limatula Reeve, Conch. Icon. Fissurella, pi. xv. fig. 115, 1850. Sowerby, 

 Thes. Conch., pi. viii. fig. 204. 



Habitat. Off Havana (dead), in 80 frns., Sigsbee. Coast of North Carolina, 

 in 15-20 fms., U. S. Fish Commission. 



This shell appears to be the species figured by Reeve without habitat. It 

 is very variable in color, being often brown, reddish, or slaty and black. It 

 was found living on marine grass at low water near Key West, by Hemphill. 

 It recalls F. callomarginata Cpr. of the Californian coast, but is broader and 

 more evenly shaped, and brighter colored. The more prominent ribs are often 

 provided with fine vaulted scales. 



The following additional species of this family were dredged dead from deep 

 water, where they had been disgorged by fishes, or drifted by currents, etc., 

 as they are distinctly littoral forms. 



Glyphis barbadensis Gmelin. 



Fissurellidea fasciata Pfr. 



Fissurellidea (fragment) sp. indet. 



Fissurella minuta Lamarck. 



Fissurella cayennensis Lamarck. 



Suborder DOCOGLOSSA. 



The Docoglossate limpets of the littoral zone of the Antilles, most of which 

 are also common to South Florida and the Central American and Mexican 

 coast in suitable localities, all belong to the genus Acmcea as far as known. 

 I have never seen a single representative of the Patellidce from this region. 

 Perhaps future researches will reveal some. 



The positively determined shallow-water species are as follows, but they 

 have many synonyms: — 



Acmcea melanoleuca Gmelin (P. albicosta C. B. Ad. -+- P. leucopleura Lam. pars). 

 Acmcea jmnctulata Gmelin (P. puncturata Lam. -+- P. pustula Helb. non Lin. 



+ P. surinamensis Auct. non Gmelin, -+- P. cubaniana Orb., etc.). 

 Acmcea punctulata var. pulcherrima Guilding. 

 Acmcea Cancleana Orbigny (P. notata Gmelin, Chemnitz, Dillwyn, Lamarck, 



etc., not of Linne). 

 Acmcea onychina Gould (Rio, also Barbados). 

 Acmcea melanosticta Gmelin (Antilles). 



The last mentioned has been sent to me from several sources as Patella 

 antillarum Sowerby, but Philippi's figure of antillarum is more like a variety 

 of melanoleuca than anything else. I do not know on what authority the 

 name melanosticta rests. Gmelin's description certainly would not be suffi- 



