NATURAL SCIENCES OP PHILADELPHIA. 475 



Aspergillum, (partim,) Savigny, Expl. Egypt. Moll. 



Guerin, Iconog. du Regne Anim. 



rhilippi, Enum. Moll. Sicil. i. p. 2, 1836 ; ii. p. 2, 1844. 

 Catlow, Conch. Nomeno. p. 1, 1845. 

 Riippell, Reise Nord Afric. 

 Jay, Catalogue, p. 8, 4th ed. 1850. 

 Woodward, Manual, pt. 2, p. 327, 1854. 

 Gray, Figs. Moll. Animals, v. 1857. 

 " Zool. Proc. p. 311, 1858. 



Description. Shell small, oval, equivalve, equilateral, imbedded in the wall 

 of the tube, and visible externally. 



Tube elongated, attenuated and open above, swelling, and closed below by 

 a convex diaphragm, with numerous margined perforations and a narrow 

 central fissure ; the circumference ornamented with one or more fringes of 

 tubuli. The upper or siphonal end of the tube plain. 



Surface of the tube wavy, depressed around the small pair of open valves. 



Inhabiting tropical countries, and living buried in sand or mud at low water 

 mark. 



Subgenus Warnea, Gray. 1858. 



Warnea, Gray, Zool. Proc. p. 309, 1858. 



H. and A. Adams, Genera, ii. p. 649, 1858. 

 The siphonal end of the tube fringed with from one to several rows of ruffles. 



6. Genus Penicillus, Gray, 1858, (not Bruguiere.) 

 Penicillus, Gray, Zool. Proc. 312, 1858. 



H. and A. Adams, Genera, ii. p. 649, 1858. 

 Aspergillum (partim) of authors. 



Description. The valves not surrounded by wavy depressions on the surface 

 of the tube. Disk surrounded by a single fringe of tubuli. 



Subgenus Clepsydra, Gray, 1858, (not Meuschen or Schumacher.) 

 Clepsydra, Gray, Zool. Proc. p. 312, 1858. 



H. and A. Adams, Genera, ii. p. 649, 1858. 

 Fringe of the disk consisting of two or three series of tubes. 



7. Genus Fcegia, Gray. 1840. 

 Foegia, Gray, Syn. Brit. Mus. 1840. 



Zool. Proc. p. 313, 1858. 

 H. and A. Adams, Genera, ii. p. 649, 1858. 

 Aspergillum (partim) of authors. 



Description. Valves not surrounded by wavy depressions ; covered more or 

 less by a sunken tubercle in front. Disk of the tube fringed. 



Subgenus Arytene, Gray, 1858, (not Oken or Megerle.) 

 Arytene, Gray, Zool. Proc. p. 313, 1858. 



H. & A. Adams, Genera, ii. 650, 1858. 

 Disk of the tube not fringed. 



8. Genus Hpmpheeyia, Gray. 1858. 



Humphreyia, Gray, Zool. Proc. London, p. 316, 1858, and Ann. and Mag. N. H. 

 3d ser. ii. p. 16, 1858. 



H. and A. Adams, Genera, ii. p. 650, 1858. 

 Brechites, (Foegia,) H. and A. Adams, Genera, ii. p. 339, 1856. 

 Aspergillum, A. Adams, Zool. Soc. Proc. p. 91, 1852. 



Reeve, Monog. Asp. Conch. Iconica, I860. 



1861.] 



