K0.1312. SYNOPSIS OF THE VENERID.E— BALL. 373 



Shell small, with a rosy flush internally and a yellow brown perios- 

 tracum over a white disk. This species was identified dou))tt'ully with 

 Reeve's Venus inhda in the BJal'e report, but I am now^ contident that 

 it is distinct. The sculpture resembles that of C strigillina, but is 

 less dense and prominent. 



L CYCLINELLA TENUIS Recluz, 1852. 



Sao Paulo and Rio de Janeiro. Brazil. Oruadeloupe. West Indies, 

 Recluz; and northward through the West Indies to Cedar Keys, West 

 Florida. 



This was erroneously identified with C. Jcroyeri Philippi, in Poulsen's 

 Cataloo-ue. It is not the Artemis tenuis of Sowerhy. of slightly later 

 date than A. tenuis Recluz; it is smaller and more delicate than the 

 West American species. Lucinopsis gundlaehl Dunker, in Arango, 

 1878, is svnonymous, and probably the unfigured C. fragilis Romer, 

 1860, from St. Thomas. 



CHIONE (CHIONE) CANCELLATA Linnaeus, 1767. 



From Cape Fear, North Carolina, southward to Brazil, including 

 Bermuda, the West Indies, and the adjacent coasts, in shallow water. 



This very abundant and variable shell has naturally received many 

 names, and by the early naturalists was confounded with other cancel- 

 lated species of Linnams and others. It is the Venus dysem and 

 ziczac of various authors, but not of Linnffius; it is V. cingenda Dillwyn, 

 1817; V elevata (and probably F. inxquaMs) Say, 1822; V. lamellata 

 Deshayes, 1853, in synonymy; and Cardiuni Jyicolor Marty n, 1781. It 

 is the Venus lamarckii of Beau, but not of Gray, the V. ziczac of 

 Morch and Krebs, but not of Linnceus; the V. maculosa of Graelin, 1792. 



CHIONE (CHIONE) SUBROSTRATA Lamarck, 1818. 



Miami, Florida, and the Keys, and south to the Abrolhos Islands, off 

 the Brazilian coast, and Rio Janeiro, in shallow water; also on the 

 shores of the Pacific at Mazatlan, etc. 



This is also the Venus heaui Recluz, 1852; and Venus portvsiana 

 Orbigny, 1816. It is the V. crenifera of Carpenter in the Mazatlan 

 Catalogue, and Sowerby, 1835; probably also Venus lunularis Philippi, 

 1811 (as of Lamarck), but not of Lamarck, 1818. 



CHIONE (CHIONE) MAZYCKII Dall, 1902. 



Cape Hatteras, North Carolina, and southward to the vicinity of 

 Cape San Rociue, Brazil, in 15 to 127 fathoms. 



The bright rose color of the interior and its quadrate form are the 

 most striking characteristics of this small but pretty species. It was 

 cited in Bulletin 37, United States National Museum, as Venus 

 lamarckii Gray, the young of which it nmch res(Mnbles, but the latter 

 is an Indo-Chinese species, and has a different hinge. 



