PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 337 
Vol. VI, No. 22. Washington, .€. Dec. 27, 1883. 
Hipponyx antiquatus L. 
Key West, between tides, under stones, not rare. Exactly like Cal- 
ifornian specimens, at least so far as the shell is concerned. 
Patella puncturata Lam. 
Key West, living on the reefs at low water; rare. A common West 
Indian species. 
Ischnochiton pectinatus Sby.* 
Key West, on rocks at low-water, abundant. 
Ischnochiton,multicostatus C. B. Adams. * 
Key West, with the last, but rare. I have not been able to compare 
either of these species with authentic types of the species to which they 
are here referred, but they are certainly [schnochitons and probably 
these species. Mr. Hemphill, whose experience and success in collect 
ing Chitons is well known to those interested in that group. calls at- 
tention in his notes to the fact that he found only these two species in 
the localities in Florida which he visited. Mr. Calkins reports Chiton 
piceus Gmelin, and Chetopleura apiculata Say, abundant in the Keys ; 
is this due to erroneous identifications (so frequent in this difficult 
group), or do the species have different times for approaching the 
shore? Melvill does not mention any Chitons. They are compar- 
atively rare in the West Indies. In the Blake Mollusca I have de- 
scribed a fine species, Hanleyia tropicalis, from one hundred and twen- 
ty-eight fathoms off Sand Key. 
LAMELLIBRANCHIATA. 
Pholas (Martesia) cuneiformis Say. 
Cedar Keys. 
Teredo ? megotara Hanley. 
Cedar Keys. This does not agree with the figures, but seems nearest 
to T. megotara. ‘The figures extant of Teredines seem particularly 
poor. 
Teredo (Lyrodus) chlorotica Gould. 
Cedar Keys. Nearly related to Gould’s species if not identical. 
Xylotrya fimbriata Jetireys, var. subzqualis. 
Cedar Keys. This differs from the type in having the anterior and 
posterior areas subequal in size. 
Solen americanus Gould (S. ensis of earlier American authors). 
Very young specimens were sent from Cedar Keys, where Mr. Hemp- 
hill obtained them on the mud flats. 
Tagelus gibbus Spengler. 
Abundant on the mud flats near the mouth of the Manatee River. 
Of extremely wide distribution. 
Proc. Nat. Mus. 83 
DP At. 
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