5 
ce of the striated bands. In this respect it closely resembles the species 
to be described. 
—St. Mary’s river, Ga., salt marsh and in tidal mud. Wharf at Fer- 
a, Florida, tidal deposit. Pier at St. Augustine, Florida. Rare. 
Surirella F e bigerii, n.sp. F. V. As in last described. V. Ellipti- 
ar ovate, sometimes broadly sphenoid, ale inconspicuous, canaliculi 
a ated arcuate band situated relatively to the valves as in the preceding. 
‘Interspaces of the canaliculi strongly punctate. Central portion similar in 
outline to that of 8. pulchra, elevated above the surface of the valve and 
of ly striate. Length of valve 006a-010. PII. f. 2. 
a The striking similarity i in outline and number of canaliculi of this to the 
last. described species, together with the correspondence in both of the arcuate 
‘striated bands, at first led me to regard these forms as merely different aspects 
of the same frustule (valve) ; but after careful examination of several detached 
valves, by reversing the slides and other manipulations, I am led to con- 
clude that they belong to different species. Both are very striking and showy 
forms, more particularly the last, whose strongly marked intercostal puncta, and 
the generally ornate character of its valve, make it a singularly beautiful mi- 
croscopic object. S. Febigeriiis pretty generally, but not abundantly, dis- 
tributed along the Atlantic coast. The first specimens were detected by me 
0 years ago in mud dredged from New London Harbor, sent me by Mr. Fe- 
iy , of Wilmington, Del., in honor of which careful and industrious observer 
apy os named the species. 
; a _ Hab.—New London Harbor mud, St. Mary river, mud from oysters. Wharf 
hee | at Femandina and more recently at Cape May salt marshes, by Mr. Febiger. 
ch rom its wide range of locality it will doubtless prove a common form on the 
coast. 
4. Surirellaovata, Kitz, Sporangial? Pl. I. f. 3. This variety is not un- 
mmon in salt marshes along the Jersey coast, although specimens of the 
Re “Size fgured are very rare. A comparison with the typical species will show 
A considerable points of difference, but these become less in frustules which ap- 
3 imate to the normal size, although never altogether lost. It is perhaps 
entitled to rank as a variety of S. ovata. Length of valve -0009 a -0050. 
5. Cymatopleura marina, n.sp. F. V. Linear, slightly inflated, ends more 
or less truncate. V. Lanceolate, very acute, undulations from 6 to 13. Sur- 
ay of valve irregularly punctate. Length of valve 0007 a ‘002 PILI. f. 4. 
_ This inconspicuous little form, although not yet found in quantity, occurs at 
various points along Long Island Sound. As far as is known to the writer it 
is the only marine species. 
. Hab.—On algz at New London. New Haven and Black Rock Harbors. East 
__ river (Mr. Febiger), in mud. 
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6, Amphiprora conserta, n.sp. Frustules adherent in curved bands of- 
ten to the number of 12 or more. Frustule straight, membranaceous. F. V. 
Linear oblong, slightly dilated. Keel or ala central or subcentral, constricted, 
costate, spathulate at extremities. V. Lanceolate or lanceolate with produced 
extremities. PIL f£8.5 
oe. the great variation in size, outline and general configuration of the frustules 
of this species, together with the fact of their being so imperfectly silicious that 
Be ea oiling i in weak acid either distorts or entirely destroys the specimen, ren- 
As rs it not improbable that this may be an early developmental form, although 
2 what known species, if any, would be difficult to say. A smooth and very 
_ diaphanous variety of A. paludosa occurs in the same gathering. 
The ‘‘plates’’ alluded to by the late Prof. Gregory (Marine Diatomacee of 
AF Clyde, ) as characterizing A. lepidoptera, and others of the genus, are 
_ strongly marked in this species, and serve asa point of attachment between the 
_ various frustules. Arising from the surface of the valve at a short distance 
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