179 
On some of the Rarer or Unprscripep Species of Dtaro- 
MAcEm. Part I. By T. Brieurwe tt, F.L:S. 
Iv is my purpose to give in this and some following papers 
descriptions of some of the many undescribed or unfigured 
species of Diatomaceze, chiefly marie, which still are found 
in our cabinets ; illustrated by Mr. Tuffen West’s excellent 
figures, they will, I trust, be acceptable and useful to algo- 
logists. 
1. Kunotia eruca.—vValve slightly arcuate, from three to 
five or six flexures or undulations above and below; extre- 
mities slightly produced, striated. Varies in length from ‘0018, 
with three flexures, to ‘004 with five flexures. Strize 20 in 
001. Amphicampa eruca (Ehr., ‘ Mikr.,’ Pl. xxxi, F. vii). 
Fresh-water lagoon, near Melbourne, New South Wales ; 
Mackie. (Pl. IX, fig. 1, and fig. 1a.) 
2. Cocconeis coronata, n. sp.—Valve oval, slightly con- 
stricted at the extremities, stout marginal band, with from 
thirty to thirty-two transverse canaliculi; disc striated, 
moniliform ; strie 15 m -001. Valves 002 long by -0014 
broad. Shell cleanings. West Indies. (Pl. IX, fig. 2.) 
3. Cocconeis fimbriatus, n. sp.—Oval, margin fringed with 
a band indented internally, disc striated, with lines of dotted 
strie. Corsican Alge. (PI. IX, fig. 3.) 
4. Campylodiscus striatus, Ehrenb.—Disc in the middle 
part smooth, with a double series of parallel canaliculi on 
each side, eleven in the smaller to twenty in the larger spe- 
cimens. Kitzing, Species ‘ Alg.’ p. 33, No. 11. Vera Cruz. 
(Pl. IX, fig. 4.) 
5. Surirella limosa, Bailey.—V. broadly ovate, acuminate, 
faintly punctato-striate. Canaliculi seventy-five to eighty, 
short and indistinct, not reaching more than 1-6th across the 
valve, leaving a large blank centre. Length ‘01 by -045 in 
breadth. Strize very indistinct, 22 in -O01. 
Professor Bailey, MS.? Thisspecies was, Mr. Tuffen West 
thinks, sent to Professor Smith, with this name. 
New Zealand, Mackie. Mud, Hudson River, New York, 
