Mr. C. Mereschkowsky on Calijornian Diatoms. 511 
puncta themselves, the more so as they are larger than these 
latter. ‘The deepness of the septa and their parallelism below 
the puncta, as well as the distinct stria at the lower part of 
the frustule, contribute to make out of this species a very 
peculiar one. It has some relation only to LZ. profunde- 
septata, Mer., from the Mediterranean. 
162. Licmophora montereyana, Mer. (PI. V. fig. 6.) Mon- 
terey, very rare. [M.]| 
Valve narrow, linear in its upper half, abruptly attenuated 
in the middle, becoming again linear and very narrow in the 
lower quarter ; superior apex broadly rounded, inferior in- 
flated. Pseudoraphe invisible; striw very fine, about 23 or 
more in 0°01 mm. Septa deep (0°0175 mm.). Length 
0-119 mm., breadth of the valve 6 0U8 mm. 
The valve of this species has a form similar to that of 
L. remuloides, Mer., from the Black Sea, but it is a very 
distinct species, the septa being deep and the lower apex in- 
flated. It differs from ZL. grandis by the indefinite pseudo- 
raphe, which is very distinct in the latter ; the valve is also 
different. It has no close relation to any other species. 
163. Licmophora pacifica, Mer. (PI. V. figs. 4, 5.) San 
Pedro, not rare. [M.] 
Valve broad, cuneate, ovoid in small individuals, sometimes 
slightly attenuated towards the summit, gradually tapering 
from the summit, which is broadly rounded, towards the 
narrow and subacute inferior apex ; margins. straight. 
Pseudoraphe and striz distinct, the latter about 11-12 in 
0-01 mm. Girdle-face broadly cuneate, with upper angles 
rounded, walls thick, inferior apex broad. Septa compara- 
tively deep (average 0°0053 mm.), moderately arcuate ; 
septal puncta round, very distinct. Endochrome granular. 
Sessiliform. Length 0-028-0046 mm., breadth of the 
girdle-face 0°028-0°036 mm., breadth of the valve 0-0085- 
0:01 mm. 
This species has a certain resemblance to ZL. Lyngbyet, to 
which it seems to be allied; it differs by the valves being 
sometimes ovoid, by the septa, which are not so deep, and 
the absence of stypes. The valves of larger specimens 
resemble somewhat those of L. capensis, Grun., but the septa 
are much deeper than in the latter. 
164. Licmophora paradoxa, var. San Pedro,common. [M.] 
This is not the type species, as represented by a form 
which is extremely abundant in Villefranche (Mediterranean) ; 
