TURNER: DESMID NOTES. 
Micrasterias truncata (Corda) Bréb. The _ peculiar 
pseudo-spinous form, described in 1840 by Corda as 
Cosmarium quadragies-cuspidata, has turned up from the last 
habitat, in an old slide of Webb’s mounting. The apparent 
spines are probably only altered mucus. Fig. x 250. 
Penium lewisii n.sp. This little form is a near congener 
of P. cylindrus (Ehr.) Bréb., but differs in its fine granulations, 
its dilated ends, and its colourless membrane. Long. and 
lat. 46, 11, and 62, ton. Snowdon, J.H.L. 
Docidium hutchinsonii n.sp. Straight ; semi-cells faintly 
sinuate, ends truncate with broadly rounded angles, basal 
portion gently dilated, suture not prosilient. Surface covered 
with small papille, 2°5-3 » long., those at ends 1°7-2 » long. 
Frond long. 245-280 ; lat. bas. 21-26, apic. 17-19°5 #. Strensall 
Common, W.B. Fj x 400. amed in honour of the 
Rev. T. N Baa a brilliant scientist and right worthy 
English gentleman. 
Closterium intermedium var. sculptum Racib. forma 
eboracense n.f. A very fine form, with dilated apices, from 
saga This may prove to be a distinct species. Fig. 
Cylindrocystis roseola n.sp. This name I have bestowed 
upon a little form with a membrane yellowish-pink or bright — 
pink in colour; the sides are gently incurved; membrane 
thickened at apices. Long. and lat. 46x19; 48x20; 
Spondylosium monile n.sp. A iy form, in front view 
_ biglobate, in side view gently contracted in se middle. — 
Measure (about) long. 7, lat. 4, cr. 3 p. 
Spondylosi um armillatum n. sp. A still smaller plant, — 
biscocttioiity centre gently incavate in front view; side view 
compressed. Measure (about) long. 6, lat. 3°7, cr 2°5 pe ] 
This and No. 19 are from Trelleck, comm. J.H.L. - 
Euastrum exile n. sp. Minute, with incurved ‘sides, 
expanded and routided basal angles, and rounded apices, 
_ incisions curvato-cuneate. ‘Sinus narrow. Side view lance- 
olate, apices rounded. © swag +; lat. 8, isth. 3 cre re = 
S apawies: F BL 
las - var. ie c n um sin ) of “7 ° 's upt ulis 
West (Alg. Lak )3 
_ The following are 2 noteworthy. “From: Lyn Padara oo 
cambric 
