246 Proceedings of the Royal Physical Society. 
Sigularia Brardw, Brongt., is very rare in Britain, and I 
am much indebted to Mr John Ward and Mr F. Barke for 
the specimens described in this paper. 
Upper CoAL-MEASURES. 
Locality—Railway cutting, Florence Colliery, Longton, 
North Staffordshire (the Potteries Coal Field). 
Horizon — About 300 yards above Bassey Mine Ironstone, 
which is about 280 yards above the uppermost bed of the 
Middle Coal-Measures. Collected by Mr F. Barke. Reg. 
No. 818. 
MIDDLE CoAL-MEASURES. 
Locality.—Cope’s Marl Pit, Longton, North Staffordshire 
(the Potteries Coal Field). 
Horizon.—Above the Peacock Coal. Collected by Mr John 
Ward. Reg. No. 817. 
EXPLANATION OF PLATE. 
Fig. 1. Sigillaria Brardii, Brongt., natural size, from railway cutting, 
Florence Colliery, Longton, North Staffordshire. 
Fig, la. Leaf-scar and cushion from portion representing typical form of 
Sigillaria Brardii; x 3. 
Fig. 1b. Leaf-scar from portion representing the Stgillaria rhomboidea, 
Brongt.; x 3. 
Fig. 1c. Leaf-scar from portion representing the Sigiliaria denudata, 
Gopp.; x 3. 
Fig. 2. Sigillaria Brardii, Brongt., natural size, from Cope’s Marl Pit, 
Longton, North Staffordshire, 
Fig. 2a, Leaf-scar and cushion; x 2, 
Fig. 2b, Portion of stem showing cone-scars; x 2. 
XVIUL A Preliminary Notice of a Parasitic Copepod from the 
vas deferens of Nephrops norvegicus. By J. STUART 
THomson, Esq., Demonstrator of Zoology, New School 
of Medicine, Edinburgh. 
(Read 15th April 1896.) 
During the past session, while demonstrating the internal 
organs of Nephrops norvegicus, I noticed on the walls of the 
vas deferens a very conspicuous abnormality. This consisted 
of a swollen mass or hernia of a light burnt-sienna colour, 
