152 Dr. H. Woodicanl — I'rilohites fi-oni 



Fig. \h shows the flattened out thoracico-abdominal segments 

 and a part of the pygidium seen from below. The most anterior 

 segments are seen in the profile view, where they unite with the 

 head-shield (Fig. la) ; the others in Fig. 16. About ten or eleven 

 free segments can be counted altogether. The ends of the pleurae 

 are recurved and rounded. A part of the pygidium is exposed, but 

 the rest is buried in the matrix. There is a trace of a single row 

 of three or four tubercles upon the axis of some of the free thoracic 

 segments. The body-segments are 58 mm. broad by 51 mm. long. 



No. 2 specimen (see PI. V, Fig. 2) consists of a pygidium 

 accompanied by five or six displaced thoracic segments. The 

 pygidium is much flattened. It measures 52 mm. in breadth by 

 36 mm. in length. The axis is composed of about ten or eleven 

 coalesced segments, and is 14 mm. broad at the proximal end (where 

 it united with the free body segments), diminishing to 6 mm. near 

 the blunted free border, which is quite flattened out by pressure. 

 Indications of about six coalesced pleurae mark the lateral portion 

 of the pygidium ; the axis and pleurae are sparsely ornamented by 

 a single row of small tubercles on each segment. The general 

 rounded form of the pygidium is marred by the extreme com pi-ession 

 to which it has been subjected. 



On No. 6 (marked doubtfully as Ph. lati/rons ? ) are two badly- 

 preserved specimens of Trilobites, each showing the head and body 

 rings on the edges of the cleavage-planes (which are stronger than 

 those of the original bedding) ; both specimens are stained red with 

 peroxide of iron. Except in general resemblance, they are too 

 obscure for accurate determination. Locality as before stated, Cant 

 Hill, St. Minver. 



No. 9 exhibits parts of several obscure organisms, preserved 

 on the surface of a small slab, some of which appear to be 

 crinoidal, but one is the eye of a Trilobite, and may be referred 

 to Ph. lati/rons. This species is recorded from the Lower 

 Devonian, Hope and Barton, South Devon ; near Liskeard and 

 Totnes in slates with Pleitrodictyiim prohlematicnm. Middle 

 Devonian, Newton Bushell ; Upper Devonian, Barnstaple, Pilton, 

 Yealm Bridge, Launceston. Mr. Howard Fox's specimens are 

 labelled from Cant Hill, St. Minver, on the northern banks of the 

 Camel Estuary. 



2. Phacops gkanulatus, Miinster. (Plate V, Figs. 3, 4.) 



Cahjinene granulata, Miinster, 1842: Beitrage, Heft 5, t. v, fig. 3. 



Calymene granidata, Phillips, 1841 : Pal. Foss., fig. 248 (excl. figs, m, n, o, p). 



Phacops (jranulatus, Salter, 1864 : Mou. Pal. Soc, pt. i, p. 18, pi. i, figs. 1-4. 



This species is recorded by Salter from the Upper Devonian of 

 Petherwin, Cornwall. Although so small (PI. V, Fig. 3) it is the 

 best preserved and most interesting of Mr. Fox's specimens. It 

 consists of an intaglio and relievo of a small Trilobite (represented 

 twice the natural size in our Plate), measuring 24 mm. long 

 by 12 mm. broad (originally broader, but compressed by slaty 

 cleavage), and resting on the edges of the cleavage planes and 



