ROEBUCK : ON DENBIGHSHIRE MOLLUSCA. 207 



shells I have only seen one species — Limncea peregra, which was 

 numerous in a new cattle trough near the summit. The 

 ' Morfa ' is immediately to the south of the Great Orme's 

 Head, separating it completely from the hills of the southern 

 mass. This ' Morfa ' (or marsh, as it is literally translated) is 

 level, and covers about four or five square miles. A great 

 part of the western portion of it is covered with bracken and 

 not conchologically productive, but the eastern portion is 

 under cultivation, and intersected with straight-cut drains and 

 hedges. A large area of this eastern portion is occupied by the 

 fashionable watering place of Llandudno, which stretches for 

 about a mile in length from where its older portion nestles 

 close under the shelter of the Great Orme. The drains and 

 ponds of the flat country are inhabited only by Limncea peregra, 

 save in one pond in Abbey-road, close under the S.W. escarp- 

 ment of the Great Orme, which yields Sphceriuin lacustre and 

 Physa hypnoru7n also. The damp roadside puddles of the 

 Morfa are inhabited by Succinea putris, while Helix nemoralis, 

 in great variety of colour and markings, swarms along the road- 

 sides in company with H. aspersa and If. virgata, and lesser 

 numbers of H. caperata. The short crisp turf which borders 

 Llandudno Bay from the end of the promenade to the foot of 

 the Little Orme's Head is alive with H. virgata and Bulimus 

 acutus, and they also occur on the summit valleys of the Little 

 Orme, to about 200 or 300 feet above the sea. 



The southern mass of hills is broken up into three or four 

 more or less prominent steep-sided eminences of rounded out- 

 line, such as the Little Orme's Head, Gloddaeth Mountain, 

 Pydew Mountain, and Deganwy Castle Hill, &c. Conchologi- 

 cally they reproduce the main features of the Great Orme's 

 Head, with the difference that the lower slopes of the Gloddaeth 

 and Pydew mountains are clothed with a luxuriant growth of 

 woodland, known as Gloddaeth and Bodscallan woods, thus 

 giving shelter for woodland and moisture-loving species of 

 mollusca. In this vicinity is a very old wall at Bodscallan, whose 



