72 TESTACEA ATLANTICA. 



JIahifaf Maderam; in graminosis editioribus prsecipue abun- 

 dans, sed ubique sat vulgaris. 



The European //. agrestis is tolerably common in most parts 

 of Madeira proper, abounding more especially in grassy moun- 

 tain pastures of a rather high altitude. I have taken it at the 

 Pico do Infante ; and whilst encamped with .Air. Lowe near the 

 Pico d'Arribentao, during April of 1855, it was in great profu- 

 sion at a place (in the direction of the Kibeira d'Escalas) called 

 the ' cova d' Antonio Caldeira,' about 2600 feet above the sea, 

 exhibiting two tolerably distinct states, which Mr. Lowe defined 

 as the ' a. major, pqUido-ci/rierea,' and the '/3. minor, ochraceo- 

 fusca; ' — the first of these (which was the rarer, and nearly an 

 inch in length) being larger and of a creamy pale ash-grey, 

 mottled and punctate with darker markings (agreeing exactly 

 with the common English L. agrestis) ; whilst the second 

 (which was excessively abundant, and about half an inch long), 

 was slender, of a warm pale bistre-brown, with the head, neck, 

 tentacles, and fore-half of the shield lighter and brighter, the 

 hinder half of the latter and the tail being gradually of a 

 darkish tint. 



The L. agrestis, which is extremely mucose and has its 

 shield subconcentricaliy striated (like the lines at the end of 

 one's fingers) may be instantly recognised from the L. gagates 

 by, inter alia, its ecarinate body, — which is rounded, or almost 

 flattened, towards the hinder edge of the shield, — the only trace 

 of a keel (and that merely in the ' status a,' as above enun- 

 ciated, for the ' status /3 '' is quite uncarinated) being at the 

 extreme tip. 1 



Pani. 2. TESTACELLID2E. 



Genus 3. TESTACELLA, Olivier. 

 Testacella Maugei. 

 Testacella Maugei, Fer., Tabl. Syst. 26 (1821) 



„ „ Lowe, Cambr. Phil. Sue. Trails, iv. 40 



(1831) 

 „ „ Id., Prop. Zool. Soc. Loncl. 163 (1854) 



„ „ Morel, Hist. Nat. cles Acor. 143 (1860) 



„ „ Paiva, Mon. Moll. Mad. 6 (1867) 



„ „ Mouss.,Faun. Mai. des Can. 11 (1872) 



„ „ Watson, Joum. de Conch. 221 (1876) 



1 Mr. Lowe, in reference to the fact that Dr. Albers did not appear to have 

 met with the present Limax while at Madeira, made a note about it to this 

 effect: — 'Most distinct in all its stages from every state, or variety, of the 

 L. gagates. Although not less common than the latter, from September to 

 May or June, Dr. Albers, searching little for himself, might well not meet 

 with it. It is only strange that he should have supposed that it could be a 

 mere form of the L. gagates. 



