MILAX GAGATES. 145 



Var. rava Williams, Shell Coll. Handbook, 1888, p. 89. 



Limax gagates var. 7 Clarke, Ann. and Mag. N.H., Nov. 1843, pi. xii., ff. 18-20. 

 Avialia. gagates var. viaderensis Ckll., Ann. and Mag. N.H., 1891, p. 334. 

 Afiialia gagaies var. ascensionis (Lesson) Ckll., op. cit., p. 335. 

 Alitalia gagates var. ascensionis f. helenee Ckll., op. cit., p. 336. 

 Anialia gagates var. ascensiotiis f. trisiensis Ckll., op. cit., p. 336. 



Animal drab-coloured, slightly fuscons, the mantle often paler than the back. 



The sub-var. maderensis Ckll., sub-var. ascensionis Lesson, with the iovras helenm 

 and tristensis, are all apparently forms of the var. rava, but the three latter forms 

 have intimate relationship also with the var. plmnbea, and constitute a series of 

 connecting links between the vars. rava and plumbea. 



The sub-var. madepensis Ckll. is of an uniform dark-brown, including the foot; 

 mantle blackish and oval, keel not strong, and median-area of sole more than twice 

 as broad as either lateral zone. 



The sub-var. helense Ckll. is dull palish oohreous, with simple reticulate groov- 

 ings, the interstitial spaces being similarly but still more delicately sculptured; 

 back darkish purplish-grey, with a strong but not obviously paler keel extending 

 the whole length of the back ; neck bluish-grey above ; mantle purplish-grey, except 

 on the sides, below the sulcus, which are pale oohreous, rather sharply defined from 

 the dark part by the sulcus ; median-area of sole not quite twice as broad as either 

 lateral area. 



The sub-var. tpistensis Ckll. has the rugte rather strong, back and mantle 

 plumbeous, sole and sides of body yellowish. 



The sub-var. ascensloniS Lesson has a general resemblance to the two preceding 

 related sub- varieties. 



Channel Isles — Var. rava, Guernsey, numerous, Aug. 1891 ! B. Tomlin. 



Cornwall W. — Var. rava, garden, Truio, April 1886 ! J. H. James. 



Devon S. — Var. rava, .swarming in Mr. McMurdo's garden, Topsham, Aug. 

 1892, L. E. Adams. 



Hants S. — Var. rava, common at Christchurch, Jan. 1887 ! C. Ashford. 



Middlesex — Var. rava, garden, Hornsey, Oct. 1891 ! H. W. Kew. Crouch Hill, 

 Oct. 1891 ! G. K. Gude. 



Oxford — Var. rava, near Little Bourton (W. E. Collinge, Conch., 1891, p. 13). 



Monmouth — Var. rava, Shirenewton Hall, June 1886 ! E. J. Lowe. 



Worcester — Var. rava, garden, Stourport (Williams, Science Gossip, May 1886). 



Carnarvon — Var. rava, Conway Castle, Jan. 1888 ! L. E. Adams. 



Anglesey— Var. rava. Puffin Island, Aug. 1891 ! T. Shankland. 



Cheshire — Var. rava, nursery gardens. Sale, Feb. 189.3 ! and Ashton-on-Mersey, 

 Oct. 1892 ! C. Oldham. 



Lancashire Mid— Var. rava, Garstang, Sept. 1888 ! W. H. Heathcote. 



Edinburgh— Var. rava, Levenhall, plentiful, Aug. 1886 ! W.D.R. 



Antrim — Var. rava, Cushendun, May 1886 ! Rev. S. A. Brenan. Murlough Bay 

 Glen, June 1899, R. Welch. 



Down — Var. rava, in lily of the valley beds, Oakleigh, Ormeau Park, Belfast, 

 1897, A. W. Stelfox. Common in garden, Sydenham House, April 1898, and 

 Downpatrick Cathedral grounds, March 1898, R. Welch. 



Louth— Var. rava, Dundalk, Jan. 1904, C. Oldham. 



Dublin— Var. rava, Kingstown, May 1886 ! W. F. de Vismes Kane. White- 

 church, Oct. 1890, B. F. Scharff. 



Queen's Co. — Var. rava. La Bergerie, common (B. J. Clarke, op. cit., p. 339). 



Sligo Var. rava, Carrahubback, abundant under stones on low grassy banks, 



near the sea-shore, Oct. 1892 ! Miss Amy Warren. 



Mayo W — Var. rava, Ballina, Oct. 1890, R. F. Scharff. Slievemore village, 

 Sept. 1888 ! (J. G. Milne, J. of Conch., Oct. 1891). 



Madeira Sub-var. nucderensis Ckll., a specimen in the British Museum, labelled 



"Madeira, Mr. Mason" (T. D. A. Cockerell, op. cit., p. 334). 



Ascension— Sub-var. etscensionis Lesson (T. D. A. Cockerell, op. cit., p. 335). 



St Helena Sub-var. helenee Ckll., a specimen in the British Museum, labelled 



"St. Helena, J. C. Melliss" (T. D. A. Cockerell, op. cit., p. 336). 



Tristan d' A cunha— Sub-var. tristensis, a specimen in the British Museum, 

 labelled "Tristan d'Acunha, Challenger Collection" (T. D. A. Cockerell, op. cit., 



Tuan Fernandez — Sub-var. tfisfensis, six specimens in the British Museum, 

 labelled "Juan Fernandez, Challenger Collection" (T. D. A. Cockerell, op. cit., 

 p. 338). 



