5° 



THE CONCHOLOGIST. 



however, entirely nnd immediately they are 

 withdrawn from their native element into 

 the open air. Such are the British 

 RItodymcnia pahiiata (Grev ), and, above 

 all, Nilophyllum laa'raium (Grev.), Chondrus 

 crispiis (I.yngbye), and Cystoseira ericoides 

 (Agardh). It is possible that the Latirus 

 prismatici/s, and other species with irri- 

 descent epidermis, feed exclusively on Algre 

 possessing this peculiarity, and so a colour 

 resemblance has been given them for ])ur- 

 poses of protection. This seems not an 

 improbable theory." The eleven new species 

 described are as follows : —Zff//y//i- Eppi, L. 

 formosiflf, Peristernia //la/inop/iora, P. hilans, 

 P. cant/iariformis, P. cremnochio/ie, P. 

 Smithiana, P. retiarin, P. leucofkea, P. 

 Sell 11(7, P. In mens is. We cannot refrain 

 from protesting against this system — which 

 seems to be on the increase— of naming 

 shells, &c., after individuals or places. 

 Surely some leading characteristic feature in 

 the shell or animal would suggest a more 

 rational and scientific nomenclature. A cata- 

 logue of Latirus and its immediate allies, 

 and a plate of figures of the new species 

 and others, completes this interesting memoir, 

 which reflects great credit on both the 

 Society from whose proceedings it is reprinted 

 and the author. 



DR. SCHARFF'S FIGURES OF IRISH SLUGS. 



By. T. D. A. CocKEREi.L, F.Z.S. 



T HAVE just received the beautiful work on 

 1 Irish Slugs, by Dr. Scharfif, published in 

 the Trafisacfions of the Poyal Dublin Society. 

 On pi. Ivi., he figures a number of varieties, 

 but gives only the specific names. I have 

 tried to identify these, and the result is as 

 follows : — 



PLATE LVI. 



Fig. I. — Limax maximus form obscurus, 



Moq. 

 Fig. 2.— Limax maximus form vulgaris, 



Moq. 



Fig. 3.— Limax flavus form flavus (Mot].). 

 Fig. 4.— Limax marginatus var. decipiens 



(Ckll., 1S86). 

 Fig. 6.— Agriolimax agrestis var. griseus 



(Ckll., 1889). 

 Fig. 9.— Amalia gagates sub sp. plumbea 



var. rava (Wilms.). 

 Fig. 10.— Arion empiricorum var. rufus 



(" Linn."). 

 Fig. II.— Arion empiricorum var. fascia- 



tus (Ckll, 1889). 

 Fig. 12. — Arion empiricorum van fascia- 



tus (Ckll., 1889). 

 Fig. 15. — Arion empiricorum var. bicolor 



(Moq.). 



Fig. 16.— Arion empiricorum var. nov., 



allied to the Portugese var. boca- 



gei, Simroth. 

 Fig. 18.— Arion subfuscus var. succineus 



(BouilL). 

 Fig. 19.— Arion subfuscus var. aurantia- 



cus (Ckll., 1886). 

 Fig. 20.— Arion hortensis var. subfuscus 



(C. Pfr.). 

 Fig. 21.— Arion circumscriptus var, neus- 



triacus (Mabille). 

 Fig. 24. — Geomalacus maculosus var. 



allmani, Heynemann. 

 I follow Pollonera in writing A. enpiricorum, 

 but doubt whether our species is more than 

 subspecifically distinct at best from the 

 Linnean ater. Figures 11, 12, and 16 are 

 specially interesting as approaching Portugese 

 forms, the striped variety suggesting A. lusi- 

 1 aniens. Figures 18 and 21 are new to 

 the British Isles. I think I have Fig. 20 

 rightly named, but superficially it is not 

 unlike A. fnoJIerii, Poll., or Simroth's light 

 variety of A. pascaJianus. 



Institute (if Jamaica, Kingston, Jamaica, 

 October \%lh, 1891. 



