sc7/-:.vc'/':-(,(Kss//'. 



'47' 



1 1 Ml., (!ilirallar, (Iranadu, Scliilal, aixl ntlicr 

 places in Spain, rurliiuil, and Nurlli Africa. I. 1\'., 

 acfdiiling 111 latitiide. 



I..\KVA (L^;. H. K., pi. \'., lit;. 5), greenish urcy with 

 lilnck (Inrsal lines, and oranyc lateral spots, dursal 

 priijcclicins nranfje with l>lack spines. ( )n .-In's/ii/oi/iia 

 pi:itoioi'hia. VI., etc. 



1. at). r<i«/(7;(/v' lleydr. (iroiind culoiir nf a rioli 

 iichreoiis yellow. 1 1 ah., .Andalusia, I'orlujjal (Selidial), 

 North .Xfrica. 



7. T. meiesicaste 111. 1..;. l;. i;., p. 14, pi. 

 IIL.fiK. 4. 



.Smaller than the average /. iiimiiui. (Iroiind 

 colour pale straw-yellow, black markinj^s not so 

 strong, red spots larger in proportion hut paler, hind 

 marginal dent.itions much shallower than in T. 

 nniiiiia, especially on h.w., m.ukings of u.s. paler 

 and less strongly marked. 



II\li.. I'rovence and I-anguedoc, freinienling rocky 



gorges and hill sidei. .\vignoii, Ninies, Aries, llyere>, 

 Cannes, C.'as(|ueiraniie, I Jigne, etc. I\. \I. 



I.AKVA, on Arislolothia fiistoh.liitt. \1., \ II. 

 Lighter than' that of T. riiiiiiiia. 



II. &\\.hotioralii,MA\. I.g. B. K., p. 14, pi. III., tig. 5. 

 Size of the smallest specimens of '!', Hiedi'siiaslf, 

 diflfers from it in having the red spots immensely 

 enlarged so as to occupy the chief area of the wings. 

 The f.w. have three large costal blotches of red 

 narrowly edged with black and one near in. niarg. 

 The h.w. miy be de*crib;d as red, with a pale yellow 

 p.»lch in the di.scoidal cell and a marginal band of 

 light yellow with a black indented pattern. In fre.sh 

 specimens the red is a fine rose colour. IIaji. This 

 beautiful and rare form may be found at Digiie in 

 r icky situations, where Aiislolochia grows, Montaigne 

 de St. Vincent, la Collelte, the right bank of the 

 Bleone, etc. V. e., VI. 



{ To he coiitiiiut-il.) 



AR.M.A ILM 



ol- lll'.LKOIl) 



AND 



\F.\V SIX ridX.S OF IM.Kt 

 liv (.. K. Grut;, I'.Z.S. 



t Continued from />. •;-.) 



.\M).SI11-.LJ..S 



iT)l'^•I. 



'l"'IIE genus Pleclopylis w.ts established by Mr. 

 Benson in the " Annals and Magazine of 

 Natural History" (3), v., (i860), p. 244, and in the 

 preceding volume of the .same publication (3), iv. , 

 (1859), p. 95, he described the external characters of 

 the animal of /'. achatina. Mr. .Stoliczka. however, 

 was the first to examine some species anatomically 

 (Journ. Asiat. Soc. Bengal, 1871, p. 217), the forms 

 investigated by him being /'. a<Aaliiia, P. cydaspis, 

 /'. pinacis, and P. iiiar^oiiip/ialiis. He states that on 

 the whole the form of the body closely resembles that 

 of Claiisilia, and that a comparison of the interior 

 organisation of the two genera also indicates their close 

 relation. On comparing the jaw of Pla/opylis with 

 that of Clatisilia, he found both similar in structuie, 

 but the shape different and the transverse sulcation 

 only indicated in the latter genus. Much greater, he 

 continues, is the similarity of the Pkclopylis jaw with 

 that of Cyliiidrclla, with the exception that the 

 median projection is wanting in the Cylindnlla jaw. 

 The arrangement of the teeth of P. achaliiia and /'. 

 lydaspis he also found to agree with that of 

 Cyliniirel/a in the very small size of the centre looth. 

 but this wasnoi found to be a constant chanicur. In 

 /'. piiiaiis the centre tooth was larger and more of a 

 shape similar to that of the lateral teeth, which, how- 

 ever, in all the species he found to retain distinctly 

 the helicf)id character. 



The true systematic position of Pl,\lapylis still 

 seems uncertain. Mr. I'ilsbry doubtfully places it in 

 the family I lelicidae — between the groups Macroogona 

 and Teleophallogona (Manual of ("onch. ix.. Index to 

 the Helicidae, 1S95, p. 124). He includes two 

 Chinese groitps of uncertain afiinities, Truumatophora 



and Stegodeia, each containing one species, but as 

 nothing is known of their anatomy, and as, moreover, 

 ihey are devoid of the armature characteristic of 

 PIft/opy/h, I consider it expedient, for the present, to 

 exclude them. 



The shells of /Vf<7o/>)'//y are characterised by a more 

 or less depressed discoid form, with a flat or conical 

 spire and a large open umbilicus (narrow in the section 

 Sykcsia), the upper surface is usually .sculptured with 

 spiral lines, and the immature .shells are hirsute. The 

 aperture is .semi-circular or lunate, the peristome 

 somewhat expanded and generally thickened, its ends 

 usually united by an elevated ridge on the parietal 

 callus, which has often an entering fold. The arma- 

 ture consists of a vertical or transverse plate or plates 

 with accessory horizontal or obli(|ue folds on the 

 parietal wall : and transverse, horizontal or oblique 

 folds and denticles on the palatal wall. " When the 

 animal retracts into its shell, the pa.ssage through the 

 folds is generally found to be filled up with mucous 

 secretion, but the body itself mostly retracts one-half 

 of a whorl further inward.s. During hibernation the 

 aperture is besides closed with the usual calcareous 

 lamina, as in the other Hclnidae." (.Stoliczka, Journ. 

 .\siat. Soc. Bengal, 1S71, p. 21S). 



Mr. Benson noted that Plcilopylis a<lialina was 

 ovo-viviparous, and this was found to be the case with 

 all the species exainined by Mr. Stoliczka. One 

 specimen of /'. ,ychispis he found to contain three 

 well-developed embryos, each consisting of three 

 convolutions, regularly coiled in and enclosed in a 

 thin soft sac of calcareous granules, loosely joined 

 together. • I have also observed this fact in a specimen 

 of /'. lissoc/ilamys in Mr. Fulton's posse.ssion. 



