340 JNl. Lestiboudois on the Vessels of the Latex, 



the fineness and closeness of their striae. And though specimens 

 of y8, subvar. 1, normalis, occur occasionally quite as obese, yet 

 they are generally far more slender, being always, moreover, 

 distinguished from the present shell by their uniform dull pale- 

 grey cinereous colour without lustre, stronger, more distinct, 

 and remote longitudinal striae, more acute and drawn-out spire, 

 with the volutions slightly more convex, and suture more im- 

 pressed, having also at least one more volution. Thus, as a 

 variety of C. deltostoma, its proper place would be between sub- 

 var. 1 and subvar. 2 of var. /3 ; but, if admitted as a species, it 

 must stand between C. deltostoma {/3, subvar. 2) and C. exigua. 

 la the former case, I would propose the following fresh arrange- 

 ment of the varieties or subvarieties, instead of that given in 

 " Catal. Moll. Mad.," in the ' Proc. Zool. Soc' 1854, part 22. 

 p. 215 :— 



C. deltostoma, Lowe. 

 * Striis longitudinalibus remotiusculis distinctis. 

 a. raricosta, subvarr. 1 (= C Lowei, Alb.), 2, /. c. p. 215. 

 /3. crebristriata, subvar. 1, normalis, I. c. p. 216. 



** Striis longitudinalibus confertis tenuissimis. 



7. obesiuscula=C. obesiuscula supra. 



8. depauperata = C. deltostoma, /3, subvar. 2, depauperata, I. c. 



p. 216. 



I have received also from the Baron de Paiva several examples 

 of a minute Madeiran Vitrina, with only two volutions, collected 

 between S*" Anna and S. Jorge, in April last, which, from its 

 globose shape and aspect, seemed at first sight possibly distinct ; 

 but, on close and careful examination, I find it to be merely the 

 very young (pullus) of V. Lamarckii, Fer., with the very minute, 

 puncticulate, spiral striae which characterize the young of that 

 species and of V. media, and which are also visible on the nuclei 

 or two primary volutions of most adult specimens of those two 

 species, though wanting in V. Teneriffae, Q. et G. 



Lea Rectory, Oct. 15, 1863. 



XXXIV. — Third Communication on the Vasa Propria, Laticiferous 

 Vessels, S^c, of Plants. By M. T. Lestiboudois*. 



It has been shown in the two preceding communications that 

 the coloured juices of plants are contained in reservoirs extremely 

 diversified in structure, and that these are at times anastomosing 

 vessels constituting a network, at others straight and rigid 

 tubes or utricles, either in rows or collected into irregular 

 * Translated by Dr. Arlidge from the ' Comptes Rendus' for July, 1 863. 



