82 REPORT —1867. 



On the Moi-pliology of the Arthrojwda. By Anton Dohrn, Dr. Phil. Jena. 

 The author had studied the development of Pulcemon, Lithodes, Poi-tuntis, and 

 more especially Mysis and Cu7na. He considers the complex respiratory apparatus 

 of Cumn as a high degree of elahoration of the simple form met with in Zoea. The 

 mieropyle apparatus in the hack oiCuma and the Edriophthalma is nothing but the 

 remains of the dorsal spine of Zoea, or rather of the larval form of the cirripeds, 

 which he calls Archkoea, as he believes Zoea takes its origin from it. The larval 

 membrane of Cuma axiA Edriophthalma is nothing but the last remains of the carapace 

 of the Nauplius of the cirripeds. The trefoil-like appendages oiAzellus are the last 

 remains of the Zoea state, representing the carapace, the spines on the sides of the 

 carapace, and the respiratory apparatus of the Zoea. The two pairs of antenna} 

 and the mandibles of the Crustacea are homologous with the three pairs of extre- 

 mities of Nauplius. The plate and appendage which reach the top of the head in 

 the Cuma embryo develope into the carapace and branchial apparatus. The plate 

 in Cuma and Phryganea are identical. In Cuma it becomes the carapace, in Phry- 

 (janea the head-plate ; whilst the appendage which in Cuma forms the top of the 

 branchial apparatus, forms in Phryyanea the antennte. 



Amblystegium confervoides, a Moss new to Britain. By John Feaser, M.D. 



While visiting Dovedale, on the 29th of November 18G6, for the purpose of exa- 

 mining its mosses, the author was fortunate enough to find a small and in some re- 

 spects an insignificant moss, but which has never before been observed in the 

 British Isles. It has been submitted both to Mr. Wilson of Warrington and Pro- 

 fessor Schimper of Strasbm-g, who are quite agreed as to what the moss is, and who 

 are satisfied that this is the first time it has been recorded in this country. It has 

 previously been found on the Alps and other parts of Europe. 



The romantic dale of the Dove is on the confines of Derbyshire and Staffordshire ; 

 it consists of the Mountain Limestone, which rises on either side to a considerable 

 elevation. The new moss was picked up in that portion of it which belongs to 

 Staffordshire, growing in patches more or less extensive, not on the bark of trees, 

 nor on the solid rock, but on detached stones of small size in shady places.^ It has 

 not been found except in one place, and that over a small area and in small 

 quantity. It is to be hoped that it may be found in other parts of the limestone 

 in that "district, as well as in other parts of England. 



The moss itself is one of the smallest species. It has much affinity to Hypmim 

 incurvafum, differing chiefly in its smaller size, hair-like depressed branches, and in 

 the lax texture of the leaves, which are quite destitute of nerve. At first it was 

 supposed to be Amhhjdcyium subtile ; but this has a straight erect capsule, no cilia 

 to the inner ]5eristonie, and leaves faintly ner\ed. 



The following description of it was drawn up for the most part by Mr. Wilson : 

 — Amhlysteyium confervoides of Bruch and Schimper is monoecious, growing in 

 patches on ' stones aiid in shady places; stems creeping, very slender, subpinuate, 

 sparingly branched ; branches capilliform ; leaves scattered, secund, more or less 

 spreading, ovate - lanceolate, acuminate, entire, nerveless ; perichretial leaves 

 longer, erect ; capsule cernuous oblong, slightly incurved, pale brown, semipellu- 

 cid ; operculum convex, apiculate ; annulus small, deciduous ; inner peristome with 

 cilia ; outer peristome yellow, fruit-staUv one-third of an inch long. 



Specimens and drawings of this moss were exhibited. 



On the Destruction of Plantations at Drumlanriy by a species of Vole. 



By Dr. Gkieeson. 

 The ravages of one or more species oiArvicola or Vole in the plantations at Drum- 

 lanrig in Dumfriesshire have been for years increasing. As far as the author can 

 learu, such was not specially noticed until about the year 1852. Since then the de- 

 struction might be represented by high figures. It woidd seem that the Voles liave 

 migratory habits, at times appearing in vast numbers in plantations where they had 

 not beenpreviously noticed, and which they almost completely destroy. The destruc- 

 ticn is principally among the young oaks and ash. A ring of bark is gnawed from 

 the tree close to the root, wliere it is covered with grass. The efloct of this ring of 



