1 6 HABITS AND HABITAT. 



The parts so far issued of Volume VII. continue the Helicida. The genus 

 Helix is concluded in part 26, and a commencement made with the genus 

 Cochlostyla, Fer. The execution of the fifteen plates with each part is admirable. 

 In reply to a communication addressed to the Academy, we are informed that but 

 few complete copies of Series 2 remain, a fact to be noted. — W. E.C. 



CLASSIFICATION AND NOMENCLATURE. 



The Genera Hadra and Camaena (Nachr. Deutsch. Malak. Gesell., Nov. and 

 Dec. 1891). 

 Von Mollendorff writes on " Hadra and Camilla, " criticising the sub-divisions 

 given in Pilsbry's continuation of Tryon's Manual, and proposing the following 

 grouping : 



Gen. Hadra (Albers) 



Sect. I. Enhadra (Filsbry), type H. peliomphala, Pfr. 



,, 2. Thersites (Pfr.), ,, H. ruhniondiana, Pfr. 



,, 3. Hadra, s. str. ,, H. bipartita, Fer. 



,, 4. Spluvrospira, Morch. ,, H. Fi-aseri, Gray. 



,, 5. Xant/iomelon, \. Mart. ,, H. pomum, Pfr. 



Gen. Camtcna (Albers) 



Sect. 1. Camcrna, s. str. type H. cicatricosa, Mull. 



,, 2. Pkcenicobius, Morch ,, H. arata, Sowb. 



,, 3. Pseudobba, Mollf. ,, H mamilla, Fer. 



,, 4. Stylodonta, Cr. and Jan. ,, H. unidentata, Chem. 



[This separation of Pkcenicobius from Cochlostyla, where it has so long been 

 placed, and its recognition as a true Helix, appears perfectly justified. The section 

 which contains these very remarkable shells is peculiar to the islands of Mindoro, 

 Luban, Busuanga, and probably Calamian. It forms a culmination of the 

 remarkable Celebesian forms mamilla and papilla, a link between which and 

 Phccnicobius is furnished by Hidalgo's H. bintuanensis and probably by H. Ceres, 

 Pfr. The placing of Stylodonta (a group peculiar to the Seychelles) in such close 

 connection with Caimvna, seems very questionable]. 



New Chinese and Japanese Land Mollusca. (Nachr. Deutsch. Malak. 

 Gesell., Nov.— Dec, 1891). 

 Schmacher and Boettger continue their " New Materials for the characterisation 

 and geographical distribution of Chinese and Japanese Land Mollusca. " The 

 following are new : Clausi/ia (Hemipliudusa) uraniscoptyx, Tornatellina baningi, 

 Hell rina badia, Cyclophorns moellendorjfi. 



Three new Helices from New Guinea. (Nachr. Deutsch. Malak. Gesell., 

 Nov. — Dec, 1891). 

 Kobelt describes three new Helices horn New Guinea, H. (Sp/iarospira) Kohdci, 

 Dohrn. ms. , H. (Sp/uzrosp.) lepidophora, Dohrn. ms., H. (Chlontis) delphax, 

 Dohrn. ms. — all from Astrolabe Bay. — A.H.C. 



HABITS AND HABITAT. 



The Habitat of Montacuta ferruginosa (Jour. Conch., Vol. VI., No. 12, 

 1891.) 

 Mr. J. T. Marshall has been investigating the habits and habitat of this 

 mollusc. Previously it has been considered a rare form, owing to its true habitat 

 being unknown. In 1870 Mr. Marshall collected at Guernsey M. substriata from 

 off the spines of Spataugus purpureus, and then observed specimens of 

 M. ferruginosa in a similar position. In 1888 he again found both species on the 

 same species of echinoderm. The M. ferruginosa were invariably on the spines 

 around the oral aperture, while the M. substriata were at the anal region. 

 Spatangus purpureus does not seem to occur on the South Devon coast, but 



