On new Longicorn Goleoptera from Somali. 407 



tilaria, Valvulina, Polymoi-phina, and some of the Nodosa- 

 rince &c, though severally grouped under " generic " names*, 

 are plainly referable to their zoological type-forms, so the 

 Miliolidse and allied groups still hold their suzerainty over the 

 more or less differentiated forms, whether species, subspecies, 

 or varieties, elucidated of late by the careful diagnoses 

 elaborated by our esteemed fellow-workers in France. 



There is, of course, great difficulty in deciding the relative 

 value of differences among individuals (of all the groups) 

 showing often inconsiderable modifications or deviations 

 from the zoological type, whether due to idiosyncrasy of the 

 individual or to evolution among the many — for they may 

 have been caused by accidents of growth, or they may show 

 ontogenetic variation, due to progression, or even to deterio- 

 ration, of the special form. 



Although Foraminifera, like other organisms, should be 

 classified on true morphological characters, we all know it is 

 good that the differences of individual forms, and of limited 

 groups of such varieties, should be carefully noted and made 

 serviceable to collectors and systematists ; and the only 

 acceptable plan for the purpose is (as has often been said) to 

 apply the usual nomenclatorial terms, without regarding them 

 as of the same value as when applied to members of the groups 

 of higher animals. Keeping this in mind, we are glad to 

 use the results of the judicious and discriminative labours of 

 MM. Munier-Chalmas and C. Schlumberger, as in the case 

 of earlier rhizopodal workers, and to give full references to 

 their descriptions and figures whenever fit opportunities occur. 



LII. — On some new Longicorn Goleoptera obtained by Mr. Th. 

 Greenfield in Somali. By C. J. Gahan, M. A. 



A SMALL collection of Coleoptera made by Mr. Th. Greenfield 

 in Somali, and recently presented by him to the Trustees of 

 the British Museum, contains a good proportion of species 

 which had not previously been represented in the National 

 Collection. Amongst the Longicornia I find four species 

 which do not seem to have been yet described. The charac- 

 ters of these and of a new genus are given in the following- 

 paper. 



* Such as Articulina, Spirolina, Haplophragmium, Bigenerina, Spiro- 

 plecta, Gaudryina, Clavulina, Amphicoryne, Flabellina, Marginulina, 

 Dimorphina, Sagrina, &c. 



