BY K. P. KALLMANN. 269 



'rhalassodendrou viminalis{5i, Echinochalina intermedial \\t\g. 



p.87) 



Plectispa elegans{5i, p. 90) EchinocJathria arborea Ldf. 



Plect'ispa ar6or(5rt{54,p.89; 55, CJatJivia multipes, sp.n.(18). 



p,212) 



Plectispa inacropora{5ii, p. 89) Echinodathria ramosa, 8p.ii.(18). 



New genera have been established as follows -.—Hemitedania^ 

 for Phaphisia ajionyma Carter ; Axiamon, for Reniochaiina 

 lamella Whitelegge (non Lendeufeld); Pseudotrachya, for Solla- 

 sella hystrix Topsent ; Stylissa, for Sfylotella Jiabelliformis 

 Hentschel; and Axinosia {with Axinella s^/miio^ica Whitelegge, 

 as type) to include Stylotella irregularis Kirkpatrick. Amor- 

 phinopsis Carter and PapiUissa Lendenfeld have been revived — 

 the latter provisionally as a subgenus of Cliona. Plectodendron 

 Lendenfeld, is found to be identical with the almost forgotten 

 Caulospongia Kent, and Strongylophora Dendy, to be a synonym 

 of Petrosia. The genera SoUasella and Stylotella{s. sir.) are re- 

 moved from the family Axinellidae and placed in the Donatiidse 

 and Suberitidse respectively. 



For convenience of reference, I deal with the species in the 

 same order and under the same names and family headings as in 

 the Catalogue. 



Revision of the Species. 



Faniilia TETHYD^ ( = Donatiid^e). 



Genus T e t h Y a ( = Donatia). 



Of the difficulties which the identification of many of the 

 species to be revised has presented, the greatest by far, from 

 the point of view of the expenditure of time they have occasioned, 

 have been those in connection with the several species of Tethya 

 {i.e., Donafia). In the first place, it was found that the speci- 

 mens labelled as the types of these species, excepting only T. 

 in/lata, comprise in each case examples of two or three species 

 (or varieties)— among them, in the case of 7\ corticata and 7\ 

 hevis, being examples even of the genus Tethyorrhaphis (which 

 outwardly are hardly to be distinguished from the accoinpanying 



