1909.] N. AnnandaIvE: The Indian Cirripedia Pedimculata. 63 



being so, it is necessary to modify the arrangement of Gruvel's " Anaspidœ " pretty 

 considerably. It is difficult, moreover, to separate Heferalepas very widely from 

 Conchoderma, which, again, has indubitable affinities with Lepas. Alepas on the other 

 hand, as restricted by Pilsbry, stands in some kind of relationship to Chcetolepas, 

 Anelasma and Hoek's new genus Microlepas. It is not altogether clear, however, 

 how far this relationship is genetic, and as I have not seen any of these forms I can- 

 not express a definite opinion. The four genera may be considered provisionally as 

 forming a subfamily of the lyCpadidae. 



There does not seem to be any very great gain in subdividing the '' Polyaspidœ," 

 the characters on which Gruvel bases the separation being clearly adaptive and con- 

 nected with a difference of habits. I think it as well, however, to emphasize the 

 close relationship between the genera Pœcilasma, Megalasma and Dichelaspis by 

 regarding them as constituting a subfamily. For these reasons I propose to arrange 

 the Pedunculata as follows : — 

 Suborder PEDUNCULATA. 

 Family I.— POLUCIPEDID^. 



Pedunculate Cirripedes in which the capitulum bears more than five valves 

 with distinct centres of calcification. The peduncle clothed with well- 

 defined scales or plates. Cirri long and curved ; lateral appendages present 

 or absent ; anal appendages usually well developed, consisting of several 

 joints. Parasitic males in one genus. Genera — Pollicipes, Scalpellum, 

 Lithotrya. 

 Family II.— IBI.ID^. 



Pedunculate Cirripedes in which the capitulum bears four chitinous plates, 

 which contain calcareous salts in older individuals. Peduncle not very 

 clearly differentiated from the capitulum, bearing chitinous spines at any 

 rate in young individuals . Cirri long and curved ; lateral appendages absent ; 

 anal appendages with several joints. Parasitic males occur. Genus — Ihla. 

 Family III.— IvEPADID^. 



Pedunculate Cirripedes with a well-defined capitulum , which typically bears 

 five calcified plates. In many species, however, these plates tend to break 

 up or even to disappear altogether. Cirri long and curved ; lateral append- 

 ages present or absent ; anal appendages, when present, with a single 

 joint or with several or many joints. Parasitic males not produced. 

 Subfamily {a). — Oxynaspidin^. 



Small species with five well-developed valves. The valves bearing small 

 calcareous points and covered by a membrane studded with chitinous 

 spines. I^ateral appendages absent ; anal appendages very small or 

 absent. Prosoma feebly developed. Genus — Oxynaspis. 

 Subfamily ( h ) . — LEpadin^ . 



Species typically with five valves which occupy the greater part of the 

 surface of the capitulum. These valves frequently much reduced or 



