Mr. 1 1. .1. ( 'aitfi- I'n a new Species t^Tethya. 1)9 



cluoiis ; but the ubli(|uc l>aml uii tlu- iia'tastcrmmi sccius to be 

 very persiatent. 



Isarantltd fnmaculata. 



I. sat ang^sta, fu3Co-ferrug:iuea, supra disperse albo-pilosa ; rostro 

 prothorace baud loufnore, basi latiore ct supra paulo excavato, 

 crebre punctate; anteimis art. basali breviuseulo ; protborace 

 coiit'oi-tiiu granulato, versus basin caiialiculato ; elytris parallcHa, 

 apice rotundatis, confertim gramdatis, siiif^ulis macula alba e jjilis 

 coudeusatis pone medium sitis ; eorpore intra longe albo-piloso ; 

 pcdibus ferruj,'ineis, femoribus anticis infra dentibus minutis, 

 duobus apicalibus majoribns, iusti-uctis ; tibiis intus denticulatis. 

 Long. 3| lin. 



Hah. Tasmania. 



A small, rather narrow form, noticeable for the two spots 

 on the elytra and the denticulation of the inner margin of 

 the tibiae. 



Pachyura 2f(i2>if^^osa. 



P. oblonga, postice ampliata, picea, supra confertim granulata, pubo 

 silacea maculatim varia, elytris nigro-maculatis ; rostro longitu- 

 dine prothorace cum capitc a?quali, crebre oblongo-punctato ; 

 antennis ferrugineis, art. basali paido elongate, tcrtio aiquali ; 

 prothorace sparse silaceo-maculato ; elytris singulis maculis nigria 

 in scriebus quatuor notatis ; eorpore infra pedibusque rufo-piceis, 

 griseo pilosis ; tarsis nigris. Long. (3 lin. 



Hob. New South Wales (Eope's Creek). 



This species, having the femora unarmed and foveiform 

 scrobes, must be placed with Pachyura ; in habit, however, it 

 closely resembles Isacantha. 



XII. — Dcscriiition and Illustrations of a new Species of 

 Tethya, with Observations on the Nomenclature of the Te- 

 thyadse. By H. J. Carter, F.R.S. &c. 



[Plate IV.] 

 Tethya casula, n. sp. PI. IV. figs. 1-9. 



Massive, erect, sessile, consisting of a hemispherical head 

 or body (PI. IV. fig. 1, a) supported on a conical or umbrella- 

 like expansion (fig. ],Z»6), which, rn situ, is sunk into the 

 sand, and serves the pui-pose of a root. Colour light greyish 

 yellow. Surface of the head rough, hispid, from the projection 

 of fine spicules in lines corresponding with polygonal inter- 

 spaces in which the pores (fig. 2, a) and vents (fig. 2, h) are 

 respectively situated. Ends of the spicules radiating from 

 the surface generally, short and erect on the summit, becoming 



