.V1I. RELIQUIA. 209 



3. vernacular name 4. the mode or state in which 

 the reliquium is generally found 5. its soil or geo- 

 logical situation and 6, its geographic situation 

 after which will follow the general description. 



perforated down the centre by a medullary substance, which, in all 

 probability, conveys life and sensation through this stalk-like part 

 of the animal. The propriety, therefore, of separating the zoo- 

 phita thus formed from the genus Isis, must we think be readily 

 admitted : and, as there seems no genus yet established, that can 

 properly receive them, we venture to propose one, with the fol- 

 lowing characters. 



STYLASTRUM. 

 Character cssentialis. 



Corpus crustaceum, radiatum, stipitatum : stipife sub- 

 lapideo, plerumque articulato. 



Character artificialis. 



Corpus crustaceum, stipitatum, saepiisime fixum, radia- 

 tum : radiis (in multis) dichotomis, contracti- 

 libus. 



Os centrale, quinquedentatum, superum. 

 Apertura pneter os nulla. 

 Stipes sublapideus, saepe articulatus : articulis medulla 



centrali instructis : suturis crenulatis. 



Of this genus, there are no well ascertained recent species, ex- 

 cept the two above noticed the Isis Aster ia and Isis Enirocha 

 of Linnaeus. These animals are inhabitants of the Indian seas ; 

 and, it is supposed, reside constantly in the most profound depths, 

 firmly attached to stones, rocks, or other fixed bodies. From 

 such depths they appear to be seldom removed, by the agitations, 

 to which the more superficial parts of the ocean are subject 

 Hence the rare occurrence of recent specimens of these worms. 

 In the mineral kingdom, however, as reliquia, not only the two 

 species we are now considering are frequent, but also several others 



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