IIALECIUM MURICATUM. 223 



[Coast of Belgium (Van Ben.) : Greenland (Mb'rch) : 

 Tromso and North Cape in 30-50 fathoms., common 

 (Sars): Labrador (A. S. Packard, jun.): Massachusetts 

 Bay (A. Agassiz): Mediterranean (teste Pallas).] 



2. H. MURICATUM, Ellis and Solander. 



SERTULARIA MURICATA, Ellis 8f Soland. Zooph. 59, pi. vii. figs. 3, 4 ; Esper, 



Pflanz. Serb. tab. xxxi. figs. 1, 2. 



LAOMEDEA MURICATA, Lamx. Expos. Meth. 14, pi. vii. figs. 3, 4. 

 CAMFANULARIA MURICATA, Slainv. Actinolog. 473. 

 TIIOA MURICATA, Couch, Corn. Faun, pt. iii. fig. 16. 

 HALECIUM MURICATUM, Jofmst. B. Z. 60, pi. ix. figs. 3, 4. 



Plate XLIII. fig. 1. 



ZOOPHYTE stout and riyid, springing from a fibrous mass, 

 irregularly and densely branched, yellowish brown; STEM 

 and branches compound, consisting of many tortuous 

 tubes agglutinated together, sometimes simple at the 

 extremity ; branches erecto-patent, pinnate, slightly 

 tapering; pinnse alternate, delicate, jointed ; HYDRO- 

 THECJE placed alternately, one below each joint, tubular, 

 rather short, with a much everted rim ; GONOTHEC^E ovate, 

 on a short pedicel, roughened by raised roivs of prickles, 

 which radiate towards each side from a central line, 

 crowded on the stem and branches. 



H. MURICATUM is of a rugged aspect; the stems and branches 

 are thick and coarse, and frequently almost hidden by the 

 clustering masses of capsules. The ramification is luxii- 

 riant, erect, and rigid. 



The capsules, which are beautiful objects under the 

 microscope, have much the appearance of a minute bi- 

 valve shell, with a spinous surface; they are borne in 

 extraordinary profusion on all parts of the zoophyte. No 



