450 Verrill, Notes on Radiata. 



Group 2, Muricea (typical). This group corresponds to section B, p. 

 425. It enibraces those species in which the verrucse are bilabi- 

 ate, or have a prolonged lower lip. The spindles of the ccenen- 

 chyma and verruciB are similar and usually stout, but sometimes 

 slender and pointed.* In additioii to the 13 species described 

 above, it includes M. muricata V. {31. spicifera Lx. ); M, lima 

 E. and H. ; M. pendula Verrill ; M. laxa Verrill ; and M. ele- 

 gans Duch. and M., from the Atlantic coast of America ; and 

 probably 31. vatricosa Koll., Archipel. Bizagos, Africa ; and 3f. 

 sulphurea Ehr., locality vmknown. 



Group 3, 3J/uricella. This division includes those species which have 

 a rather thin coenenchyma, filled with long spindles ; with low, 

 subconical verrucse, arising from between the large spicula and 

 usually standing at right angles to the surface, and covered with 

 much smaller and shorter spindles. The species are M.flexaosa 

 v.. Hong Kong ; M. nitlda V., Ebon I. ; probably 31. humosa 

 Koll., and M. ticbercidata l\.6l\., from unknown localities; and one 

 or two undescribed species, which I have seen, from the E.Indies. 

 This group approaches the genus, Acts D. and Mich., but the 

 latter diiFers in having scale-like spicula covering the verrucfe. 



Echinogorgia aurantiaca VerriU, (Leptogoegia, 1st Ed., see p. 4i3). 



Callao, Peru, — Edwards and Haime.* A species allied to JEJ. sasappo 

 of the East Indies. — Reprint. 



Heterogorgia Verrill. 



American Journal of Science, xlv, p. 413, May, 1868. 



Corallum dichotomous, with a horn-like axis. Coenenchyma rather 

 thin, with a smoothish or finely granulous surface, filled with quite 

 small spicula, which are not conspicuous at the surface, and consist 

 of \arious forms of roughly warted, short spindles, heads, double- 

 heads, double-stars, crosses, with many irregularly shaped, small, 

 rough spicula. Verruc?e rounded, somewhat prominent, smoothish 

 below, armed at summit with long, sharp, often crooked s])indles, which 

 project from the surface around the cell in the form of sharp, divergent 

 spinules. The name alludes to the remarkable diversity in tlie sizes 

 and forms of the spicula. 



* M. robusta, M. purpurea, and M. hehes V. depart considerably from the more typ- 

 ical species of this group, in having smaller, short, stout, very rough and irregular 

 spicula. Gonigoria clavaia Gray (see page 444) appears to belong to the same group, 

 and in case a subgeneric name be desirable for these species Gonigoria may be used. 



