460 Verrill, Notes on Radiata. 



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

 425. It embraces those species in which the verrucas are bilabi- 

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

 chyma and verruc;e are similar and usually stout, but sometimes 

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

 above, it includes 31. miirieata V. ( 31. spicifera Lx. ) ; 31. lima 

 E. and H. ; 31. pendula Verrill ; 31. laxa Verrill ; and 31. ele- 

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

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

 sulpJiurea Ehr., locality unknown. 



Group 3, Murlcella. 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.flexuosa 

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

 Koll., and M. ticberculat a I\.6\\., 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 verruciB. 



Echinogorgia aurantiaca Verrill, (Leptogoegia, 1st Ed., see p. 4X3). 



Callao, Peru, — Edwards and Haime. A species allied to M sasap)po 

 of the East Indies. — Reprint. 



Heterogorgia Verrm. 



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 shaj^ed, small, 

 rough spicula. Verruca? rounded, somewhat prominent, smoothish 

 below, armed at summit with long, sharp, often crooked spindles, which 

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

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

 and forms of the sjjicula. 



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

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

 spicula. Gonigoria clavaia G-ray (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. 



