8 



nse mass of spicules immersed in a tough matrix <>i" connective tissue. The polyps are 

 completely retractile and the upper surfaces of the tentacles are encrusted with spicules, many 

 • 't which .ir<- trans> 



The a\is is hard, calcj and without corneous layi 



S ! doublé heads and girdled spindles whose surfaces are covered 



with verrucse which are often in whorls and not so massed together as in Nicella. There are 



rical spindles with pointed ends and regular whorls of verrucae; and many 



i the doublé heads and girdled spindles, and between the latter and true 



symi \ few crosses are also seen. 



rhe colony is yellowish brown in color, ocraceous in places, and also shows 

 brown. The polyps are colorless in alcohol. 

 General distribution. The type locality is the Hyalonema ground, off Japan. 



is. 



This specimen is referred with some hesitation to this species. Taking into account the 

 changes in form of the calyces in different stages of contraction it agrees fairly well with the 

 original description. 



.clla umbraculum (Ellis and Solander). 



\ia umbraculum Milis and Solander. Natural History of Zoophvtc-, 1787, p. 80. 

 / umbraculum Lamouroux. Exposition Méthodique, [821, p. 34. 

 Rhipid umbraculum Valenciennes. Comptes rendus, A.cad. Sci., Paris, 1855, p. 13. 



Rlu: iculum Milne Edwards et Haime. Hist. nat. des Coralliaires, 1857, p. 17S. 



Umbracella umbraculum Gray. 1'roc. Zool. Society of London, [857, p. 288. 

 Ha umbraculum Verrill. Huil. Museum of Comp. Zool., 1864, p. 37. 

 'la umbraculum Studer. Alcyonarien aus der Sammlung des Naturhistorischen Museums 

 in Lübeck, 1K04, p. 1 iS. 



Stat. 204. 4 : 20 S., (22 58 E. 75 to 94 mei 



lony strictly tlabellate and reticulate, 15 cm. in height and with a spread ol 8.2 cm. 



Main stem 2.7 cm. long and 2.8 mm. in diameter. At its distal end it breaks up into three 



branches, one of which forms nearly the whole of the specimen. This branch is fairly symme- 



trical in itsell ' onsidering it as a colony its main stem is 14 mm. long and 2.6 mm. in 



diami >und in section and devoid of calyces. It can be traced for 4.4 cm. before it hreaks 



ind is dissipated in the general network of the colony. It gives <>iï alternate branches 



which are short or feebly branched, except the upper one which curves upward and ontward 



ly to t' ilony, giving off numerous lateral twigs which go to form the 



late mass. The anas: are quite numerous. The ultimate branchlets are very short. 



and about .;.'> mm. apart, and very slender, beine aboul 1 mm. in diameter. One side <>t the 



branche, l colony is devoid of calyces. The latter are in two alternating rows, luit are not 



being more on the side opposite the nude face, and. it" that be regarded as 



ing antero-lateral in position. 



