the Actiniarian Family Aliciidaj. 11 



occur at the termination of eacli branch ; tlie cnJoderin 

 becomes much thickeneil and contains granuUir matter. 



Gonads. — In one specimen dissected developing; ova were 

 found in great numbers extending almost the whole length 

 of the mesentery, and in places giving rise to considerable 

 enlargements. 



Bunodeopsis strumosa, Andres. (PI. I. fig. 5.) 



Bunodeopsis strtnnosa, Andres, 1880, p. 315. 



Bunodeopsis strumosa, Andres, 1883, p. 444, pi, vi. fig. 1, pi. xiii. fig. 5. 



Form*. — Base adherent, usually large and oval, but variable 

 in size and shape. Column short, delicate, very extensible, 

 protruding here and there in irregular outgrowths or vesicles, 

 the latter varying in size and simple or compound, apparently 

 sessile, and having only very slight tubercular and annular 

 sujierficial thickenings ; capitulum much developed, smooth, 

 delicate, regular, cylindrical, or caliciform. Disk medium, 

 wider than capitulum, rounded, either flat, concave, or promi- 

 nent, without gonidial marks. Tentacles retractile f, not 

 very numerous (48), tricyclic, 12 [6, 6?J, 12, 24, entacmseous, 

 large, marginal, erect or bent outwardly, subulate, very 

 flexible, covered with urticating spots. Peristome variable, 

 with radiating lines ; mouth sometimes with reversed lips, 

 but not a special character ; gonidial grooves wanting. 



Colour. — Base whitish-brownish-yellow. Column yel- 

 lowish, with yellow-brownish-ochre bands. Capitulum dirty 

 white, uniform, transparent. Tentacles transparent, whitish. 

 Peristome whitish. 



Dimensions. — Small ; basal diameter 1*5 to 2 ccatim. ; 

 length of tentacles 2 centim. 



Locality. — Habitat on the leaves of Cymodocea requorea 

 [Phycagrostis minor) ^ uprooted, floating on the surface, or else 

 on Fosidonia, Zostera, &c. Also on stones and rocks. 



Varieties. — (a) badia. As above. 



(y8j cana. Entirely white ; most frequently found on the 

 shores of Lake Fusaro, Naples; more delicate and small. 



Base. — The layers of the base are well developed, being 

 much thicker than in the vesicular portion of the column-wall. 

 The ectoderm is covered with a layer of short closely-set 

 cilia ; elongated nuclei are arranged in a narrow peripheral 



• The description of the external characters is practically a translation 

 of that given by Andres in ' Le Attinie.' 



t A curious instance of extreme retraction was met with in one 

 specimen ; the tentacles had been withdrawn into the coelenteron, and 

 afterwards one was forced into the interior of a distended vesicle. 



