Boone, Coelenterata, Cruises of "Eagle" and "Ara," 1921-28 31 



the hydrocladia and are subovoid, much broader at the distal end than 

 toward the proximal end, as shown in the figure; each has a lunate, 

 lateroterminal aperture. Not all of the gonangia are identical in 

 shape; some appear in profile somewhat like a bird's head, the convex 

 distal end beyond the aperture being abruptly narrowed ; these usually 

 are the less fully developed gonangia, toward the tip of the phylae- 

 togonia. Each phylactogonium bears three to four gonangia and sev- 

 eral protective nematophorous branchlets, one each arising at the base 

 of each gonangium. 

 References: Aglaophenia sigma Allman, Mem. Mus. Comp. Zool., 



vol. V, no. 2, p. 45, pi. 26, 1877. 

 Cladocarpus sigma Nutting, Smiths. Special Bull., part I, p. Ill, pi. 



26, figs. 1-2, 1900. 



Order: STYLASTERINA. 



Family: STYLASTERIDAE. 



Genus : STYLASTEE Gray. 

 Stylaster roseus (Pallas). 



Plate 3. 



Type: Pallas' type material came from the seas about St. Domingo, 

 and was probably deposited in the Leyden or Belgium museum. 



Distribution : This is a deep water species, restricted to the West 

 Indian region. Bathymetric occurrence : shallow water to 340 fms., 

 but found mostly from 50 to 340 fms. 



Material examined : Several very beautiful branches, some 7 to 10 

 inches high, dredged in 150 fms., 7 miles S. W. off Alligator Reef, 

 Florida, March 30, 1926, by the "Am." 



Color: The branches vary from ivory in the older basal portions 

 of the branches to deep rose toward the more fragile outer branches. 



Technical description: Corallum flabelliform, nonanastomosing, 

 principal branches large, compressed cylindrical rapidly dividing and 

 subdividing into smaller branches and branchlets, the distal branches 

 very delicate, elegantly graceful. In cross section the proximal 

 branches are broad, oval or subcircular, firm and hard. The cyclostems 

 are on the lateral sides of the branches, a few are found on the sur- 

 faces also. The majority are turned towards one surface; they are 

 slightly elevated; 0.7 to 1.2 mm. transverse diameter. The septa are 

 delicate, usually 12, sometimes 10 to 14 distinct septa present; colu- 

 mella minute. 



