1906.] ALCYONARIANS FROM ZANZIBAR. 429 



spicules in the triangular sheaf. The triangles rise from a 

 transverse ring of about three rows of spindles. 



The cortical spicules are slender spindles with a few roiigh 

 warts. A common size was 0*8 mm. in length by 0*06 mm. in 

 breadth. The inner spicules of the stem are strong spindles 

 closely covered with i-ougli warts. They vary gi'eatly in size and 

 in the number of warts ; some bear fine spines, and some are bifid 

 or slightly branched at one end. A common size is 2-6 mm. by 

 0'175 mm. 



Pi-obably the specimen is a young form, and we found no trace 

 of ova. It seems to us undoubtedly a Siphonogorgid, pei'haps 

 intermediate between Siphonogorgia and GMronephtliya ; biit it is 

 quite unlike any form known to us. With much hesita.tion 

 we have, for convenience of reference, named it Siphonogorgia 

 intermedia. 



Locality. Zanzibar shoi'e. 



Order III. PSEUD AXONIA G. von Koch. 



Family S c l E R o G o r g i n yE. 



Suherogorgia kbllikeri Wright & Studer, var. Zanzibar ensis, n. 



Family M e l i t o d i d ^e 



Wrightella erythrcea Gv?ij = Mojysea erythrcea Klunzinger. 

 ,, variabilis., sp. n. 



Family S'c l e r o G o r G i d iE. 



■ SuBEROGORGiA KOLLiKERiWriglit &, Studer, var. zanzibarensts, n. 

 (Plate XXIX. fig. 4.) 



(A.) — A small fragment consisting of a part of a, stem or bianch 

 from which two lateral branches are given ofi" on the same side. 

 The stem or branch and the lateral branches are all compressed in 

 the plane of branching. The branches come off at an angle which 

 approaches 90°, and then turn upwards and run roughly parallel 

 to the main stem or branch. On both surfaces of the main and 

 lateral branches there is an irregular groove which in some parts 

 almost disappears, being marked only by a narrow strip of 

 colourless spicules. The verruca; are arranged in a single row on 

 each of the lateral surfaces ; they are disposed alternately, though 

 at some places they are almost opposite ; they are small, and 

 appear as low rounded swellings on the sides. 



The polyps are completely retractile, and are white in colour. 

 In the tentacles, which ai'e short, there are small rod- or spindle- 

 shaped spinose spicules which are from 0-08-0-12 mm. in length 

 and have an average diameter of 0"02 mm. 



The spicules of the body of the polyp are flattened sword- 

 shaped bodies with rough warts or teeth on the edges, and may be 

 either straight or slightly curved. 



