836 



ON A NEW SIPHONOGORGID GENUS CACTOGORGIA. 



Comparative Table of Species of Cactogorgia, n. gen. 





Nature of 



Nature and 



Arrange- 

 ment of 

 Spicules of 

 Polyparium. 











Species. 



Stem 

 and Stock. 



Origin 

 of Lobes. 



Verrucae. 



Anthocodue. 



Spicules. 



Locality. 



ft celosi- 



Much flat- 



Flattened 



Longitu- 



Distinct ; sup- 



Definite "crown and 



A. Stem and stock — 



Andamans. 



oides, n. sp. 



tened ; stiff 



and bear 



dinal. 



ported by 



points " arrangement ; 



transparent spindles 







and rigid ; 



polyps ; 





longitudin- 



"crown" consists of 



with multituberculate 







with a trans- 



origin in- 





ally arranged 7-10 rows of curved 



warts, 2 - 2 mm. x 0'55 







lucent sheen : 



definite. 





spicules with 



spindles ; " points " 



mm. to - 75 mm. x 0'3 







colour, light 







apices pro- 



each of one pair with 



mm. 







brown. 







jecting a- 

 round the 

 edge ; occur 

 along the 

 margin of 



occasionally one or two 

 smaller ones between ; 

 tentacles bear numer- 

 ous scales "en chev- 

 ron " on the aboral 



B. Anthocodise — spindles 

 or clubs — 0'95 mm. x 

 - 18 mm., - 85 mm. x 

 - l mm. 



C. Tentacles— scales 0"07 













the colony. 



surface. 



mm. x 0'035 mm. 



Off Cape 



ft expansa, 



Cylindrical, 



As in ft 



Indefinite ; 



Not very con- 



Definite ' ' crown and 



Opaque, yellowish. 



n. sp. 



stem with 



celosioides. 



interlock- 



spicuous ; no 



points " arrangement ; 



A. Stem and stock — 



Comorin, 





fan - shaped 





ing in all 



definite ar- ' ' crown " consists of 



multi-tuberculated 



38 





polyp - bear- 





directions. 



rangement about 8 rows of 



spindles, 1*5 mm. x 



fathoms. 





ing lobes ; 







of spicules ; 



curved spindles ; 



0-3 mm., 1-1 x 0'2 mm. 







densely spic- 







mainly on 



" points " made up of 



B. Anthocodise — spindles 







ulose and 







the margin 



6-8 pairs arranged 



and clubs, - 8 mm. x 







very rigid ; 







of the lobes. 



"en chevron," and 



- l mm. 







very opaque 









increasing in size from 



C. Tentacles — pale yel- 







in appear- 









the base upwards. 



low transparent scales, 







ance. 











0'04 mm. xO'015 mm. 





ft alci- 



Much con- 



Consider- 



Irregular ; 



Fairly large ; 



Very large ; spicular 



Transparent. 



Andamans; 



formis, 



torted, sinu- 



ably flat- 



interlock 



spicules dis- 



armature visible to the 



A. Stem and stock — 



Arakan 



n. sp. 



ous ; antler- 



tened ; 



in all di- 



posed most- 



naked eye; "crown 



rough warty spindles, 



Coast, 13 





like ; stiff 



arising 



rections. 



ly longitu- 



and points" arrange- 



1 "6 mm. x - 45 mm. to 



fathoms. 





and rigid ; 



mainly at 





dinally ; oc- 



ment not so definite ; 



0"06 mm. x - 15 mm. 







translucent. 



the bends 





cur princi- 



"crown" consists of 



B. Anthocodite — spiny 









in the 





pally on the 



10-14 rows of curved 



or warty spindles, 1 '2 









stock. 





margin of 

 the flattened 

 lobes. 



spindles ; in each tri- 

 angular ' ' point " there 

 are 10-15 spindles, 

 with no very regular 

 disposition, but slight- 

 ly "en chevron." 



mm. x 1 mm., 0"5 

 mm. x - 05 mm. 

 C. Tentacles — scale-like, 

 0-12 mm. xO-02 mm. 

 to 0-04 mm. x 0-02 mm. 



i 



EXPLANATION OF FIGURES. 



Fit 



1. Oactogor 



qia 



celosioides, n. sp. 



2- 





11 



3a. 





>> 



3b. 





>J 



3c 





!) 



4. Cadogot 



gia 



alcif or mis, n. sp. 



5- 





u 



6a. 





>i 



6b. 





)> 



6c. 





>> 



7. Cactogorgia expansa, n. sp. 



8. 





11 



9«. „ 





11 



96. 





»J 



9c. 







Polyp ( x 10). 



Complete colony ( x 2). 



Spicules from the stem. 



Spicules from the anthocodise. 



Spicules from the ahoral surface of the tentacles. 



Polyp ( x 10). 



Complete colony ( x 2). 



Spicules from the stem. 



Spicules from the anthocodise. 



Spicules from the aboral surface of the tentacles. 



Polyp ( x 10). 



Complete colony ( x 1J). 



Spicules from the stem. 



Spicules from the anthocodiae. 



Spicules from the aboral surface of the tentacles. 



/DEC. I 



