428 Prof. J. A. Thomson and Mr. W. D. Henderson on 



versible zooids, a tentacular operculum, echinate spindles 

 and iiockey-club forms, and many peculiarities of structure. 



The genus Acanthomuricea, represented by A. 7'amo.ia 

 from 7° 55' N., 81° 47' E., 506 fathoms, and A. spicata from 

 6° 31' N., 79° 38' 45'' E., 401 fathoms, is a Muriceid, perhaps 

 related to Placogorgia (Wright & Studer). The two species 

 are upright colonies, irregularly branched in one plane, with 

 thin bark-like coenenchyma of rougli imbricating scales, witli 

 prominent verrucae on all sides, with conical tentacular 

 opercula, and with very heterogeneous spiculation. 



The genus Calicogorqia, represented by C. investljatoris 

 from 11° 14' 30" N., 74° 57' 15" E., 68-148 fathoms, and 

 C. ruhrotincta from the Bay of Bengal, 88 fathoms, is a 

 Muriceid, probably related to Verrill's somewhat vaguely 

 defined Anthogorgia. The colonies are irregularly branched 

 in one plane, the verruca are prominent with spicules in 

 eight bands, with a conical operculum consisting of a crown 

 and points, with warty spindles straight or carved. 



The genus Thesioides, from 1«° 0' 15" N., 93° 30' 45" E., 

 448 fathoms, and 16° 25' N., 93^ 43' 30" E., 463 fathoms, 

 is a Kophobelemnonid, near BatJiyptilum, with a greatly 

 elongated slender rachis borne by a short stalk without 

 pinnules, with long slender autozooids without calyces and 

 without any spicules. 



List of Species. 



Svmpodiura indicum, sp. n. 



decipiens, ?p. u. 



iiicrustaus, sp. n. 



Order I. STOLONIFERA, IliL-kson. 

 Family Comulariidae. 



Synij;odium gi-amilosuin, ?p. n. 



tenue, sp. n. 



piikhrum, sp. ii. 



Order II. ALCYONACEA, Veirill (pr.) p a-te). 

 Family Alcyonidae. 

 Sarcopliytuiu aberraus, sp. n. \ t>arcop.li}linn ajravicoides, sp. u. 



Family Kephth57idae. 

 Siibtamily Si'ONUOKiX.ii. 

 Sponp.des uliginosa, sp. n. I Lithophytiuu iudimni, sp. ii. 



• Alcocki, sp. 11. I 



Chironeplitliya variabilis, Ilicksm. 



niacrt spic'ulata, sp. n. 



Slon.'acaiUhia iudica, gcii. et sp. u. 



Subfamily SiPiiONOGnuoix.K. 



\gaviooidos Alcotki, Hinipoii, gon. 

 ft sp. u. 



