VI 



Nexv Types. 



The genus Stereacanthia, from the Andamans, is a Siphonogorgid in the 

 vicinity of Lemnalia. A bare, densely spiculose trunk, made up of large longi- 

 tudinal canals, with thin spiculose walls, bears a branched polyparium with the 

 polyps disposed singly or in small crowded bundles ; the aboral bands of spicules 

 on the infolded tentacles form a simple pseudo-operculum ; the spicules are warty 

 spindles or golf-club forms, and there are no quadriradiate double-stars as in 

 Lemnalia. 



The genus Agaricoides, from G° 31' N., 79° 33' 45" E., is a remarkaljle Siphono- 

 gorgid perhaps distinctly related to Lemnalia (Gray, emend. Bourne), but quite 

 unlike any other type known to us. It is unl)ranched, mushroom-like, with 

 complex octagonal verrucas, pedicelled anthocodi;e, introversible zooids, a tenta- 

 cular operculum, echinate spindles and hockey-club forms, and many peculiarities 

 of structure. 



The genus Acanthomui^icea, represented by A. ramosa from 7° 55' N., 81° 

 47' E., 506 fathoms, and A. spicata from 6° 31' N., 79° 38' 45" E., 401 fathoms, is a 

 Murieeid, perhaps related to PIaco(jorgia (Wright and Studer). The two species 

 are upright colonies, irregularly branched in one plane, with thin bark-like 

 coenenchyma of rough imbricating scales, with prominent verrucfe on all sides, 

 with conical tentacular opercula, and with very heterogeneous spiculation. 



The genus Calicogorgia, represented by C. lavestigatoris from 11" 14' 30" N., 

 74° 57' 15" E., 68-148 fathoms, and C. ruhrotincta from the Bay of Bengal, 88 

 fathoms, is a Murieeid, probably related to Verrill's somewhat vaguely defined 

 Anthogorgia. Tlie colonies are irregularly branched in one plane, the verructe 

 are prominent with spicules in eight bands, with a conical operculum consisting of 

 a crown and points, with warty spindles straight or curved. 



The genus Thesioides, from 18" 0' 15" N., 93° 30' 45" E., 448 fathoms, 



and 16° 25' N., 93° 43' 30" E., 463 fathoms, is a Kophobelemnouid, near 



Bathyptilum, with a greatly elongated slender rachis borne by a short stalk 



without pinnules, with long slender autozooids without calyces and without any 



sijicules. 



Notes 011 some new Species. 



Sympodium, sp. We have described six new species of Sympodium, but 

 it seems that in this genus, as in other simple forms like Clavidaria, there is 

 considerable variability in the specific characters. It may also be that a colony 

 differs considerably according to the sul)stratum on which it grows, — a vegetable 

 axis in *S'. indicum and S. decipieas, an Antipatharian axis in S. gr'anulosum,, a 

 sponge spicule in *S'. inerustans, a cluster of sponge spicules in ;S'. tenue, a sponge 

 skeleton in *S'. pulchrum. It is not easy at present to give distinctive diagnoses 

 of our six forms, and yet the tout ensemble of the characters of each results in a 



