134 



ON HTDROIDA FROM THE MERGUI ARCHIPELAGO. 



Family Plumttlariid^:. 

 Aglaopheista, Lamouroux. 

 Subgenus Lytocarpia, Kirclienpauer. 



Agla.opheis'ia crispata, Kirclienpauer. 

 [Java ; Formosa.] 



Subgenus Macrorhyncha, Kirclienpauer. 



Aolaophenia HREjsrs, Kirclienpauer. 

 Sab. Coral-bed. 



[Java sea ; Batang ; Brisbane ; ? Singapore, var.] 

 The following remark by Capt. Werner, who obtained this 

 species in the Java sea, is given by Kirchenpauer*: — " Diese 

 Pflanze fand ich beim Baden auf der Insel Onrust, iu der Java See. 

 Sie war an einen Stein angewachsen, und brannte beim Beruhren 

 wie Brennesseln, konntealso wohl ein TTrtica navalis sein." 



Dr. Anderson also mentions its remarkable stinging properties. 

 The specimen from Mergui is about a foot in length. 



Family Sertulariidjs. 

 Idia, Lamouroux. 

 Idia pristis, Lamouroux. 



Several specimens occur amongst the dredgings. I have met 

 with no notice of this interesting form but the original descrip- 

 tion of it by Lamouroux. It is clearly entitled to generic rank, 

 though the diagnosis given by this author is quite inadequate. 

 Prof. Allman informs me that the species occurs amongst the 

 ' Challenger ' dredgings, and will be described and figured in the 

 forthcoming part of his monograph on the Hydroida. The gono- 

 1 hecae are not noticed by Lamouroux ; they occur in some abund- 

 ance on the Mergui specimens. They are borne on the main 

 stein, and are urn-shaped, rounded below, expanding very slightly 

 upwards, and narrowing at the top into a short tubular, neck- 

 like orifice. They are prettily ribbed longitudinally, and supported 

 on a short peduncle. 



[Australian seas.] 



* ' U<:bor flic Hydroidenfamilic; I'lumulariduc, oinzolnc (Iruppen dorsclben, 

 unrl ilir<! Frurihtbehalton.' Hamburg, 1872. 



