30 RECORDS OK THK AU^^T^;AMA^' MFfJEUM. 



The mesial sarcotheca is veiy nearly as long as the hydrotheca, and 

 is closely adnate throughout its length. The aperture is simple and 

 oblique, and has a slightly undulated margin. A small septum runs 

 across the cavity of the mesial sarcotheca. The lateral sarcothecae are 

 adnate up to the hydrotheca-margin, the upper posterior corner attaining 

 a level somewhat higlier than tliat of the hydrotheca. They are saccate, 

 I'oughly triangular in outline, with a broad, free mai'gin, which never 

 becomes tubular at the eiuls. On the liydrocladiate tube there are three 

 cauline sarcothecae to each ititernode ; one antero-lateral in position at the 

 origin of the hj-drocladium, another a little below this in the middle line 

 on the anterior sui'face, both of which are similar to the lateral 

 sai'cothecae, and a thii'd similar to the laterals in shape — but smaller — 

 is situated at the back of each axil. On encli accessory tube the cauline 

 sarcothecae are small, numerous, and arranged in a single, evenly-spaced 

 series along the whole length of the tube. 



Gonosome. — The gonangia ai'e borne singly on the branches at the 

 bases of the hydi'ocladia. They are oblong-ovate, with a latero-terminal 

 orifice. No stalk is present, and in frontal view they appear as much 

 elongated (length three times maximum breadth) cylindrical bodies, with 

 the aperture lying a little within the upper margin, and Facing the 

 observer. The aperture is peai'-shaped, with its basal portion distinctly 

 conti'acted. There is a slight pit-like depression situated immediately 

 below the lower lip of the aperture. In lateral asjaect the profile is 

 obovate, with the summit curved over the latero-terminal orifice, which 

 faces outwards and slightly downwards. The gonangia reach a length of 

 1"75 mm., with a maximum diameter of 0"59 mm., about the proximal 

 third of their length. 



Each gonangium is protected by a jointed, unbranched ajipendage, 

 springing from the proximal intern ode of the hydrocladi\am, and bearing 

 a single row of sarcothecae, and one or two terminal hydrothec-e. Eacli 

 protective appendage oi-iginates from one side of the hydrochulium just 

 below the hydrotheca, and is divided by oblique nodes into a series (up 

 to seven in number) of regular iutei'iiodes. Kach internode is short, and 

 bears a solitaiy sarcotheca, with the exception of one or two of the distal 

 internodes, which are longei- and provided with hydrothecfe. The 

 sarcothecae are similar to the lateral sarcothecae of the hydrotheca. 



Colonr. — BuiT. 



Dimensions. — 



Hydroclacliate tube internode, length ... ... 0-80-0 89 mm. 



Hydrocladiate tube internode. diameter ... ... .. 029 :^5 mm. 



Hydrocladium, lengtli ... ... ... ... ... uj) to 8 ram. 



Hydi'oclade intornode, lent^th . ... ... 0-59-0-63 mm. 



TTydrocliide internode, diameter ... . ... . 017-021 mm. 



llydrocladn proximal internode, length .. .. 0-87-0'89 mm. 



Hydrotheca. depth 0-42-04-3 mm. 



Hydrotlieca, breadth at mouth (lateral aspect). ()-28-0 29 mm. 



Gonangium, length ... ... ... ... 1-75 mm. 



Gonangium. iiiaximmn (Hameter ... ... . . 59 mm. 



Phylactogonium. Icngtli ... ... ... ... .. up to 4- mm. 



Phylactogonium internode (with sarcotheca), length ... U*36-0*13 mm. 



Phylactogonium internode (witli hydrotheca), length... 0-70-0-75 mm. 



