34 "ENDEAVOUR" SCIENTIFIC RESULTS. 



forwards ; some with a blunt rounded tooth projecting into 

 the cavity from the front, a little above the base ; border with 

 a sharp pointed anterior tooth, and a triangular tooth on 

 each side near the front, generally a minute undulation between 

 the anterior and the lateral teeth, the rest of the border 

 slightly sinuous at the sides (mostly with two slight undulations 

 between the lateral tooth and the lateral sarcotheca), not forming 

 elevated lobes; an angular lobe at each side behind the lateral 

 sarcotheca, back excavated, adnate. Hydi-othecal internodes 

 with septal ridges opposite the intrathecal fold and the base of 

 the lateral sarcotheca?. 



Mesial sarcotheca? slightly over half the length of the 

 hydrothecsB, adnate most of their length, but with a short free 

 projecting portion, terminal and lateral apertures confluent, 

 forming an oblique canaliculate aperture. Lateral sarcotheca? 

 tubular, directed forward and outward, scarcely projecting 

 beyond the hydrotheca-margin ; aperture small, round, canalicu- 

 late. Cauline sarcotheca? broad, completely open above, two on 

 the rachis at the base of each hydrocladium. 



Gonangial pinna? mostly in pairs, with the first five or six 

 internodes bearing sarcotheca? only ; corbula (female) long, con- 

 sisting of up to between thirty and forty pairs of alternate ribs, 

 springing from separate internodes of the rachis as narrow 

 pinnules, but expanding above into broad leaflets, which unite to 

 form a closed corbula ; the distal mai^gin of each leaflet con- 

 tinued a little beyond the line of union so as to form a free- 

 edged narrow extension or wing, bordered with sarcotheca? 

 and continued upwards into a large crest above the corbula, 

 having both edges free and bordered with sarcotheca? ; a lateral 

 spur or secondary leaflet projecting outwards and forwards 

 from the distal edge of each rib just above the origin, 

 bearing two series of sai'cotheca? (up to four or five on each 

 side), but no hydrotheca? : (male) narrower, with the lateral spurs 

 very short, and the superior crests very slightly developed or 

 entirely wanting. 



Colour. Light fawn. 



Sevei'al specimens were examined, attaining about a foot in 

 height. The stems are rather slender, in proportion to their 

 height, and the branches are confined to about three inches at the 

 top, where there are two or three pairs, about two to three inches 

 long. One had four pairs, but the lowest pair was already bare 

 of hydrocladia. The hydrocladia were somewhat shorter than 

 those of A. tasmcmica (up to about, half an inch). 



