18 SYDNEY J. HICKSON AND F. H. GRAVELY. 



portion of the polyp is invested by a fairly thick pellicle of very different appearance 

 from the typical perisarc of the Tubulariidse. lu many specimens, which have perhaps 

 shrunk in the preservation, the pellicle i.s only loosely attached to the body wall. 



The distal tentacles are very numerous (60-70) and about 1 5 mm. in length. 



In the proximal ring there are about 30 tentacles, each about 10 mm. in length. 



Gonoxom*'. The gonophores are situated in compact bunches in close proximity 

 to the inner aspect of the proximal circle of tentacles (fig. 16). They are almost 

 spherical in shape, the female gonophores being about 1 mm. and the male 

 gonophores 0'8 mm. in diameter. 



As in other species of the genus, they are " pseudo-medusoid " in character (fig. 35). 



In many specimens ova (fig. 35, ov. rup.) may be seen somewhat constricted in 

 the middle and obviously rupturing the wall of the gonophore. Bonnevie (6 : p. 21) 

 states that in Lampra sar&ii the ova " leave the gonophores at a very early stage 

 of their development and remain for a time attached to the mouth of the gonophores." 



LAMPRA MICRORHIZA. 

 (Plate II., fig. 14.) 



Lucidity : Off the Barrier, January 27th, 1902 ; 300 fins. 



Though small as compared with other Corymorphidae, this is by far the largest 

 hydranth of the collection. 



Unfortunately, the two specimens obtained are in a very bad state of preservation, 

 and although sections of the mass of tissues in the position of the blastostyles have 

 been made, it has been impossible to demonstrate with certainty any gonophore 

 structures. It is mainly on account of the dark brown colour that these specimens 

 are referred to the genus Lampra. 



Hydrosome. The hydrocaulus rises to a height of 50-60 mm. ; it is about 3 mm. 

 in diameter throughout, and proximally is loosely covered by a thin chitinous pellicle 

 (fig. 14, c. />.); at the proximal end it gives off a very large number of extremely 

 delicate processes for attachment (fig. 14, hrh. /.). The hydranth is not separated 

 from the hydrocaulus by a constriction. The proximal tentacles are 40-50 in number 

 and about 40 mm. in length ; the distal tentacles appear to be about 7 mm. in length, 

 but are matted together and cannot be clearly seen in the preserved specimens. 

 t'. Blastostyles branched ; 5 (?) mm. in length. 



FAMILY MYRIOTHELIDAE. 



(MVIUOTHELA?) 



(Plate III., fig. 18.) 



Locfiliti/:\\.C}., Hut Point, November 13th, 1902. 



A single specimen of a hydroid belonging probably to this family was preserved 

 in a separate tube from this locality. 



