Tedania gurjanovae - — Bakus 
63 
Burton (1932:345) recognized the Vancouver 
Island specimen of Tedania fragilis Lambe (see 
Lambe, 1895:136) as 1 of the 24 valid species 
of its genus. De Laubenfels (1961:197) col- 
lected Tedania fragilis from a depth of 50 to 
60 m, northeast of Blakeley Island (San Juan 
Archipelago). I examined the holotype (USNM 
No. 7401 ) of Tedania fragilis Lambe and found 
that it differs from specimens discussed in this 
paper in the following features: the spiculation 
is larger and onychaetes are often erratically 
curved. The short-size category of onychaetes is 
lacking. The hastate tornotes often have slightly 
inflated ends that may be microspined. Some 
tornotes have one end hastate and the other 
rounded or subtylote. Style tracts are more 
abundant and interstitial styles are irregularly 
distributed, although some meshes do occur. 
The holotype is dry and exceptionally fragile. 
The specimens from the San Juan Archipelago 
described in this paper are placed tentatively in 
Tedania gurjanovae Koltun. 
SUMMARY 
The adult morphology, larval metamorphosis, 
biological associates, taxonomic status, and dis- 
tribution of Tedania gurjanovae Koltun are de- 
scribed. This species has been dredged from a 
rock-shell substratum on the continental shelf 
and apparently ranges from the San Juan Archi- 
pelago in the northeast Pacific to Tatar Strait 
in the northwest Pacific. The larval natatory 
period is 6 to 7 hr. Metamorphosis involves a 
complete collapse of the larva into an amorphous 
mass somewhat platelike in over-all shape, within 
which many cells can be seen. Segregation 
occurs; this results in a core of inner cells 
( archeocytes ) and an outer transparent layer of 
protoplasm not shown definitely to be cellular. 
Development continues to a miniature adult- 
like habitus which is reached after about 2 to 3 
weeks. 
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