96 



BIOLOGICAL SUKVEY OF 



ISOCHELAE 



DISTKIBUTION 



vancouverensis .109-.163 



av. .019 Composed of a West coast of Van 



abundant rather irregular couver Island 



reticulation of north of Quatsino 



spiculo fibers Sound, 30 to 50 



fathoms 



quatsinoensis 



.144-.216 av. ..026 Consisting of West coast of Van- 



of stout couver Island 

 distinct spiculo north of Quatsino 



fibers radiating 

 outwards to the 

 surface, joined 

 together by less 

 regularly disposed 

 and less robust 

 fibers, the whole 

 forming an irreg- 

 ular reticulation 



Sound, 30 to 50 

 fathoms 



laxa 



av. .222 



av. .026 



Composed of bands Oyster Bay, Van- 

 of outwardly as- couver Island, 20 



cending spiculo 

 fibers crossed at 

 right angles and 

 in an irregular 

 manner by sec- 

 o n d a r y fibers, 

 forming an irreg- 

 ular reticulation 



fathoms 



EsPERiopsis sp. ( ? ALDERi Bowerbank) 



Lundbeck (1905, p. 15, pi. 8, figs. 30a-c). 



There is one small, bulbous, slenderly stalked specimen of 

 this species, taken at D 95, on rock and shell bottom, depth 

 about 80 feet. This specimen differs in some minor details 

 from Esperiopsis quatsinoensis, and it has been somewhat 

 doubtfully identified as Esperiopsis ( f alderi). 



Spicules. Megascleres. The styli are usually rather 

 strongly curved and taper gradually to a rather long point. 

 Their length varies from .364 mm. to .445 mm., with the mode 

 at .405 mm. 



