1872.] rev. o. p. cambridge on new species of erigone. 747 



Sydella. 



Coral erect (?), straight, cylindrical, rather tapering, covered with 

 cylindrical cells, tapering at the end and placed in four rather irre- 

 gular longitudinal series, covered externally with red fusiform spi- 

 cules, placed very close together in a longitudinal direction. Polypes 

 completely retractile, leaving a small rounded end to the cell when 

 retracted. 



Only known from the figure of Dt. Hooker, which apparently 

 represents the apex of a branch, and does not show any internal axis 

 if one exists. 



This figure is here accurately copied. 



Sydella australis. (Plate LXIII. figs. 8 & 9.) 

 Hab. Australia, Sydney {Br. Hooker). 



Mopsella australis. — There is a beautiful ngure in Dr. Hooker's 

 drawings of a coral which I believe is the same as the one here 

 described ; but it is much larger and the polypes much closer : 

 there is no representation of the axis. No habitat is mentioned. 

 This drawing is copied, with the rest of Dr. Hooker's drawings, on 

 Plate LXIII. 



EXPLANATION OF THE PLATES. 



Plate LXII. 

 Figs. 1-3. Fannyclla rossii. 



4. Primnoa lepadifcra, polype-cell from North Sea for comparison. 

 5 & 6. Errina fissurata. 

 7-9. Mopsella australis. 



(All from Mr. Stokes's drawings.) 



Plate LXLTI. 

 Figs. 1-3. HoolcereUa pulchella. 

 4-7. Tubulipora nivalis. 

 8 & 9. Sydella australis. 

 10-12. Mopsella australis. 

 (All from Dr. Hooker's drawings, except figs. 4-7, which are from Mr. Stokes's 



drawings.) 



Plate LXIV. 

 Figs. 1-3. Thouarella antarctica. 

 4. Porella antarctica. 



(From specimens in the British Museum.) 



5. Descriptions of Twenty-four new Species of Erigone. 

 By the Rev O. P. Cambridge, M.A., C.M.Z.S. 



[Keceived June 4, 1872.] 



(Plates LXV.&LXVI.) 



With one exception, the Spiders here described, and supposed to 

 be new to science, are European, the single exception being one found 

 near Alexandria, Egypt {Erigone alexandrine). One species only 

 (E. prominula) has been found also in England ; of the remainder 

 two were found at Rome, one in the neighbourhood of Paris, one at 



