GS4i PEOF. W. A. HERDMAN S EEYISED 



Family VI. C(EL0C0EMIDJ5, Herdman, 1886. 



Colony massive, deeply concave on the upper surface, not 

 attached. 



Ascidiozooids large, scattered all over the surface. Branchial 

 apertures 5-lobed. 



Test ^oh and gelatinous. Test-cells numerous. Calcareous 

 spicules present in the outer layer of the colony. 



Branchial sac large and vrell developed. 



Dorsal lamina represented by a series of languets. 



Alimentary canal extending beyond the branchial sac pos- 

 teriorly, but not forming a distinct abdomen. Stomach smooth- 

 walled. 



Gonads hermaphrodite in the adult ascidiozooid. Testis com- 

 posed of a number of pyriform vesicles, which join a spirally 

 coiled vas deferens. 



This family contains the single genus Ccelocormus. 



CcELOCOEMUS, Herdman, 1886. 



Colony massive, but not attached ; deeply concave on the upper 

 surface, so as to contain a large central cavity. 



Ascidiozooids large, not distinctly divided into regions ; 

 branchial aperture 5-lobed. 



Test soft and gelatinous. Test-cells numerous and large. No 

 bladder-cells. Calcareous spicules present in the superficial 

 layer. 



Branchial sac large. Stigmata very long and narrow. 



JDorsal lamina represented by a series of long triangular 

 languets. 



Tentacles well developed. 



Alimentary canal extending beyond the branchial sac pos- 

 teriorly, but not forming a distinct abdomen. Stomach smooth- 

 walled. 



Gonads not large. Ovary only present in the adult ascidiozooid. 

 Testis formed of a number o£ spermatic vesicles. Vas deferens 

 spirally coiled. 



One species, Ccelocormus Succleyi, Herdm., from the S. Atlantic 

 at a depth of 600 fathoms. 



