36 NEW INVERTEBR ATA FROM 



elongated bodies. There is a projection with set* and a 

 ventral cirrus on the ventral side, and on the dorsal a pair 

 of filamentous appentlages on each segment. 



The most distal from the head of all the segments of the 

 larger region of the body has the rectangular lateral l)od- 

 ies reduced to spatulate appendages. Here also the dorsal 

 appendages are smaller, and the tuft of setse more conspic- 

 uous. These seta> are simple, unjointed, serrated spines. 



The posterior region of the body is unjointed, non-spinif- 

 erous. The anus is terminal, surrounded by a colored zone 

 or ring. 



The operculum has the appearance of being morpholog- 

 ically formed of a consolidated crown of black chitinous 

 spines, similar to the ordinary body spines. On my visit 

 to England last summer I examined fragments of the worm 

 tubes of SabeUaria alveolata and find them very different 

 from the masses of tube-cases of S. Calif ornica. The At- 

 lantic SabeUaria vulgaris mentioned by Verrill is also very 

 difierent. 



The ova of 8. Galifornica were observed to be deposited 

 singly, not in clusters or strings. They are white and 

 opaque and each ovum is peripherally surrounded by a 

 transparent cortical covering. 



Sabella Pacifica sp. nov. 



(PLATE VII, FIGS. 1, 2.) 



At many places on the cliffs at Punta del Castillo, at 

 Santa Barbara, I found what seemed to be a compact green- 

 ish rock riddled with tubes of a worm belonging to the 

 genus Sabella. At first this was regarded as the work of 

 a species of boring annelid, but afterwards it was found 

 that the clay and foreign matter had simply packed in about 

 the worm tubes forming a solid rock-like mass. 



The head of this Sabella is armed with club-shaped ten- 



