

CYMOTHOIDEA. 



775 



Length, nearly five lines. The posterior margin of the fourth tho- 

 racic segment is short pubescent; that of the next and others follow- 

 ing, including the abdominal segments, is longer hairy. The epimerals 

 are very distinct. 





Family III. SPHEROMID^. 



Subfamily SPHEROMIN^. 



Genus SPHEROMA. 



1. Abdomen posticS integrum. 



a. Segmenta thoracis nulla medio marginia postici vel processum vel dentem gerentia. 



Spheroma gigas, Leach. 



Plate 52, fig. 1, represents an under view, showing the caudal 

 stylets and outline of the abdomen. 



New Zealand, along shores of Bay of Islands. 



The specimens here referred were four to five lines in length. 

 Colours, brown to brownish black, with some irregular whitish spots. 

 The caudal lamellae do not quite reach to the line of the extremity of 

 the abdomen ; they are lamellate, the inner rounded at extremity, but 

 subacute. The last segment of the abdomen is evenly convex, with 

 the sides arcuate (and not sinuous), and extremity rounded and 

 moderately narrow. The surface of the body is smooth, but some 

 appearance of granulation may be detected under a high magnifying 

 power. 



Spheroma lanceolata, White. — Plate 52, fig. 1 a, view of mouth ; 



