DOUBLE LOXOSOMLJE. 
W. S. NICKERSON. 
WHILE investigating the structure of Loxosoma davenporti 
several abnormal specimens came under my observation. 
These, five in number, are all double monsters, and in all cases 
the paired individuals are united in the same manner — side to 
side ; the oral surfaces are turned in the same direction, and 
the stalks are so united as to have a common foot. Three of 
Col) 
Fic. 1. Fic. 3. 
Fic. 1. — Anterior aspect. 18 and 19 tentacles. 4.= bud; /. = flask organ. x 57. 
Fic, 2. — Anterior aspect. 16 and 15 tentacles. x 57. 
Fic. 3.— Anterior aspect. 11 and 12 tentacles. f. = Anlage of flask organ. x 114. 
the specimens are fully grown ; the other two are immature, 
one being a bud still attached to the parent, and the other, 
though detached when found, was even less developed, and had 
undoubtedly been separated from the parent by the handling 
it had undergone in preservation. 
These cases represent three different degrees of union 
between individuals. Three of the cases, one adult (Fig. 1) 
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