Gatty Marine Laboratory, St. Andrews. 153 
divided by the long ceratophore into two nearly equal halves. 
All the others have long ringed ceratophores. The frontal 
tentacles are somewhat ovate and the pedicle is narrow. 
The palpi are separated by a distinct interval from the ante- 
rior border of the snout, and form two prominent, almost 
cylindrical bodies which have freer motion than usual. 
Body probably 3-4 inches in length, somewhat like that 
of H. tubicola in contour, though differing in detail. The 
first segment is slightly narrower than the second and bears 
a slender tentacular cirrus at the anterior margin in each 
lateral region, the distance between them being proportionally 
great. Like the succeeding five segments it is narrower and 
more rounded than those of the flattened region following. 
The five feet and their processes are also larger and more 
conspicuous than the succeeding. 
The proboscis is generally pale, with dark touches on 
maxille, accessory posterior plates, and other parts. The 
maxille (woodcut, fig. 5) have sharp, curved, dark points, 
Fig. 5. 
Dental apparatus of Onuphis near holobranchia, Marenzeller. x 35. 
and their accessory posterior plates are constricted, then 
dilated and pointed, so as to give them a regularly spathulate 
appearance. A bar of pigment separates them from the 
maxillz in front, another is between them, and a shade also 
occurs at the constricted region. The great dental plates 
are boldly toothed ; the right has eight teeth and the left 
seven. The accessory or azygos left plate has six teeth. 
