136 COE 



Habitat. Several feet below low-water mark on piles of wharf, 

 San Pedro Harbor, Calif. ; not common. Only sexually mature females 

 were obtained. 



2. CARINELLA ALBOCINCTA sp. nov. 



pi. xvi, figs. 4, 5. 



Body rather stout for genus, but can become much more elongated 

 than the figures indicate ; not much flattened, rather firm, less soft than 

 in C. rubra or C. frenata. Head of moderate size, of variable 

 shape, broader than neck, from which it is demarcated by an annular 

 constriction. When body is strongly contracted, however, the anterior 

 portions become much swollen and wrinkled, and the head withdrawn 

 into the body until it is partially hidden from view from above. A 

 pair of very shallow transverse grooves lie on the lateral margins of 

 head, just in front of neck. Esophageal region rounded, intestinal 

 region not much flattened, posterior extremity not slender. 



Proboscis pore subterminal ; proboscis rather small. Mouth situ- 

 ated just back of annular constriction marking the neck, of variable 

 size according to state of contraction of body. 



Color. General color of body usually a beautiful cherry red, some- 

 times inclining to brick red, and sometimes to purplish red, with a series 

 of narrow, pure white rings. These rings are all very narrow, hardly 

 thicker than a thread, though some are much finer than others and are 

 merely indicated as very delicate hair lines. They are placed at vary- 

 ing intervals throughout the length of the worm, and most of them 

 completely encircle the body. There may be 50-100, or more, in a 

 large individual. 



Tip of snout provided with a narrow, terminal border of white, 

 which reaches back along the lateral margins of head for a little dis- 

 tance. This terminal white border extends to ventral surface, where 

 it is fully as conspicuous as from above. When head is extended and 

 obtusely pointed the white marking is angular, and extends back on 

 the lateral margins for about half the length of the head. In the angle 

 of the marking, on the ventral surface, lies the proboscis pore. When 

 head is contracted strongly the terminal white border appears merely 

 as a short transverse marking on each side of the proboscis pore. 



The first white ring lies on the constricted neck portion, and is 

 interrupted by the mouth (pi. xvi, fig. 5), so that it is incomplete ven- 

 trally. The second ring is commonly separated from the first by two 

 to three times the width of the body. This ring is short and complete, 

 but is thinner ventrally than on the dorsal surface. The third ring is 

 about half as far behind the second as the latter is from the first. Then 



