140 BULLETIN: MUSEUM OF COMPARATIVE ZOÖLOGY. 
In a specimen in which two small quadrants are adjacent, there 
are only six otoliths. Taking the two smaller quadrants first, the 
formula is 
0723. 15:8, Opb bt 5001: 101 
The last quadrant is the largest. 
The formula of another specimen, with unequal quadrants, is, 
„ 
This shows only four otoliths, one quadrant without any, and two with 
only one. 
In a similar specimen with a formula of 
le s 11; 12,1, 105 SEDES 
there are only six otoliths, with three normal quadrants, one not having 
any sense organs. 
In a specimen with two adjoining radial canals forking below the 
genitals, making four quadrants with two small seotors cut out of two 
of them, there are ten otoliths, the formula being 
— — oe 
VVT 
In a second specimen, forking similarly at the extremity of one radial 
canal, the formula was 
— — 
VVV 
In a specimen with an eccentric digestive cavity and quadrants un- 
equally developed, the formula is 
La e Ta Beel aD 
or only five otoliths, neither the first nor the third quadrant having 
otoliths, while the fourth has two side by side. 
In a specimen with equally developed quadrants, but with a long 
spur above the genitals at right angles to the radial canal, barely reach- 
ing the marginal canal, the formula is 
7 f. - 7 Q 
VVV 
there being three tentacles between the fork (spur) and the nearest 
canal. 
In a very irregularly developed specimen, with the formula 
CCC 
there were only three otoliths. 
