CHAP. IL] FROM PORTSMOUTH TO TENERIFFE. 131 
The male example figured (Fig. 27), which is 103 mm. in 
length, was taken in lat. 1° 22’ N., long. 26° 36’ W., a little to 
the east of St. Paul’s Rocks, where the depth was 1500 fathoms. 
Fic. 27.—Cystosoma Neptuni, Gouertn-MENEVILLE. Slightly reduced. (No. 107.) 
The animal presents a very remarkable appearance. It is 
absolutely colorless and transparent, so that by transmitted 
light the internal organs can be perfectly seen through the test 
—the cephalic ganglion with the nerve-fibres running to the 
antennee and the eyes; the ganglia of the double ventral cord 
with the filaments passing to the appendages; the heart, an 
