CYCLOPS. 201 



e 



largest of which is terminated by two or three strong 

 horny teeth. The posterior or second pair of foot-jaws 

 (t. XXIV, f . d, e) are divided to the base into two parts ; the 

 internal (f. e), which J urine (who calls these organs hands) 

 compares to a thumb, is much smaller than the other, and 

 is formed of three articulations ; the first of which, much 

 the longest, has on the inner edge several rather strong, 

 plumose spines, or setae ; the second, very short, sends off 

 one long spine ; while the third, which is the smallest, is 

 terminated by three spines. The external division (f. d) 

 is also composed of three articulations, at the base of 

 the first of which is attached the thumb ; this joint is 

 much the longest, and has on internal side two tubercles, 

 from each of which issues a plumose spine, while a third, 

 longer, springs from near its articulation with the second 

 joint. This second joint is in form of a strong claw, and 

 has attached to its upper edge the third joint, in form of 

 a claw also, but much smaller than preceding. These 

 claws are called fingers by Jurine. 



The feet are ten in number, or five pairs. Four pairs 

 spring from the four thoracic rings, and are all alike. 

 Each foot is double, or composed of two branches, arising 

 from a common base (t.XXIV,f./) ; each branch consists of 

 three articulations, and each articulation is furnished with 

 plumose setae, the terminating one having six or seven. 

 The first segment of the abdomen is very small, and has 

 the fifth pair of feet (t. XXIV, f. y] attached to it. These 

 are quite rudimentary, and differ in the two sexes. In the 

 female it consists of a short body, of two segments ; the 

 first broader, and giving off from its outer edge a sharp 

 spine ; the second narrower, giving off from its internal 

 edge a short spine, and terminating inferiorly in a long, 

 slightly-curved spine. These organs are what Jurine 

 describes as the "fulcra, or supports." In the male they 

 consist of an oval body, composed of three segments, 

 diminishing each in size as they descend, and terminating 

 in a sharp, prolonged point. These were considered the 

 male organs by Jurine. The second is the largest. 



