found on the South Coast of Devonshire. 6'7 



are two long arms, with very large oblong-oval hands, furnished 

 with a strong spine on the inside, and a long moveable fang, 

 which is capable of closing upon the spine, in order to secure its 

 prey : the front of the hand in some is also narrowed and elon- 

 gated into a spine; the second and third joints of the body are 

 each provided with a pair of flat oval fins ; the three posterior 

 joints are each furnished with a pair of long, slender legs, with a 

 single hooked claw ; the hindmost are the longest, and originate 

 from the extremity of the body, the animal being destitute of 

 tail. 



Length rarely exceeds three quarters of an inch, and seldom so 

 much : colour various, sometimes red, but more commonly pel- 

 lucid olive green. 



The female differs in possessing several plates, or valves, be- 

 neath the body, situated between the two pairs of fins: the office 

 of these is to carry and protect its eggs or young, at which time 

 they extend very considerably, and form a kind of pouch. We 

 have seen this receptacle distended with ova from fifteen to 

 twenty, readily distinguished through the transparent plates. In 

 this part a very strong pulsation is observable. 



While examining a female in a watch glass of sea water under 

 a microscope, we were agreeably surprised to observe not less 

 than ten young ones crawl from the abdominal pouch of the pa- 

 rent ; all perfectly formed, and moving with considerable agility 

 over the body of the mother, holding fast by their hind claws, 

 and everting their heads and arms. 



On a small species of Fiteus (the name of which was not noted) 

 a vast number of these curious insects were collected, of both 

 sexes, and of all sizes. When at rest they only held by their hind 

 claws: in motion, the arms were also used, and the progression 



k 2 was 



