82 INVERTEBKATE ANIMALS. 



medium of nearly its own specific gravity. A 

 closely allied species is the colossal Macro- 

 cheira Kcempferi of Japan, having by far the 

 greatest span of any Crustacean. It is said 

 to live amongst broken rocks, and to feed on 

 Star-fishes : its long arms, with a span of 

 nearly eleven feet, enabling it to pluck its prey 

 even from the deepest crevices. (See Case 

 over the north door.) Presented by James C. 

 Fraser. Examples of Stenorhyncus, Eury- 

 podius, and other genera. 



S^ijaiteent^ Cable €rbl 



The Mark *,] indicates specimens or other illustrations exhibited in the Cases. 



As far as the end of the Eleventh Table Case, and in the folloiving 

 portion of the series, the tablets have been completed; and from 

 them occasionally a paragraph has been inserted in this Synopsis, 

 but sparingly, to avoid unnecessary bulk. 



Group 193.— Class MYRI APODA. /xup»«c, 10,000; ttovs, a 

 foot. The animals of this class have comparatively few 

 segments when first hatched. The head is distinct, and 

 in the Centipedes is armed with poisonous fangs. The 

 remainder of the body is made up of nearly similar 

 segments. Respiration is by tracheae. 



Allied form PERIPATUS. "This is an animal 

 of the very highest importance and antiquity, and I 

 believe it to be a nearly related representative of the 

 ancestor of all air-breathing Arthropoda, i.e., of all 

 insects, spiders, and Myriapods." (H. N. Moseley, 

 F.K.S.) The short disconnected tracheae are scattered 



