v AMPHIPODA LAEMODIPODA 139 



Fam. Talitridae. This family may be distinguished by the 

 absence of a palp on the mandible, and by one ramus of the 

 uropods being very small or wanting. The various kinds of 

 " Sand-hoppers " belong here, familiar creatures on every sandy 

 coast between tide-marks. The genera T<tlitrn$ and Talorchestia 

 always frequent sand, while Orchestia is generally found under 

 s and among weed. Some species of Orchestia, e.g. 0. //"//>- 

 s, live inland in moist places at some distance from the 

 sea ; one species of Talitrus (7'. si/1 m //>//.) occurs at great eleva- 

 tions in forests in Southern Australia. 



Hi/nil' is a coastal genus, and is also found on floating objects in 

 the Sargasso Sea. Hiil?H is confined to Lake Titicaca and the 

 fresh waters of South America, i'ltiltnii'm from S. Australasia. 



Fam. Corophiidae. The members of this family have a 

 rather flattened body and small abdomen, and the side-plates on 

 I lie thorax are small. The uropods are also small and weak. 

 Some species of the genus C i-<>j>// /'///// are characteristic of the 

 ( 'a<pian Sea. 



Sub-Order 2. Laemodipoda. 







Fam. 1. Caprellidae a are also chiefly littoral forms, swarm- 

 ing among rocks covered by algae, though they are by no means 

 so easy to detect as the Gammaridae and Tanaidae which haunt 



t' 

 ...--a 



FlO. W. < 'n/n-rlln i,-'iiidiiii<(iui. : i. c, AMniuri] : (j, mlU : /, :lnl lir- i 

 tlinnii-ii- "jinciit : /', Stli tlionn i>- segmi nl. Alt' i I'. M 



similar situations. In a basinful uf al;_;ae of I'lilv/nii i.iken from 

 the rocks fringing the I'>ay of Xaples. the latter are easily collected, 



the Tanaitlae always erawlin-j; out of the \\eeils in the ilin-etion 



^ 



of the light, while the (iammarids dart about in all directions: 

 but the Caprellidae, \\ith their branching stick -like forms, 



CI'. 1'. MayiT. Fm/nii u. b'1,,-,1 I!. ., gel, Monogr. vi.. 1 ^'J : xvii., 189 



