(36 Guide to Cnisfacea. 



Table-case elevated on the l)ack. One of the specimens exhibited, taken in 

 tlie Bristol Channel, carries as a cloak a specimen of the sponge 

 Clionc cclata. In the family Diinomcnidac, represented by the 

 little Dijnomcnc kispida, only the last pair of legs are reduced and 

 elevated on the back. 



Latreillia clegans belongs to the aberrant family LuticiUiiiJac. 

 In the triangular shape of the carapace and the length and slender- 

 ness of the legs, the members of this family show a certain 

 similarity to the Spider Crabs of the Tribe Oxyrhyncha. 



To this group also l)elongs the family Homolidac, a typical 

 example of which is the large Ho mola (Paromola) cuvieri (Fig. 45), 



Fig. 45. 



Jhnnolii curicri. The carapace of this specimen is iil)out seven inches long. 

 [Wall-case No. 5.] 



exhibited in Wall-case No. 5. This species has occurred, very 

 rarely, on the west coasts of Ireland and Scotland. 



The members of the family Prosoponidae are only known as 

 fossils, but it has recently l)een shown that they are closely allied 

 to the living Dromiacea, especially to the deep-sea Homolodromiidac . 

 They range from the lower Oolite to the Upper Cretaceous. A 

 cast of the carapace of Prosopon mmmnillntum illustrates this 

 family. 

 Table-case The members of the tribe Oxystomata, somethnes known as 

 No. 13. a Sand-Crabs," may be recognised by the triangular shape of the 

 mouth-frame, wiiich is narrowed in front and extends forward 

 between the eyes. The channels which carry the outward stream 



