224 



LIFE BY THE SEASHORE. 



Sub-class ENTOMOSTRACA. Body usually with few segments. 

 Order CIRRIPEDIA, including parasitic (Sacculina), and degenerate 

 sedentary forms (Balanus). 



There are very many other kinds of Crustacea, especially of Ento- 

 mostraca, not alluded to in the previous chapters on account of their 

 small size, or rarity, or absence from the shore. 



PYCNOGONIDA, OR SEA-SPIDERS. 



A small group of uncertain affinities. Four pairs of walking legs, 

 abdomen rudimentary, without appendages. 



No other appendages 

 except four pairs of 

 legs in female, male 

 with slender egg- 

 bearing legs . 



Chelipeds present near 

 mouth, in female no 

 other appendages 

 except the legs, in 

 male egg - bearing 

 legs as before 



Chelipeds and two 

 other pairs of appen- 

 dages near mouth in 

 both sexes 



Legs stout and re- /-Colour yellowish 

 latively short ! white P. lit- 

 Pycnogonum . ^ lorale. 



( Legs about three 

 Legs very slender I times as long as 

 and long Phoxi- \ body. Colour 

 chilidium . . \ pink P. femora- 

 turn. 







Legs very long and 

 slender Nym- 

 phon . 



ver well definecL 



