402 



THE INVERTEBRATA 



the 7th to the ist thoracic somite. The young are born with all their 

 legs. The females with young are carried by males. After they have 



inc., 

 la.vio.- 



spi.- — ''"/4 



mol. 



A hr. 



Fig. 279. Fig. 280. 



Fig. 279. Mouth parts of Gammarus. A, Mandible. B, Maxillule. C, Maxilla. 

 D, Maxillipeds. en. endopodite; inc. incisor process; la.?fio. lacinia mobilis; 

 mol. molar process;/)//), palp; spi. spine row; 1-3, segments of limb. 

 Fig. 280. A diagram of a transverse section through the thorax of Ga?nmartis. 

 br. branchia; bp. basipodite; cp. coxopodite; cp.' coxal plate; g. gonad; 

 h. heart; hep. "hepatic" coeca; int. intestine; n. nerve cord; 00. oostegite. 



th.3. 



Fig. 281. Caprella gra?tdimana. From the Cambridge Natural History, after 

 P. Mayer, ab. abdomen; br. gills; th.2, th.H, thoracic somites. 



parted with the young they moult and are immediately re-impreg- 

 nated. When the cuticle has set they are liberated. 



Caprella (Fig. 281), slender-bodied and living upon seaweeds, 

 hydroids, etc., has two thoracic somites in the cephalothorax, no legs 



