found on the South Coast of Devonshire. 91 



large tumid pouch in the female, composed of two broad dia- 

 phanous membranes that collapse. This abdominal pouch in 

 the month of July was filled with minute embryo young, whose 

 eyes, being nearly as large as their bodies, were visible through 

 the membranous receptacle, and gave it a spotted appearance. 



Length an inch and a quarter. 



This is sometimes taken amongst prawns at Salcomb, and in 

 the estuary of Kingsbridge ; but never having seen any alive, 

 I could not ascertain the colour. After passing through the 

 operation of boiling by accident with the other species, it is of 

 a pale colour, with some spots of dusky, particularly at the 

 joints along the back. Both sexes are alike, except that the 

 male is destitute of the receptacle on the abdomen. 



By means of the accurate pencil of Mr. Henry Boys, who 

 favoured me with drawings of many of the marine animals 

 found at Sandwich, I have been able to identify this crab as an 

 inhabitant also of the Kentish coast 



It appears to differ from the generality of this division of Can- 

 cer by the manner of carrying its young ; and I suspect, if it be 

 not viviparous like those of the division Gammarus, it retains 

 its young for a considerable time after they are excluded ; a 

 circumstance unusual in the lobster tribe. 



Cancer Astacus gibbosus. 



Tab. V. Fig. 4. 



Body slender, incurvated, with six joints: thorax smooth; 

 proboscis long, laterally compressed, serrated ; a small spine 

 on each side the base of the proboscis, and another beneath 

 each eye ; antennae four, upper pair shortest, bifid ; lower pair 

 single, nearly as long as the body: two anterior ciliated plates 



n 2 as 



