82 THE SCOTTISH NATURALIST 



a storm, and it lived for months in the laboratory till the introduc- 

 tion of an adult, which soon crushed and devoured it. All the 

 fishermen state that if a lobster enters a crab-pot first no edible crab 

 will venture in, though other lobsters do. 



Galathea squamifera, L. An important specific distinction, not 

 pointed out by Bell, is the occurrence of two small, sharp spines at 

 the base of the rostrum, one on each side of the middle line, and 

 best marked in the males both British and continental. These 

 are useful in separating it from G. dispersa, which has three on 

 each side of the middle line. Moreover, another feature not 

 mentioned by Bell is the presence of a prominent rounded tooth 

 on the dactylopodite, about a third of the length from the base. 

 The same author describes the limbs as covered with "small, scale- 

 like tubercles"- but it may be added that these are beautifully 

 arranged, gently rising from the level of the limb and ending in 

 what might be called a dentate edge, below which is a series of 

 hairs which form a fringe. 



Galathea strigosa, L. Besides the seven spines on the rostrum 

 mentioned by Bell, there is a small one at the base of these, and 

 two at the base of the rostrum, as in G. squamifera, but with two 

 or three others on each side, and they are set differently from 

 either of those of the form just mentioned in G. dispersa. 



Galathea dispersa. Bate. Amongst other features this species 

 is readily distinguished by a character not mentioned by Bell, viz., 

 the presence of about three spines on each side of the middle line, 

 and set rather closely together. 



Porcellana platycheles, Lamk. Bell's figure shows the posterior 

 pair of feet too slender, for the basal segment is much thicker than 

 the terminal ; the antennce are also longer. He states that the 

 carapace in the young is covered with short hairs, but such are also 

 present in the adult. No mention is made of the antennules, which 

 have very mobile bases springing from a large notch at the anterior 

 and inner corner of the carapace. This basal segment is followed 

 by an arched portion with two strong teeth on its anterior edge. 

 Some short, strong hairs occur on the inner side of the basal 

 segment, whilst on the outer are branched pinnate hairs. 



Lithodes maia, Leach. The carapace is minutely reticulated 

 all over superficially. Its hairs are very strong, and the surface 

 is infested with Balani, Sepulids, Anomi^e, Tubulipara repeiis and 

 T. patina^ Celleponi, and roots of zoophytes. 



