123 



2_ 2 



— ~ — one specimen, — - — one specimen (female withont eggs). 



We cunclude tVom this list that — ^ and - - — are the 



o o 



most common formnlae and that the npper margin is usnally 

 arnied witli <'i<ilif teeth, not eounting tlie apieal tooth, for this 

 number oceurs in 25 specimens, i. e. in 46 per cent. In 17 spe- 

 cimens, i. e. in 31 per cent., i^even teeth were observed, nine teeth 

 were rather rare, viz. in 18 per cent., while rostra witli xix or 

 five teeth are a quite rare exception. Almost as a rnh3 fhrer teeth 

 are observed on the h)wer margin, viz. in 92 per cent. of all the 

 specimens, only one adult female presented four teeth and two 

 teeth were only seen in 3 young specimens. In 45 of the 54 

 specimens, i. e. in 83 per cent., the rostrnm presented one single 

 apieal tooth, only in 5 specimens, i. e. in 9 per cent., two apieal 

 teeth did occnr, in 3 there was no apieal tooth at all and in 

 one young male the nine teeth were situated regularly to the 

 tip. Almost i/enera/li/ fhm' teeth are situated on the carapace 

 hehind the orbital margin, namely in 43 specimens, i. e. in 80 

 per cent. ; the 4th tooth is then situated either immediately be- 

 fore or just above that margin; rarely, viz. in 10 specimens, i. e. 

 in 18 per cent., only tivo teeth were situated on the carapace 

 and the 3d jmf ahovc the orbital margin. The rostral teeth much 

 resemble those of L. I(»ir/irostns (H. M.-Edw.), but, while in 

 this species the 2d tooth is invariably one and a half as far 

 distant from the Ist as the 2^1 froni the 3d, in L. Squilla the 

 2d tooth is almost constantly situated Just tiddivay between the 

 Ist and the 3d, rarely, as in two egg-bearing females from the 

 Svendborg Sund, the 2d tooth is a little farther distant from 

 the 3d as from the Ist and only in one single young male from 

 the same locality the 2d tooth proved to be one and a half as 

 fa'r distant from the Ist as from the 3d, like in L. long trost ris. 

 The following teeth of the upper margin are placed usually a 

 little closer together, often the foremost one excepted, and the 



