﻿CRUSTACEA JIAI.ACOSTRACA. 25 



short spine and on the outer side a short spine near the base; the left squama (fio;. 2e) has no spine 

 on the outer side, hut two short ones on the inner side, one near the base, tlie other about opposite the 

 centre. The sternum has two groups of bristles between the posterior pair of maxillipeds but no spines. 



The first pair of legs in the female are almost equally long, but the carpus and hand are 

 considerably thicker on the right leg than on the left (the right leg is wanting in the male); the 

 spiny equipment is well-developed, a distal spine on the inner side of the meropodite and a spine on 

 the centre of the inner side of the carpus being especially ver\' long; the others are easily seen from 

 the figure. The walking legs are relatively a little shorter than in the previous species; the spine- 

 equipment is well-developed, but while some of the spines, esijecially the long, are in rows, others 

 are scattered. 



The second segment of the abdomen is provided with numerous spines in both sexe.s, but 

 while in the female these are almost as long as on the posterior part of the carapace, the\- are obviously 

 shorter in the male; the rest of the abdomen is, as already mentioned, so different in the two speci- 

 mens that these must be described separately. In the male (fig. 2 f) the upper surface of the 3"' to 

 the 7"" segment is pro\'ided with many setigerous tubercles, some of which are almost like short 

 .spines; on each side of the y^ to the 5"' segments are fastened movable, naarginal plates 10 in all, 

 some of them \-ery small but each drawn out into a spine and sometimes also provided with a tubercle; 

 the lateral plate of the y^ segment has on each side three of these mo\-able, marginal plates, and 

 there is a fourth plate between the 3'''^ and 4"^ segments. There does not seem to be any spinous 

 tubercles between the middle plates of the segments. In the female (fig. 2g) the upper surface of the 

 3''<^ to the j^^ segments is covered by numerous, moderately long spines; the marginal plates of the 

 ^rd segment are completely fused with the lateral plate, so that the line of junction cannot be seen; on 

 the 4"^ segment the second marginal plate is completely ftised with the lateral plate, while the two 

 others are very mo\able and large; the marginal plates of the 5"' segment are all ver\' movable. 

 Between the central plates of the 3'""' — 4"' and 4"" — 5"' segments in the female there is a cross-row of 

 tubercles with spines but only a single tubercle of this kind between the central plates of the 5''' and 

 6"' segments. 



IMeasure meut.s. — Female. The length of the carapace to the ti]) of the longest process of 

 the rostrum is 43-5 mm., without the rostrum 34-8 mm.; breadth of carapace 34 mm., first right leg 

 (chela) on the upper side 61 '5 mm., on the under .side 66-5 mm.; the second right leg on the upper 

 side 80 mm., on the under side 85-5 mm. 



Wale; Length of carapace to tip of longest process of rostrum 2S7 mm., without rostrum 23 mm.; 

 breadth of carapace 21 mm.; the first and second legs on the right side are wanting, the third measures 

 on the upper side 52 mm., on the under side 57 mm. 



Remark. s. I have called this species after Profes.sor E. L. Bouvier, who has done such good 

 work in connection with the Decapoda and amongst these not least with the family Lithodidcc. 



16. Eupagurus Bernhardus L. 



1758. Cancer Bernhardus Linne, vS\'st. Naturte, Ed. X. ]>. 631. 

 ! 1844. Pagurus — Bell, Brit. Crust, p. 171, with fig. 



The Ingolf.Kxpedition. IH. j. 4 



