76 



Part III. — Tvjcnty -third Annual Report 



The endopodite consisted of four joints ; that is one less than what it 

 has later, and which the first stage specimen dissected by Herrick had. 

 The first long joint in the present case showed a trace of division into 

 two. 



The armature of the endopodite consists of serrated thorns resembling 

 those on the same appendage in the VI. and VII. stages of Crangon. So 

 far as was made out, they were, without exception, serrated. The serra- 

 tions are minute, except in the large thorns. In fig. 29 the teeth are 

 exaggerated. 



Third Maxillipede, Snip., figs. 8 and 16. 



Two gills and an epipodite are attached to the first joint of the pro- 

 topodite. One of the gills is a podobranch, the other an arthrobranch 

 (fig. 16). On the edge of the epidodite there are three hooks, of which 

 the two larger are anterior. There is a second arthrobranch. 



The exopodite had two terminal setae and ten on each side. The 

 annulations on the exopodite appear to be complete joints. 



The endopodite has five joints. The spines are, almost without excep- 

 tion, serrated. Those on the under-surface (of the sketch) have two rows 

 at least of large teeth ; the other spines have small serrations, of which 

 there are two rows at least. The long terminal spine has very few ser- 

 rations. 



Pereiopods. 

 The pereiopods drawn are all of the right side. 



The pereipod consists of seven joints, viz. (1) first protopodite joint — 

 Coxopodite ; (2) second protopodite joint — Basipodite ; endopodite 

 joints, viz. (3) Ischiopodite ; (4) Meropodite ; (5) Carpopodite ; (6) 

 Propodite ; (7) Dactylopodite. 



The setose exopodite arises from the basipodite. 



First Pereiopod, /per., figs. 11, 20, and 28. 



There are four gills connected with this limb — a podobranch, two 

 arthrobranchs, one pleurobranch, and an epipodite. 



The endopodite has five joints, but the distal limit of the ischiopodite 

 is shown by a line merely across the limb ; it is not a movable junction. 



On the propodite the spines, almost without exception, are serrated ; 

 those on the same side as the dactylopodite have prominent serrations, 

 those on the opposite side very small serrations. 



There were 22 or 24 setaa on the exopodite. 



Second Pereiopod, 2per., figs. 22, 21, 12, and 15. 



As in the preceding, appendage the first joint on the endopodite is 

 marked by a line crossing what would otherwise be a first long joint of 

 this branch ; giving five joints in all. The hand has serrated spines ; 

 those on one side having larger serrations than those of the other side. 

 There are three teeth on the inner edge of the dactylopodite. 



There were 24 setae on the exopodite. 



Four gills and an epipodite are connected with this limb. 



Third Pereiopod, Sper., figs. 13, 17, 25, and 26. 



The endopodite is incompletely segmented ; it has four joints. 

 The spines on the claw of the propodite have large serrations. 

 The exopodite had 24 (26) setae. 



Attached to the appendage are four gills and an epipodite, 



