iHH. PROCEEDINGS OF THE XATWXJL MUSEUM. 531 



base, aiidalso equals the greatest width of the carapace. The greatest 

 width of tlie abdomen is about one-tenth greater than tlie length of the 

 carapace. The eyes are of somewhat different ijroportions in the two 

 specimens before nve, for in the female the corneal axis exceeds the 

 peduncular one by 0.43 of its length and is 0.068 times the length of the 

 body, while in the male the corneal axis exceeds the other by only 0.15 

 and is 0.060 times the length of the body. 



The rostrum is narrowed and rounded in front, and besides the mar- 

 ginal carina^ has a prominent median carina in its anterior half. The 

 carinte on the carapace are very mcII 

 marked, and the cervical suture is very dis- 

 tinct. At each of the anterior lateral angles 



the lateral carina is continued into a strong ^ -C " ^^^ \/- - . ^ / ff 



projecting spine. There is a marked exter- 'T>p J '•^' ■ '^f'^>!^5r 



nal angle on each posterior lateral lobe. lU'' V; I* ••''H 



Subniedian and lateral carina^, are present ly'-/.'- ''A^'^.- ':-''''-^ 



on all the exposed thoracic segments. The i f %//'.', \i 1/ '■■ ■ . ' ; ^ I 



first one has a strong, acute pair of ventral 'l "■ -l! V , ' ■ ' 1^ 



spines, besides the sickle-shaped lateial \f***%i^ V \a#^/ 



spines. The lateral processes of the next %^\f 



two segments resemble those of S. biformis, 

 but are more acute. The abdominal carina' ■^'^' ^^" 



are very prominent and the spines are strong telson of squilla intekjiedia. 



and sharp. There is a small spine in front of ''"''■ "'""'" "°'"^"^- 



the articulation of the uropod. In the male 



the njarginal carin;e are very slightly thickened. The telson of the 

 female is very similar to that of the female aS'. hiformis. The crest rises 

 gradually from the general surface, which is smooth except for about 

 a dozen curved lines of very shallow pits, the lines brauching at the 

 periphery. The carinte at the bases of the marginal spines are small 

 and low. There is also a pair of anterior lateral carime separated from 

 the posterior pair by only a slight dorsal notch. There are slight ele- 

 vations at the bases of the denticles. This specimen differs from a 

 female of S. biformis in having fewer and larger denticles on the telson, 

 larger marginal spines, a higher crest, and no spine on the short ven- 

 tral keel. In the male (tig. 19) the crest andthe margin of the telson 

 ai e much thickened on the dorsal side. But it differs from the male 

 S. hiformis in having the marginal ridge interrupted in two places on 

 each side. One of these marks the end of the anterior lateral carina, 

 and the other is just behind the lateral denticle. Except for these, 

 the ridge is smooth and continuous and therefore quite different from 

 the condition found in iS. panaineiisis. 



The basal prolongation of the uropod is finely serrated on its inner 

 margin, and the inner spine has a rounded lobe in the middle of its 

 outer side. The proximal joint of the exopodite is but a little longer 

 than the distal one and bears seven movable spines. The eyes are large 



