276 Messrs. J. Wood-Mason and A. Alcock on 



Edw.) also is without branchiostegal spines, and, moreover, 

 has the telson simple and miarmed. ' 



The branchial formula is the same in both species, 

 namely : — 



Somites aud Arthrobrauchite. 



their Podo- , '^ ., Pleuro- 



appendages. braiichitie. Anterior. Posterior, braiichife. 



VIII 1 1 1 = 8 



IX {ep.) 1 1 1 = ll+ep. 



X {ep.) 1 1 ] = 3 + e/;. 



XI {ep.) 1 1 1 = ?>+ep. 



XII {ep.) I I 1 = 3+t7>. 



XIII {ep.) 1 1 1 = i^^ep. 



XIV 1 = 1 



1 + 5 ep. + 6 + 6 + =19+5e/>. 



Parasolenocera, gen. nov. 



Carapace grooved as in SoIenocerOj furnished with supra- 

 orbital, postorbital, and hepatic spines ; without post-rostral 

 ridge. Abdomen narrow and elongated, with a conspicuous 

 hump, giving to the body a decided wasp-waisted appear- 

 ance, dorsally carinated from the base of the third tergum to 

 the apex of the last — the carina very distinctly and in- 

 creasingly cristlform from the base of the fourth to the apex 

 of the last, where it ends in a sharp decurved spine. Telson 

 trifurcate, as long as the swimmerets. Flagella of antennules 

 foliaceously expanded, tapering gradually to a very fine seta- 

 ceous point, the inner much the broader aud a little the 

 longer, ensheathing the outer. 



This genus forms a connecting-link between Solenocera on 

 the one hand and IlymenopenceuSj PMlonicus^ and IIaliporu» 

 on the other. 



9. Parasolenocera annectens, sp. n. 



The strongly ascendant and very sliglitly upcurved rostrum 

 is regularly and rather gradually produced to a very sharp 

 point, which reaches almost to the end of the penultimate 

 joint of the antennulary peduncle. It is armed with a 

 decreasing series of eight excessively acute teeth, the first of 

 which is placed on the gastric region and about as distant 

 from the second as this is from tlie fourth of the series. 



The first branchiostegal spine when viewed from the side 

 presents itself as a stout, compressed, acute, triangular pro- 



