REPORT ON THE AMPHIPODA. 1273 



perseopods] strongly developed. Inner rami of the uropoda coalesced with the peduncles. 

 Peduncles very long and broad." 



To this may be added the seemingly unique character, that the first maxillae have the 

 outer plate apically divided. 



Scind comigera (Milne-Edwards) (PI. CXLVL). 



1830. Hyperia comigera, Milne-Edwards, Ann. d. Sci. Nat., t. xx. p. 387 (extr., p. 36). 

 18-10. Tyro comigera, Milne-Edwards, Hist. Nat. des Crustaces, t. iii. p. 80. 

 1850-52. Clydonia gracilis, Dana, Proc. Amer. Acad. Arts and Sci., vol. ii. p. 219. 



1852. ,, „ Dana, U.S. Explor. Exped., vol. xiii. pt. ii. p. 834, pi. lv. fig. 6, a, b. 



1862. „ „ Spence Bate, Brit. Mus. Catal. Amph. Crust., p. 284, pi. xlvii. fig. 8. 



1862. Tyro comigera, Speuce-Bate, Brit. Mus. Catal. Amph. Crust., p. 308. 

 1887. ,, „ Bovallius, Systematical List of Ampli. Hyper., Bihang till K. Svensk. 



Vetensk. Akad. Handl., Ed. 11, No. 16, p. 3. 

 1887. ,, gracilis, Bovallius, Systematical List of Amph. Hyper., Bihang till K. Svensk. 

 Vetensk. Akad. Handl, Bd. 11, No. 16, p. 4. 



The specimens belonging to this genus were all hard and more or less shrivelled, as 

 though by some accident they had become dry before being put into spirit. Hence 

 some of the details have been made obscure or doubtful. There seems to be a minute 

 rostrum ; the back of the peraeon is rounded and probably also that of the pleon, but, if 

 appearances may be trusted, the centre of the back is angled throughout except at the head 

 and telson ; of the pleon-segments the first two appear to have the postero-lateral angles 

 but little rounded, whfle in the third these angles seem to be more strongly rounded ; 

 the fifth and sixth segments are completely coalesced, except that the fifth is sufficiently 

 wider than the sixth to admit the attachment of a uropod on either side to the projecting 

 hind margin ; the following uropods occupy the whole hind margin of the sixth segment. 



The Eyes are small, situate on the sides of the head, composed of nine ocelli. 



Upper Antennae very large, a little less than two and a half times as long as the 

 elongate first uropods ; the peduncle consists of one thick cylindrical joint, nearly as broad 

 as long ; the flagellum, at its base nearly as broad as the peduncle, tapers gradually to 

 the distant apex ; in section it is almost prismatic, the two lateral edges and the lower 

 one being all armed with little spine-like teeth ; on the inner margin at the proximal end 

 there are some cilia or thread-like spines ; at the distal end there is a faint show of 

 division into three or four joints, but in the condition of the specimens this cannot be 

 spoken of with any certainty, being probably only due to cracking or shrivelling. In the 

 male, fig. a.s. A., the proximal half of the flagellum joint has a tolerably strong brush of 

 filaments. 



Lower Antennae in the female very small and slender, placed close behind the upper, 

 the base being a broad joint more or less adherent to the wall of the head, accompanied 

 by a tolerably conspicuous gland-cone ; the next joint is small, cylindrical, a little longer 



(ZOOL. CHALL. EXP. — PART LXVII. 1888.) Xxx 160 



