272 Rev. Canon Norman — A Month on 



This is protably the smallest Maciuran known, measuring 

 only about 13 niillini. long. 



Outer maxillipcds (fig. 4) strongly developed, with a small 

 palp at the base, last joint longer than penultimate, on the 

 anterior side furnished with semiverticils of setae, extremity 

 terminating in a very strong triangular spine, at the base 

 of which is projected to about one third of its length a 

 dentated lobe. First feet very short (fig. 5), hand greatly 

 elongated, nearly twice the length of the wrist, attenuated 

 distally, the finger and thumb extremely small and weak. 

 Second feet slender and weak ; wrist longer than the anterior 

 portion of limb, composed of seven articulations ; hand very 

 minute and the chela so small that it can only be seen when 

 the limb is mounted and microscopically examined. Re- 

 maining feet simple. The front portion of the carapace is 

 dorsally keeled and spined, spines about four; rostrum 

 (fig. 3) about half as long as the carapace, nearly horizontal, 

 narrow, above with " 8-12 " spines, beneath unarmed, except 

 sometimes a small tooth at the apex. No spine over the eye, 

 but three minute spines below. Antennal scale elongated, 

 rhomboidal, with a spine about the middle of the outer 

 margin. Epimera of first three segments of pleon very 

 large in the female, especially the second. Telson shorter 

 than uropods, elongated-ovate, with numerous spines on the 

 sides, distally truncate, and furnished with six spines. 

 " Branchiae utrinque 5 structura singulari, laminas formantes 

 ovatas in superficie modo exteriore plicas 4-7 ut rudimenta 

 foliolorum prgebentes; branchia posterior ceteris major et 

 forma subreniformi " {G. 0. Sa7-s). 



Both ByiJiocaris and Cryptocheles have only a few ova, 

 and these are very large ; and G. 0. Sars has recorded that 

 in these genera the young issue from the ag^ with the full 

 complement of limbs, and do not undergo any metamorphosis 

 subsequently. Thus these genera differ from all shallow - 

 water Macrura. In most deep-water ]\Iacrura the eggs are 

 few and large, and it is probable therefore that the develoj)- 

 ment is similar in character to that of Bythocaris and 

 Cryptocheles. [Notes by Prof. S. I. Smith on the large size 

 of the eggs of abyssal Crustacea will be found in papers 

 printed in Ann. & ]\lag. Nat. Hist. ser. 5, vol. xiv. 1884, 

 p. 183 ; " Report Decapod Crustacea ' Albatross ' Dredgings, 

 1884," in Ann. Rep. Comm.Fish and Fislieries, 1885 (is8()i, 

 p. 13 (separate copy) ; Ann. & Mag. Nat. Hist., ser. a, 

 vol. xvii. 1886, p. 197.] 



13. Pandalus hrevirostris^ Rathke. 

 Rodberg, 150 fathoms. 



