5S4 MRS. E. W. SEXTON ON THE 



the length of the outer ramus. The outer ramus is shorter than 

 the inner, both furnished with slender spines. In uropod 2 the 

 peduncle is almost as long as the outer ramus ; outer ramus 

 the shorter ; the spines are shorter and stouter than those of 

 uropod 1. I have figured uropod 3 in detail (figs. 23, 24, & 

 25), because it has been used by ISTorman (36, p. 89) as dis- 

 tinguishing the two forms. A comparison of the figures will 

 show the identity of structure. The outer ramus has a minute 

 apical joint carrying a long rigid spine, this joint being larger in 

 proportion in the young form ; the detail of the spines in the 

 small specimen (fig. 23) could only be seen with the Jjjth oil- 

 immersion. 



The Telson (figs. 27 & 28) is of exactly the same structure in 

 all the specimens ; lateral angles greatly elevated, each produced 

 to an acute point, each with 1 long spine and 1 short sensory 

 ciliated hair on the mai-gin, and 2 ciliated hairs underneath. The 

 subacute apex curves upwards also, but not to the same degi^ee 

 as the lateral angles. Figure 27 is taken from Ohevreux's speci- 

 men ; in two of Grube's, the tip was as represented in fig. 28, in 

 the thii^d, the lai'gest, it was as in fig. 27. 



Colour. — Grrube's largest specimen still retains its vivid colour, 

 a yellowish tint, with markings in dark brown. The dis- 

 tribution of the pigment agrees perfectly with Costa's figure (19) 

 pi. ii. fig. 8. The markings are composed of cloudy brownish 

 patches stippled thickly but iri-egularly with blackish-brown spots. 

 The dorsal part of the head is' covered with dai'k brown pigment, 

 shading into black near the eyes, these dark patches causing 

 the eyes to appear larger than they really are. The 1st perseon- 

 segment is plain ; the 2nd has only faint, patches, one on the back, 

 and one on each side ; the 3i'd and 4th with their corresponding 

 sideplates, and the 5th are thickly covered with the pigment, 

 arranged in a band along the middle of the segment ; the 6th is 

 plain ; the 7th and the first 3 pleon-segnients with their epimera 

 ai-e darkly pigmented ; the 4th pleon-segment has a faint patch 

 on each side ; the lest of the animal is plain. The general eflfect 

 is very striking, the animal showing a dark head, 3 dark rings 

 anteriorly, and 4 farther back. The amount of colour probably 

 varies with the locality. Walker, (48) p. 310, describes it as 

 " deep yellow, with transverse brown lines on all the segments." 



Distribution. — This species has a very wide distribution : — 



Shetland Isles : Norman (34) p. 283, as Protomedeia pectinata ; 



dredged ; St. Magnus Bay, deep water. 

 Irish Sea : Walker (48) p. 310, as Leptocheirus pilosus ; 



dredged ; 1 7 fathoms. 

 W. & S. Coasts of Ireland : Walker (50) p. 169, as Leptocheirus 



pilosus ; 40 fathoms ; bottom deposit, gravel. 

 Channel Islands : Walker & Hornell (49) p. 54 ; as Lepto- 



cheirus pilosus Zadd. = Z. jjectinatus Norman; 7 fathoms; 



bottom deposit, gravel, clinkers, and shells. Chevreux (16) 



