I. '08. 149 ■ 



short ridges, the foremost of which is very obscure, on the 

 posterior part of the carapace between the first and second 

 lateral carinae. The whole carapace is covered with a short 

 and close pubescence. 



Abdominal somites all strongly sculptured laterally and dor- 

 sally, the raised portion being glabrous and the depressions 

 pubescent ; pleura of the first four bluntly pointed below. 

 First two somites dorsally rounded ; third, fourth and fifth 

 sharply carinate, sixth bicarinate. The carinae of the third, 

 fourth and fifth somites, when closely examined, show faint 

 traces of bicarination, this, however, is not so pronounced as 

 is the case vvith P. echinulatus . Inner uropod considerably 

 longer than the outer and about equal in length to the deeply 

 grooved telson. 



Basal joint of antennular peduncle longer than second and 

 third combined, its distal end reaching somewhat beyond the 

 anterior portion of the subquadrate lateral process ; second 

 joint about equal in length to third. Antennal scale (fig. 6 b) 

 about two and a half times as long as broad, its outer edge 

 slightly concave and bearing at about its middle a stout spine, 

 in this feature differing from all other European and perhaps 

 from all known Crangoriidae. The apical spine reaches 

 beyond the lamella of the scale. Merus of first pereiopods 

 not furnished at its outer distal edge with the spine which is 

 present in all other members of the genus. 



Colour in life. — Extremely variable. Gosse (1853, p. 155) 

 gives a close description of two forms. In one specimen 

 noticed on the Helga the carapace and oral appendages 

 were pale yellowish buff, with a minute blue spot in the mid- 

 dorsal line of the former near the posterior edge. The first 

 four abdominal somites were umber brown with whitish 

 mottling, verging to maroon laterally, and with a few pale 

 sienna spots; the last two somites and the telson were pale, 

 with very faint sienna markings. Another specimen was of a 

 general brick-red colour, with minute darker dots; others had 

 an umber brown carapace with a whitish abdomen , some pos- 

 sessing in addition a transverse umber band across the proxi- 

 mal portion of the fifth abdominal somite ; others again were 

 uniform umber brown, with the exception of the sixth ab- 

 dominal somite and the telson, which were whitish. One 

 example showed a type of coloration closely resembling that 

 of P. tfispinosus, the carapace and abdomen being very pale 

 mottled grey, verging to a dark maroon laterally. 



Size. — The largest specimen observed measures 24 mm. 



General distribution. — P. sculptus has been recorded from 

 the Adriatic (Heller), Finistere (Barrois), Guernsey (Norman) 

 and off the coasts of Devon and Cornwall (Bell, Norman, etc.). 

 Off the west coast of Scotland it is known from the Minch and 

 Lamlash Bay (Norman) and from the Firth of Clyde 

 (Patience) . 



