22 



3. Hemilamprops rosea (Norman). 



(PI. XII, XIII, XIV.) 



Vawithompsonia rosea, Norman, Transact, of the Tyneside Nat. Club; Vol. 5, p. 271, PI 13, 



figs. 13. 



Syn: Oyrianassa elegans, Norman (male). 

 Lamprops rosea, G. 0. Sars. 



Specific Characters. Body rather slender, especially in the male, with 

 the tail exceeding the anterior division in length. Integuments thin, semipellucid. 

 Carapace in female rather small, much shorter than the exposed part of the 

 trunk, upper margin straight, horizontal, lower evenly arcuate, sides perfectly 

 smooth, "pseudorostral projection very small, almost obsolete. Carapace of male 

 comparatively larger with the lower edges less regularly arcuate. Eye very large 

 and conspicuous, with beautiful red pigment and 8 corneal lenses. 1st pair of 

 legs exceedingly slender and elongated, when extended, fully twice the length of 

 the carapace, penultimate joint longer than the 3 preceding ones combined. 

 2nd pair with the last joint longer than the penultimate one. 3rd pair in female 

 slender, with the basal joint narrow linear and more than twice as long as the 

 remaining part of the leg; those in male, as usual, with the basal joint greatly 

 expanded, and moreover marked by the presence of 2 peculiar, smooth, falciform 

 spines appended to the inside of the ischial joint. Uropoda very slender, equalling 

 in length the last 3 caudal segments combined, inner ramus much longer 

 than the outer, with the 1st joint much the largest and armed inside with 

 about 15 spinules. Telson rather broad, lamellar, fully twice as long as the 

 last segment, and but slightly narrowed distally, with generally 2 pairs of slender 

 setiform spines laterally, and 8 spines issuing close together from the rounded 

 apex, the 2 outermost of which are longer than the others. Body ornamented 

 with a beautiful crimson pigment arranged in ramified, stellate patches both on 

 the carapace and the several segments. Length of female 6mm., of male 7 mm. 



Remarks. This form was first described by the Rev. A. M.Norman, but erro- 

 neously referred by him to the genus Vaunthompsonia of Sp. Bate, which is very 

 different. The adult male was described by the same author, but was not recog- 

 nized as such. It was recorded in the same paper under the name of Oyrianassa 

 elegans. Some years afterwards the present author found this species off the 

 Norwegian coast, and referred it to his genus Lamprops, not being at that time 

 aware of the sexual differences in that genus. It is a very beautiful form, 

 easily' recognizable in fresh condition by the bright crimson pigment ornamenting 

 the- body and especially the carapace. In the adult male the natatory exopodites 

 of the legs are very fully developed, and in order to receive the strong muscles 



