GAMMAUIDJK. 139 



y. Atylus creuulatus. (I'late XXVI. fig. G.) 



Ampliitoii cTtiuilata, Knii/cr, Grm. Amjip. p. 50. pi, 3. f. 12. 

 Edw. Hist. (Its Cni.s/. iii. p. 33. 

 Liljchonj ill Of vers. <if Koiitjl. Vdoisk.Akad.FurJKnuU. p. 22, 1851. 



Dor.sil siirfticc not dentatcd. lludiinontaiy rostnim depressed between 

 the supenor antenna). Eyes renil'orm. Antenna) subc(jual, lialf 

 the length of the animal ; peduncles not half the length of their 

 respective antenna). Superior antenna) furnished upon the inferior 

 .surface of the peduncle with fasciculi of short stiff hairs. Tnfciior 

 antenna) furnished upon the superior surface of the peduncle with 

 fasciculi similar to, and corresponding with those upon the sui)erior 

 antenna). Gnathopoda slender. Posterior pair of pleopoda ha^-ing 

 the rami lanceolate, ciliated, and longer than the peduncle. Telson 

 deeply cleft, each division long and pointed. 



Length (not given). 



Ilah. Greenland {Kroi/er). 



Edwards describes the telson as consisting of " two lanceolate 

 lameUa) ; " but in all other respects the figure given by Kriiyer belongs 

 to this genus ; hence I am inclined to think the telson to be deeply 

 cleft, and not doiible. 



9. Atylus corallinus. 

 Atylus corallinus, Hisso, Eur. Merid. p. 44. 

 " Ha\-ing the thorax smooth, coralline \corallino]. Last five segments 

 of the pleon carinated. Eyes grey. All the appendages mono- 

 dactyle*, third pair longest. 

 " Length 0-012 by 0-003. Female larger than the male. 

 " Uah. Upon Fuciis spiralis. South of France." — Itisso. 



The author saj's that this species differs in many characters from 

 A. carinatns ; but. as far as so meagre a description can assist one, I 

 am inclined to believe it to be Dexaminc spinosa. 



10. Atylus spinulicauda. 



Notrotopis spinulicauda, t'usta, lleiid. dc/la JReale Accad. dcllc Sci. di 

 Napoli, p. 173, 1H53. 



" Cephalon anned w^th a short rostnim. Seventh segment of the 

 pereion and each of the first five of the pleon dorsally and posteriorly 

 produced into a spine ; sixth segment carinated, and crowned with 



* The term ' monodacf yle ' is mostly used by older authors when the gnathopoda 

 are small and slender; Leach in his description of tliis melius stales tlieni (o ho 

 niono(la<tyle, but observaliiiii sliows them to be siil)chelate. Tlic terms ' iiiono- 

 daelyle' and 'prehensile' possess too broad a signiiieation to be useful in do- 

 i^cription. 



