[35] 



DECAPODA FROM ABLATROSS DREDGINGS. 



379 



The genus Notostomus is very closely allied to Meningodora and it is 

 quite possible that it will be necessary to unite them. 



Measurements in millimeters. 



station 2042 



Sex 



Length from tip of rostrum to tip of telaon 



Length of carapax including rostrum 



Length of rostrum 



Eight of carapax 



Breadth of carapax 



Length of eye-stalk and eye 



Greatest diameter of eye 



Length of antennal scale 



Breadth of antennal scale 



Length of second perseopod 



Length of first peraeopod 



Length of chela 



Length of dactylus 



Length of second peraeopod 



Length of chela 



Length of dactylus 



Length of third peraeopod 



Length of propodns 



Length of dactylus 



Length of fifth peraeopod 



Length of propodns 



Length of dactylus 



Length of sixth somite of pleon 



Hight of sixth somite of pleon , 



Length of telson 



21.0 

 7.8 



42 



38 

 9.5 

 3.5 



46 

 9.4 

 3.2 



75 



34.5 

 3.5 



65 



25 

 0.7 



n.8 



9.3 

 24.0 



25 



6.6 



4.4 

 20.5 



8.5 

 44 

 36 



9.4 



3.6 

 45 



9.3 



3.2 

 70 

 3L5 



3.6 

 63 

 24 



0.6 

 13.0 



9.0 

 24.5 



Station 2042, July 30, north lat. 39o 33', west long. 68° 26' 45", 1,555 

 fathoms, globigerina ooze, temperature 38^° — 1 male (7051). Station 

 2074, September 3, north lat. 41° 43', west long. 65° 21' 50", 1309 fath- 

 oms, fine mud, temperature 40<^ — 1 female (7052). 



Meningodora mollis Smith. 



Bull Mas. Conip. Zool. Cambridge, s, p. 74, pi. 11, figs. 8-9, pi. 12, figs. .5-9, 



1882. 



One male (7051) was taken August 1 at Station 2051, N. lat. 39° 41', 

 W. long. 69° 20' 20", 1,106 fathoms, blue mud and globigerina ooze, 

 temperature 39°. 



On account of the extreme softness of the entire animal, tbis speci- 

 men, like the single female from which the species was first described, 

 is in rather bad condition, but it has the perseopods complete, and ena- 

 bles me to supplement the original description to a considerable extent. 



The dorsal carina, over and back of the base of the rostrum, is armed 

 with about seven minute spiniform teeth. The proximal part of the 

 uj)per flagellum of the antennula is much stouter than the lower, strongly 

 comiiressed, and its outer inferior surface clothed with short hairs. 

 The antennal scale is considerably more than twice as long as broad, 

 very thin, foliaceous, slightly narrowed distally, and obliquely rounded 

 at the tip. 



The first perseopods are scarcely stouter than the second gnathopods 

 and fall considerably short of their tips : the merus is compressed and 

 as long as the proximal segment of the endopod of the second gnatho- 



