CRUSTACEA MALACOSTRACA. IV. 29 



Distribution. S. I. Smith recorded this species from off Halifax, Nova Scotia, depths from 42 

 to no fath., and Gulf of St. Lawrence, 70 fath. Caiman (1912) enumerates several localities near the east 

 coast of North America from Battle Harbour, Labrador, southwards to the Gulf of Maine at Lat. 42 44' N., 

 depths from 42 to no fath.; besides he records it from two localities in the Bering Sea, between about Lat. 

 57" and 57 1 / 2 ° N., Long. i64°25' — 164^27' W., 29 and 36 fath. 



Family Nannastacidae. 



This family is richly represented in the "Ingolf" area, as no less than 4 of the 7 genera hitherto 

 established have been found. 



Cumella g. o. Sars. 



The forms belonging to this genus differ much from each other in general aspect, as in some species 

 the legs and uropods are rather short and stout, but long and very slender in other forms. Furthermore the 

 sexual differences as to armature of the carapace, shape of some of the joints in the thoracic legs and some- 

 times in the eyes are uncommonly pronounced. In the "Ingolf" area 2 new species have been discovered, 

 and I follow Caiman in referring Campylaspis carinata H. J. H. to Cumella, so that 3 species are mentioned 

 here. 



25. Cumella tarda n. sp. 

 (PL II, figs. 4 a— 4 g.) 



Adult Male. In general aspect similar to the male of C. pygmcea G. O. S. 1 , but it is somewhat 

 larger and several appendages are longer and more slender. As in that species the dorsal line of the carapace 

 is nearly straight and completely without teeth, but the antero-lateral corner is broadly rounded, without 

 angle or teeth, and the most anterior part of the carapace is less deep than in C. pygmcea, as its lower margin 

 is more ascending. Pseudorostrum (figs. 4 a — 4 b) is distinctly upturned, short, but yet longer than in C. 

 pygmcea; its front margin is, seen from the side, somewhat oblique, with about four teeth on its lower half. 

 The eye is not quite as large as in C. pygmcea and differs materially in having 4 pairs of ocelli, while C. pyg- 

 mcea has 3 pairs and besides in the median a single very large ocellus not found in C. tarda ; the dark pigment 

 between the ocelli is more or less developed. The free thoracic segments and the abdomen nearly as in 

 C. pygmcea. 



The antennulae (fig. 4 c) have the peduncle slender, considerably longer and much more slender than 

 in C. pygmcea ; its third joint is a little shorter than the second and distinctly longer than the upper flagellum. 

 (The flagellum of the antennae lost). Second maxillipeds (fig. 4 d) mainly as in C. pygmcea, though more slender. 

 Third maxillipeds (fig. 4 e) with third to sixth joint much thinner than in C. pygmcea.; as in that species the 

 merus has a tooth on the outer side. First pair of legs (fig. 4 f) differ much from those in C. pygmcea as fig- 



' I refer to Sars' representation of this species in 1879, as he there gives a much higher number of figures of the 

 male than in his "Account", 1900. 



