CRUSTACEA MALACOSTRACA. IV. 31 



carapace, rather slender, and all segments excepting the sixth adorned with a median dorsal row of long, 

 curved teeth (figs. 5 a and 5 c), a median ventral row of short teeth, and on each side far below the middle 

 a longitudinal row of curved teeth shorter than those on the dorsal edge ; sixth segment with a few teeth. 



The antennulae (fig. 5 a) slender; first joint of the peduncle much longer than second, which is some- 

 what longer than the third; outer flagellum about as long as second peduncular joint, while the inner flagel- 

 lum is minute. The antenna; without setae on the distal joints of the peduncle; the distal part of flagellum 

 lost. Third maxillipeds with a strong tooth on the merus. The thoracic legs slender and somewhat long (fig. 

 5 a) ; in first pair the propodus is slightly shorter than the carpus and twice as long as the dactylus ; in second 

 pair the carpus is as long as the dactylus; in fourth pair the second joint has several fine teeth on its outer 

 margin. -- The uropods are very long and slender; the peduncle, which is as long as the two posterior seg- 

 ments together and about twice as long as the endopod, is adorned with three rows of teeth (fig. 5 d), viz. 

 two with short teeth on the outer side and a row with longer teeth on the upper side rather near the inner 

 margin; the endopod has on the inner margin 3 short, setiform spines on the proximal half and on the distal 

 half 3 real spines, and between the two distal spines some three saw-teeth, while the end has a long, thick 

 spine; the exopod is a little shorter than the endopod, with a single spine on the inner margin and an apical 

 spine. 



Length 4 mm. 



Remarks. This species is easily recognized by the beautiful rows of teeth on the abdominal seg- 

 ments and the uropods. Besides the type I have the cephalothorax of a much smaller male which I refer 

 to this species, though it differs in having seemingly only 3 or perhaps 4 dorsal processes on the carapace, 

 while the teeth on the free thoracic segments are with few exceptions either lost or scarcely discernible; 

 antennulae, maxillipeds and thoracic legs similar to those in the type. 



Occurrence. Taken by the "Ingolf" at a deep station in the warm area. 



Davis Strait: Stat. 36: Lat. 6i°5o' N., Long. 56 & 2i' W., 1435 fath., temp. 1.5°; i 1 ., specimens. 



2j. Cumella carinata H. J. H. 



11887. Campylaspis carinata H.J.Hansen, Vidensk. Medd. Naturh. Forening i Kjobenhavn for 1S87, 



p. 207, Tab. VII, Fig. 4 — 4 a. 

 1905. Cumettopsis Caiman, Fisheries, Ireland, Sci. Invest. 1904, I. (1905), p. 28. 



1912. Cumella(}) ■ — Caiman, Proc. U. S. Nat. Mus., Vol.41, p. 426. 



When I established the present species I had only a single specimen not belonging to our Museum, 

 and therefore could not well dissect the mouth-parts, etc., of its left half. In 1905 Caiman published notes 

 on the mouth-parts and thoracic legs as results of an examination of a single specimen, and he was liable 

 to refer it with some doubt to his new genus Cumcllopsis. But in 1912 he returns to the subject, as he has 

 obtained more material, and he is now of the opinion that the curious animal is more related to Cumella, 

 in reality does not differ from that genus in any character justifying the establishment of a new genus. And 

 according to his observations we may also safely omit the query still used by him. 



