474 G. 0. SARS, 



liaviiig its f^rciitcst ciirv;itiire somewliiit above the middle. Tlie edge of the 

 expiuision is throughout densely fringed with small, hair-like bristles. 



The 2 anterior pairs of uropoda (fig. 10) resemble iu structure those in 

 N. caspius, though having a greater number of spines on the rami. 



The last pair of uropoda (fig. 11) are comparatively short, and have the 

 basal part armed at the end below with a transverse row of slender spines. 

 Tlie outer ramus is about twice as long as the basal part, somewhat tapering 

 distally, and edged with a limited number of slender setfo; its terminal 

 joint is very small, but well defined. The inner ramus is about half as long 

 as the outer, and carries on the tip 2 spines. 



The telson (fig. 12) is somewhat longer than it is bniiid at the base, and 

 has the cleft rather narrow. The lateral lobes are but slightly narrowed dis- 

 tally, and each carry on tlie bluntly truncated tip, a row of 4 slender spines. 



Occurrence. — This form has been collected by Dr. Grimm occasionally 

 in 5 different Stations, belonging partly to the southern, partly to the middle 

 part of the Caspian Sea, the depth ranging from 25 to 90 fathoms. 



Gen. Cardiophilus, G. 0. Sars, ii. 



Oenerk Characters. — Body much elongated, smooth, with the anterior 

 pairs of co.xal plates rather broad. Superior antenna^ of moderate length and 

 provided with a very small accessory appendage. Inferior antenna; extremely 

 small. Mandibles with the cutting part divided into 2 very narrow, almost 

 spiniform lamella', palp well develoj)ed. First pair of maxilla; with the palp 

 extremely small, biarticulate. Maxillipeds with the masticatory lobes carry- 

 ing, inside, flattened s])in('s, palps with i\\Q dactylar joint rudimentary, nodi- 

 form. Guathoiioda (in female) I'ather feeble, the |)osterior ones more elong- 

 ated than the anterior. Pereiopoda with strong, hooked dactyli, basal joint 

 of tlie 3 posterior jiairs but slightly expanded. Last pair of uropoda very 

 small, scarcely extending beyond the others. Telson short, deeply cleft. 



B,emarks. — This new genus is f(»unded u])on a small Amphipod, whicli 

 is stated, at least occasionally, to lead a parasitic existence, having been 

 found within the mantle of a species of Gardium. The structure of the oral 

 parts and the strongly hooked dactyli of the pereiopoda "would, indeed, seem 

 to point to a serai-parasitic habit. 



23. Cardiophilus Baeri, G. 0. Sars, n. sp. 



(PI. 11, Hgs. 13—27). 



Spc'ifir Ghuraiters. — Bod.\' extremely slender and elongated, nearly 

 smooth throughout. Lateral lobes of cephalon evenly rounded. Anterior 



«J>uy.-MaT. crp. 3U4. 5:^ 



