Si/n(i/ii/i)is. 



702 TAGE SKOGSBERG 



First antenna: — This is of the type reproduced by C. Claus, 1891 a. The first 

 and second joints are only slightly separated. The second joint has no bristles. The e-bristle 

 is characterized by the fact that it has rather mimerous moderately long, fine hairs along the 

 anterior side of its proximal third; it is not sword-shaped distally. There were no yellow pigment 

 corpuscles in this limb in the specimens investigated by me. This antenna is bare. 



Second antenna: — The p r o t o 2^ o d i t e is almost as well developed as 

 in the male. The proportion between the length of the protopodite and that of the e x o p o- 

 d i t e is about the same as in the male. Endopodite: This has two joints; I did not 

 succeed in discovering any boundary between the original second and third joints. The type 

 is about the same as in C. Clals's pi. I, fig. 5. 1891 a and G. W. Muller's pi. 6, fig. 7, 

 1894. The a- and b-bristles have short hair . The g-bristle is about half as long as the proto- 

 podite, not or only slightly sword-shaped distally and furnished with sparse short hairs. The 

 f-, h-, i- and j -bristles are of somewhat different lengths, about a third or a fifth shorter than 

 the g-bristle, bare and with scarcely perceptibl shafts; otherwise they are of the same tvpe 

 as in the male. I was not able to discover any bristle between the h- and i-bristles. Pilosity: 

 The second endopodite joint is bare. 



Sixth limb: — Unlike what is the case in the male this is equipped with the normal 

 number of bristles for this genus. E x o p o d i t e: Ml the bristles on the first joint are relatively 

 short and weak; the dorso-lateral one especially is very much shortened; it is about as long as 

 or even somewhat shorter than the dorso-distal one. Some of the ventral bristles on this joint 

 often have short hairs; the dorso-lateral one has in most cases rather long hairs. 

 End joint: The dorsal claw and the ventral claw are often only about half as long as the 

 middle claw. 



Rod -shaped organ: (fig. 9) — This is of the type reproduced by the above- 

 mentioned writers; it has two fine points distally and is bare; cf. p. 707 below. 



Remarks: — The species C sfinirostris described by C. C'lals, 1874 a and b is pre- 

 sumably not a unit, as it is rather probable that the males and females grouped under this name 

 belong to different species. The descriptions and figures of both sexes are extremely incomplete 

 and do not permit of a quite certain identification of the species. It was also with rather consid- 

 erable hesitation that I identified the form dealt with by me above with the male of this species 

 of Claus's. This identification is based chiefly on C. Claus's figure of the first antenna, pi. I. 

 fig. 8. With regard to this figure I wish to point out specially the length of the a-bristle and the 

 armature of the e-bristle; on the latter bristle we count ten rather strong, closely situated spines 

 (certainly = jjairs of spines), proximally of which one considerably weaker spine is found. The 

 length of the shell stated by C. Claus, namely 1,2 — 1,4 mm., which may seem, of course, to 

 be evidence against this identification, presumably refers, like other statements in the diagnosis 

 (scarcely three lines in length!), to the female specimens. A comparison between C. Claus, 

 pi. I, fig. 1 and the figure 3 inserted here of the female shell should be enough to show with 

 all desirable clearness that the females described by this author under this name 

 in the works mentioned do not belong to the species dealt with hv iiie above; in C. CL.'MJS's 



