studies on marine Ostracods 0i2\ 



Endopodite: The first joint has three posterior bristles, all with short hairs. The lateral 

 one of these bristles is about as long as or somewhat longer or shorter than the two distal endo- 

 podite joints, the two others are somewhat shorter. 



Maxilla; — P r o t o p o d i t c: The bristle on the basale is relatively short, oidv 

 about half as long as the first endopodite joint; in exceptional cases it has at the middle m few 

 ratiier long secondary bristles. Endopodite: A couple of the six bristles on the anterior 

 edge of the first joint are usually furnished with rather long, stiff secondary bristles at the middle. 

 On the posterior edge of tliis joint there are two or three bristles, in most cases three. The 

 ventral side of the end joint is about as long as the breadth of the first endopodite joint distally 

 (calculated from front to l)ac-k); its dorsal side is about half as long. 



F i f 1 ii 1 i m V): — I* r o t o p o d i t e: The longer of the two tube-bristles on the second 

 ondite is always furnished at the middle with rather long, stiff secondary bristles. E n d o ] > ( i d i t e : 

 One of the three ventero-anterior bristles is of about the same length and type as the long bristles 

 on the endites of the protopodite, the two others are somewhat shorter and weaker (about the 

 same proportions as in my Hg. 27 of C. symmetrica) and have short hairs. This branch has no 

 spine armature. Exopod ite: First joint: This has two medio-ventral bristles, often sub- 

 (Hitial and about as long as the proximal height of this joint, and with short hairs. There are 

 three or four bristles in the proximo-ventral group; these are somewhat different in length, 

 the longest being in most cases about as long as or somewhat longer than the two medio-ventral 

 bristles, the shortest about half as long; the longest of these bristles has in most cases rather 

 long hairs at the middle, the others most frequently have short hairs. The disto- 

 ventral group of bristles consists of two or three short-haired bristles of somewhat different 

 leno'ths; their lengths vary in most cases within the same limits as in the case of the bristles 

 in the proximo-ventral group. The dorso-lateral bristle is furnished with long hairs. 

 I'ilosity: The protopodite and the first exopodite joint have sparse hairs medially, hut a])ait 

 from these this limb always seems to be bare. 



Sixth limb: — Exopodite: The ventral bristles on the first joint are perhaps 

 on the average somewhat shorter than in my fig. 29 of C. symmetrica; they all have rather long 

 hairs at the middle as is the case with the dorso-lateral bristles on this joint. The ventral bristle 

 on the end joint has short hairs. 



Penis: — • This is comparatively narrow and has about the same height throughout its 

 length; it is obliquely rounded off distally; cf. pi. IX, fig. 13, C. Claus, 1891 a. At about the middle 

 there is a series of about five or six oblique transverse muscles; there are no muscles distally of 

 these. It has a rather large, distally rovmded, copulatory appendage; cf. the adjoining fig. 8. 



Pure a: — The fifth claw is unusually decidedly bent; see pi. IX, fig. 2, C. Claus, 

 1891 a and my fig. 9. There is no unpaired bristle behind the claws. 



Rod-shaped organ: — The shaft reaches to about the proximal boundary 

 of the third joint of the first antenna or to the point of this limb. The capitulum is about as 

 long as the second joint of the first antenna; in the specimens investigated by me this part was 

 of about the type reproduced in the accompanying fig. 10, i. e. of about the same type as was 

 fouiul l)v C. Claus. 



