KONGL. SV. VET. AKADKMIENS HANDLINGAR. BAND. 22. N:f) 7. ,^,91 



In the same year he described the male form of the species as follows: 



»Die Hyperine, welche ich als Männchen der Plir. elongata in Ansprueh nelime, hat eine 

 Länge von c. 12 mm. iind schliesst sicli in der gesammten Leibesform dem beschriebenen Weib- 

 chen an; allerdings fällt, der gedrungene Bau des Abdomens iind die kräftigere Entwicklung 

 seiner 3 Schwimmfusspaare als eine Differens in die Augen, welcher man anfangs die Bedentung 

 einer Artvei-schiedenheit beilegt, indess gewinnt man durch die Untersuchung der Augen und 

 namentlich der Mundwerkzeuge und der Brustgliedmassen bald die Ueberzeugung, dass es sich 

 nur um Unterschiede des Gesclilechtes handelt. Die Mundtheile stimmen mit denen des Weib- 

 chens fast vollständig uberein, der inneren Lobus der ersten Maxille besitzt ganz diéselbe Be- 

 zahnung als dort, der äussere die gleichen Kerben an dem einen Seitenrande. Nur das dritte 

 zur Unterlippe verschmolzene Kieferpaar zeichnet sich durch eine mediane kammartige Erhebung 

 des Basaltheiles aus. Die Thoracalfusse aber zeigen bis in die Einzelheiten die nänilichen Form- 

 und Grössenverhältnisse, entbehren aber der inneren blattförmigen Anhänge, welche beim Weib- 

 chen am dritten, vierten und funften Paare zur Herstellung eines Brutraumes dienen. Die 3 

 Paare von Branchialsäckchen sind an den entsprechenden Segmenten vorhanden, und der Mangel 

 jener Lamellen weist auf die Natur und die Leistungen des männlichen Gesclilechtes hin. Ebenso 

 wird man auch die allerdings auffallend modificirten Antennen auf die eigenthumlichen Leistungen 

 des Männchens zuruckfiihren können.y 



In 1877 Streets gave a detailed specific description of Anchylonyx hamatup., from 

 which I reproduce the following passages. 



» — — — Segments of the thorax six; the first and second soldered together; the five 

 anterior subequal; the sixth (the seventh normal) narrows posteriorly, and is nearly as long 

 as the two preceding. First pair of gnathopoda shorter and slenderer than the second; meros 

 of the same length as the preceding joint, slightly produced inferiorly at the distal extremity 

 — the produced portion finely serrated below and anteriorly, at the angle one of the serru- 

 lations produced to a fine acicular spine; carpus long, at inferior apex a slender spine pro- 

 podos somewhat shorter than the carpus, arched; dactylus about one-half the length of the 

 propodos, arched, acute, notched below the apex, with a wing-like plate on either side of 

 base. The carpal and meral joints of the second pair of gnathopoda neither produced, nor 

 spiniferous; dactylus less than one-half the length of the propodos; with these exceptions the 

 second pair is similar to the first. First and second pairs of thoracic feet longer than the 

 third; the first pair longer than the second; the external surface of the coxas ridged along 

 the middle, with posterior angles acute, spinous; all the joints narrow and elongate; claw an- 

 chylosed with the tarsus, and fixed at a right angle to it; the apex of the tarsus produced in 

 the form of a long, straight, acute spine. The third pair of thoracic feet enlarged, niore robust 

 than the others, with coxa ridged on the middle of the external surface, and with the anterior 

 and posterior margins armed with short, stout spines; meros slender, convex posteriorly, and 

 anteriorly concave; anterior surfaces of the carpus and meros armed with long, sharp teeth — 

 three on the latter, and seven on the former; the fifth tooth, counting from the base of the 

 carpus, much larger and longer than the others; propodos about half the length of the carpus, 

 arched; dactylus small, anchylosed, fixed at a right angle to the propodos. Fourth and fifth 

 pairs of feet subequal, shorter than the preceding, with the anterior angles of coxa; spinous; in 

 other respects similar to the preceding. — — — » 



In 1883 he gave a new description of male and female specimens under the name 

 Phronimella elongata, Claus. The following passages may be quoted. 



nFeynale: — — — The first pair of caudal appendages terrainate half way the rami of the 

 third pair; the second pair rudimentary, represented only by a projecting tubercle». 



»71/afe: The body of the animal smaller and stouter than the female; the last two 



joints of the third pair of feet relatively shorter, and all the feet shorter and more robust; the 

 fifth joint of the fifth pair about one-half the length of the fourth joint, and impinges on the large 

 tooth anterior to its middle. The second pair of caudal appendages well developed, and extends 

 to the comniencement of the rami of the first pair.» 



i 



