4 CARL BOVALLIUS, AMPHIPODA IIYPKRIIDEA. I. 2. CYLLOPODIDjE. 



, The old geims constitutiiig the family is Cjdlopus, Dana; probably the animal described 

 by Strbets (see below) under the nauie Hyperia tricuspidata belongs to this family; I have 

 proposed for it the generic name Cyllias; but 1 arn not fully sure that I am right in 

 placing it here as I have not exainined the animal myself. 



A. The carpus of the first pair of pereiopoda is not broader than that of the second pair, 



which is produced into a process I. Cyllopus. 



B. The cariHis of the first pair of pereiopoda is much broader than that of the second 



pair, which is not produced into a process... 3. Cyllias. 



Genus 1. CYLLOPUS, DANA, 1852. 



Diagn. Caput globosuui, tuiniduiii. Oculi grandes, totuni fere caput occupantes. Fedes pereii primi 

 paris carpo non dilat?ito; pedes secimdi paris subcheliforraes, carpo plus minusve producto. 

 Femur pedum septimi paris maximum, articulis sequentibus longius. Telson parvum, semi- 

 circulatum. 



The head is globular, tumid. The ei/es are large, occupying almost the whole head. The 

 first pair of pereiopoda with the carpus not dilated; the second pair are subcheliform, with the 

 carpus more or less produced. The femur of the seventh pair is very large, longer than 

 the following joints together. The telson is small, semicircular. 



Syn. 1852. C^Z/o/jms, DANA. — United States Exploring Expedition. Crustacea. Vol. 2, p. 989. 



» » Spence Bate, 1862. Catal. Amph. Crust. Brit. Museum, p. 305. 



» » C. BovALLius. 1887. »Arctic and Äntarctic Hyperids». Vega-Exp. Veteusk. Iakt- 



tagelser. Bd. 4, p. 555. 



The genus Cyllopus was founded in 1852 by Dana for an äntarctic Hyperid, taken 

 during the United States' exploring expedition 1838 — 42, under the conimand of Captain 

 WiLKES. It was one of the inaiiy precious additions to the knowledge of the pelagic fauna 

 given by this raemorable expedition. The species Cyllopus luagellanicus was not recognized 

 by the next investigator on the same subject Spence Bate, who applied the name on a 

 specifically different animal viz. Cyllopus Batei (see below); at the same time he proposed 

 two new species viz. Cyllopus Dance and Cyllopus Lucasii, of which the iirst one possibly 

 is only an elder form of Cyllojjus magellanicus, Dana, but the second, Cyllopus Lucasii 

 seeuis to be a well characterized species. The genus had got no more additions to the 

 number of its species before I made my revision of the tribe. Presently the species are 

 seven in number, the just published new species of Stebbing being added. 

 A. The carpus of the first pair of pereiopoda is not produced. 



a 1. The epimerals of the first four pereional segments are much deeper than 



the following 1. C. magellaaicus. 



a 2. The epimerals of the first four pereional segments are not deeper than 

 the following. 

 aa 1. The metacarpi of the first and second pairs of pereiopoda are 

 scarcely serrated. 



