338 THE VOYAGE OF H.M.S. CHALLENGER. 



pair of pleopoda biramoiis, foliaceous. Telson nearly as broad at the base as the preceding 

 segment of the pleon." 



" This genus is very closely allied to Pronoe, but diifers in the form of the superior antennae 

 and of the gnathopoda, and in the fusion of the fourth and fifth segments of the pleon into 

 one." The type species is AmpJiipi-onoe cuspidata, n. s. Claus gives up this genus as not 

 defined with sufficient accuracy. On the supposition that the first and second gnathopods 

 have been interchanged in the description, he thinks it might be the same as his own genus 

 Parapronoe. In any case the distinction drawn between Amphipronoe and Pronoe 

 grounded on the fusion of the fourth and fifth segments into one, seems untenable, the rule 

 in the Hyperina being that the fifth and sixth segments, not the fourth and fifth, of the 

 pleon, coalesce. 



In Fam. 5. Oxtcephalid;e, " Subfam. 1. Synopiades " is certainly out of place. In Subfam. 2. 

 OxYCEPHALiDES, Oxyceplicdus tuberculatum, n. s., is, according to Claus, a synonym of 

 Ox'ijcephalus piscator, M.-Edwards ; '^ Rhahdosoma Whitei, n. s.," according to Claus, is the 

 male of Rhabdosoma armatmn, M. -Edwards. 



Group Aberrantia. Fam. 2. CAPEELLiDiE. Caprdla ccdva, n. s., is recognised in the Brit. 

 Sess. Crust, as = CapreUa acanthi/era, Leaeli ; CapreUa ultima, u. s., according to Mayer 

 = 1? Gaprella xqmlibra, Say. 



1862. Bate, C. Spence. 



Note on tlie s-apposed " Discovery of an extremely minute Vertebrate Lower 

 Jaw in mud dredged at St. Helena, by Dr. Wallich, F.L.S." The Annals and 

 Magazine of Natural History. 3 Ser. Vol. X. December 1862. pp. 440-441. 



The supposed jaw in Mr. Spence Bate's opinion may be the dactylos or last joint of a leg of a 

 small Syperine Crustacean. He figures a leg of Phroslna longispina for comparison, 

 and supposes that Dr. Wallich may have been misled by seeing a second row of mar- 

 ginal armature within the external one, such as appears in Crustacea near the period 

 of moulting. 



1862. Claus, C, 



Bemerkungen iiber Pkronima sedentaria Forsk. und elongata n. sp. Abdruck 

 aus der Zeitschr. f. wissensch. Zoologie. Bd. XII. Hft. 2. 1862. pp. 189-196. 

 Mit Tafel XIX. 



In the heart of Phnmima sedentaria, " the three pairs of lateral openings, which serve as venous 

 Ostia for the reception of the blood flowing back from the body to the heart, are found in 

 the second, third, and fourth thoracal-segments." From the point of the heart an arterial 

 vessel, constituting the abdominal Aorta, stretches from the middle of the sixth peraeon- 

 segment almost to the middle of the third pleon-segment. The Aorta cephalica is also 

 mentioned. Claus also here speaks of two fine strings in the third and fourth peraeon- 

 segments running " von der ventralen Fliiche des Herzens aus schriig nach oben und vorn 

 zum Magen," which he supposes may serve for fastening, although at first inclined to regard 

 them as arteries. In his later work on the Phronimidie 1879, he finds that these are really 

 lateral arteries, constant in the genera of the Phronimidte, and in Paraplironima and several 

 other Hyperina supplemented by a third pair. He says that Pagenstecher has attributed 



