76 ZOOLOGICAL COLLECTIONS MADE DURING [Jan. 4, 



whole surface of the segments. The first and the second postabdomuial 

 segments are similarly ridged, but firmly united together ; the ter- 

 minal portion (formed of the coalescent remaining segments) is ovoid, 

 more closely and distinctly granulated than the rest of the body, 

 and terminates in two acute spines. The eyes are placed in the 

 lateral margins of the head. Antennules very small. Antennae a 

 little longer than the body, with the last two joints of the peduncle 

 about equal ; flagellum short, 9-jointed, the first joint as long as the 

 three following. The inferior margins of the last three joints of the 

 first to fourth pairs of legs (which increase successively in length) 

 are clothed with long close hairs. The dactyli of the fiftli to seventh 

 legs are strong and slightly arcuated. The operculiform posterior 

 pair of postabdominal appendages are granulated on their outer 

 surface. Length 1 inch (exclusive of antennse). 



A single female was obtained, at a depth of 30 fathoms, in Trinidad 

 Channel, on a sandy bottom. 



This beautiful species is at once distinguished by the strongly 

 granulated body and the spines of the last postabdominal segment. 



On account of the extreme brevity of the fourth segment of the 

 body, it would be placed in the subgenus Leachia were the character 

 valid even as a specific distinction ; but the Rev. T. E. R. Stebbing 

 (Ann. & Mag. Nat. Hist. ser. 4, xv. p. 187, 1875) has pointed 

 out that in the case of Arcturus lineatus this segment, which is 

 elongated in the adult, is shorter in the young individual ; there 

 can be no doubt therefore that Arcturus aud Leachia must be 

 united. 



Serolis scythei. 



Serolis scythei, Liitken, Natnrhist. Vidensk. Medelelser, p. 98, 

 pi. i. A. figs. 12, 13 (1858) ; Grube, Arch, f Naturg. xli. pp. 209, 

 220, pi. V. fig. 1. pi. vi. fig. I (1875). 



Two males were obtained in Trinidad Channel, Straits of Magellan, 

 at 30 fathoms ; and an adult female with ova, together with eight 

 smaller individuals, in 4 fathoms, at the same locality. 



It is very nearlj' allied to S. paradoxa, Fabr. {S.fabricii, Leach), 

 which I have regarded as identical with S. orbignyana, M. -Edwards, 

 and which is very common at the Magellan Straits and Falklands — • 

 but appears to be constantly distinguished by the much greater 

 length of the coxeb, which in the second postabdominal segment 

 reach nearly to the end of the terminal segment. 



ISOPODA. 



Idotea annulata ? 



Ildotea annulata, Dana, Crust. U.S. Explor. Exped. xiv. p. 701, 

 pi. xlvi. fig. 3 (1853) ; Cunningham, l. c. p. 499 (1871). 



To this species I refer, with some hesitation, four specimens col- 

 lected at Port Henry. They are of a uniform chestnut-brown 

 colour ; the anterior margin of the head is straight or very slightly 

 excavated ; the eyes are rather prominent, and situated on the sides 



