330 History of British Entomostraca. 



5. Cyclops Stromii Plate IX. Fig. 23-25. Nova species — Specific Charac- 

 ter — Antennis curtis ; capite rostrato ; manibus unguiculatis, cauda biloba, 

 setis duobus brevibus instructa ; ovario externo unico. 



Habitat. Shore at Cockburnspath, Berwick bay, &c. 



Description. — Body and tail, as in the others, consist of ten seg- 

 ments, gradually tapering to extremity without any very decided 

 difference between tail and body. First segment the largest, fur- 

 nished with a conical beak — last segment terminating in two lobes, 

 which give issue to two setae, much shorter than in the preceding- 

 species, being scarcely half the length of the body. Antennae of about 

 eight articulations ; at junction of fifth with sixth, having a late- 

 ral ring. In male (Fig. 25) the swelling and hinge-joint are as in 

 preceding species. All the articulations of the antennae throw for- 

 ward one or more short setae. Antennules, as in the preceding 

 species, of two articulations, the second being terminated by about four 

 pretty long setae. Mandibles were not seen ; hands, like those of 

 C. minutus, consist of two articulations, and a pretty strong hook, 

 which points upwards. First or thoracic pair of feet have the ex- 

 ternal or superior stalk much smaller and shorter than the other, 

 and is divided into three joints, the last of which is terminated by 

 three pretty strong setae or small hooks. The internal or in- 

 ferior is much the longer of the two, and consists of two articula- 

 tions, the first being very long in proportion to the second, which 

 is exceedingly short and terminated by a curved hook. The abdo- 

 minal feet are exactly the same as in last species — and the fulcra 

 or supports which I could not examine accurately, seemed to be also 

 similar to those of the chelifer. I have named this species after 

 Strom, who has given a description of a species of Cyclops in the 

 Acta Hafniae, 9th vol. which has some resemblance to this, as 

 translated by Muller in his Entomostraca, under the name of C 

 brevicornis. * 



6- Cyclops fur catus. Plate IX. Fig. 26-28. Nova species — Specific Cha- 



* In the edition of the Acta Hafniae in the British Museum, the figures which 

 Strom gives of the brevicornis are unfortunately awanting. In Muller's de- 

 scription of the brevicornis, which he professes to take from Strom, he says the 

 tail setce are very short, " setis caudae brevissimis," while Strom in his descrip- 

 tion says they are very long, " setis caudaa binis longissimis" ! In my paper 

 in the Transactions of the Berwickshire Naturalists' Club, I have quoted the 

 species described above as the C. brevicornis, taking the description as given 

 by Muller, not having at that time seen the Acta Hafniae — and not being aware 

 of the discrepancy which exists between the two descriptions. Vide Strbm'fi 

 paper in " Det Kiobenhavnske Sclskabs skrivter," 9th vol. p. 590,17(>5. 



